Transport of uranium(VI) in red soil in South China: influence of initial pH and carbonate concentration.
作者：
Fu, Haiying;Ding, Dexin* ;Sui, Yang;Zhang, Hui;Hu, Nan;...
期刊：
Environmental Science and Pollution Research ,2019年26(36):37125-37136 ISSN：0944-1344
通讯作者：
Ding, Dexin
作者机构：
[Ding, Dexin; Zhang, Hui; Ye, Yongjun; Dai, Zhongran; Li, Guangyue; Li, Feng; Hu, Nan; Wang, Yongdong; Fu, Haiying] Univ South China, Key Discipline Lab Natl Def Biotechnol Uranium Mi, Hengyang 421001, Peoples R China.;[Ding, Dexin; Zhang, Hui; Ye, Yongjun; Dai, Zhongran; Li, Guangyue; Li, Feng; Hu, Nan; Wang, Yongdong; Fu, Haiying] Hunan Prov Key Lab Green Dev Technol Extremely Lo, Hengyang 421001, Peoples R China.;[Sui, Yang] Univ South China, Sch Nucl Sci & Technol, Hengyang 421001, Hunan, Peoples R China.
通讯机构：
[Ding, Dexin] U;[Ding, Dexin] H;Univ South China, Key Discipline Lab Natl Def Biotechnol Uranium Mi, Hengyang 421001, Peoples R China.;Hunan Prov Key Lab Green Dev Technol Extremely Lo, Hengyang 421001, Peoples R China.
关键词：
Column experiment;Competitive adsorption;Hydrus-1D;Overshoot;Uranium migration
摘要：
Uranium-contaminated wastewater associated with uranium (U) mining and processing inevitably releases into soil environment. In order to assess the risk of U wastewater contamination to groundwater through percolation, U adsorption and transport behavior in a typical red soil in South China was investigated through batch adsorption and column experiments, and initial pH and carbonate concentration were considered of the high-sulfate background electrolyte solution. Results demonstrated that U adsorption isotherms followed the Freundlich model. The adsorption of U to red soil significantly decreased with the decrease of the initial pH from 7 to 3 in the absence of carbonate, protonation-deprotonation reactions controlled the adsorption capacity, and lnCs had a linear relationship with the equilibrium pH (pHeq). In the presence of carbonate, the adsorption was much greater than that in the absence of carbonate owing to the pHeq values buffered by carbonate, but the adsorption decreased with the increase of the carbonate concentration from 3.5 to 6.5 mM. Additionally, the breakthrough curves (BTCs) obtained by column experiments showed that large numbers of H(+) and CO3(2-) competed with the U species for adsorption sites, which resulted in BTC overshoot (C/C0 > 1). Numerical simulation results indicated that the BTCs at initial pH 4 and 5 could be well simulated by two-site chemical non-equilibrium model (CNEM), whereas the BTCs of varying initial carbonate concentrations were suitable for one-site CNEM. The fractions of equilibrium adsorption sites (f) seemed to correlate with the fractions of positively charged complexes of U species in solution. The values of partition coefficients (kd(')) were lower than those measured in batch adsorption experiments, but they had the same variation trend. The values of first-order rate coefficient (omega) for all BTCs were low, representing a relatively slow equilibrium between U in the liquid and solid phases. In conclusion, the mobility of U in the red soil increased with the decrease of the initial pH and with the increase of the initial carbonate concentrations.
语种：
英文
展开
Linear beta-Cyclodextrin Polymer Functionalized Multiwalled Carbon Nanotubes as Nanoadsorbent for Highly Effective Removal of U(VI) from Aqueous Solution Based on Inner-Sphere Surface Complexation
作者：
Xue, Jin-Hua;Zhang, Hui;Ding, D. X.* ;Hu, Nan;Wang, Yong-Dong;...
期刊：
Industrial & Engineering Chemistry Research ,2019年58(10):4074-4083 ISSN：0888-5885
通讯作者：
Ding, D. X.;Wang, Yong-Sheng
作者机构：
[Zhang, Hui; Hu, Nan; Ding, D. X.; Xue, Jin-Hua; Wang, Yong-Dong] Univ South China, Key Discipline Lab Natl Def Biotechnol Uranium Mi, Hengyang 421001, Hunan, Peoples R China.;[Xue, Jin-Hua; Wang, Yong-Sheng] Univ South China, Coll Publ Hlth, Hengyang 421001, Hunan, Peoples R China.
通讯机构：
[Ding, D. X.; Wang, Yong-Sheng] U;Univ South China, Key Discipline Lab Natl Def Biotechnol Uranium Mi, Hengyang 421001, Hunan, Peoples R China.;Univ South China, Coll Publ Hlth, Hengyang 421001, Hunan, Peoples R China.
摘要：
Linear β-cyclodextrin polymer functionalized multiwalled carbon nanotubes (MWCNTs-CDP) were synthesized and employed as a novel nanoadsorbent to remove uranyl ions in wastewater solutions. The characterization of MWCNTs-CDP, with Fourier transform infrared (FT-IR), X-ray diffraction (XRD), scanning electron microscopy (SEM), and Brunauer-Emmett-Teller (BET), suggested that the CDP was successfully modified on the MWCNTs surfaces. The removal efficiency of uranyl ions in aqueous solution by MWCNTs-CDP was investigated via varying various experimental conditions. We found that the removal of uranyl ions correlated with both pH and temperature, and the optimum pH and temperature were 6.0 and 323.15 K, respectively. The adsorption of uranyl ions was very fleet at the initial 1 h and then reached the adsorption equilibrium after 3 h. The data from the adsorption dynamics experiment could be commendably fitted by the pseudo-second-order model (R2 > 0.982), suggesting that chemisorption might be the rate-controlling mechanism. The Langmuir model (R2 > 0.995) manifested that the maximum adsorption capacity of uranyl ions on MWCNTs-CDP was boosted from 66.16 to 89.54 mg g-1 upon the change of temperature from 293.15 to 323.15 K. This result was better than that of some reported adsorbents. The thermodynamics analysis proved that the adsorption of uranyl ions on MWCNTs-CDP was a spontaneous process and an endothermic one. The adsorption mechanism of uranyl ions on MWCNTs-CDP was verified to be dominated by inner-sphere surface complexation. Our results indicated that MWCNTs-CDP can be utilized as a novel nanoadsorbent for highly effective removal of uranyl ions in actual uranyl-bearing effluents. © 2019 American Chemical Society.
语种：
英文
展开
Enhanced phytoremediation of uranium contaminated soil by artificially constructed plant community plots
作者：
Sha, Yin-hua;Hu, Nan;Wang, Yong-dong;Chen, Si-yu;Zou, Chao;...
期刊：
Journal of Environmental Radioactivity ,2019年208-209:106036 ISSN：0265-931X
通讯作者：
Ding, De-xin
作者机构：
[Chen, Si-yu; Dai, Zhong-ran; Zhang, Hui; Hu, Nan; Sha, Yin-hua; Ding, De-xin] Univ South China, Key Discipline Lab Natl Def Biotechnol Uranium Mi, Henyang 421001, Peoples R China.;[Zou, Chao; Wang, Yong-dong] Univ South China, Hunan Prov Key Lab Green Dev Technol Exetremely L, Henyang 421001, Peoples R China.;[Ding, De-xin] Univ South China, Key Discipline Lab Natl Def Biotechnol Uranium Mi, 28 West Changsheng Rd, Hengyang 421001, Hunan, Peoples R China.
通讯机构：
[Ding, De-xin] U;Univ South China, Key Discipline Lab Natl Def Biotechnol Uranium Mi, 28 West Changsheng Rd, Hengyang 421001, Hunan, Peoples R China.
关键词：
Bacteria;Bamboo;Bioaccumulation;Biochemistry;Bioremediation;Contamination;Efficiency;Enzyme activity;Oxalic acid;Soil moisture;Uranium;Contaminated soils;Greenhouse experiments;Microbial community structures;Phytoremediation;Plant communities;Plant growth promoting rhizobacteria;Remediation efficiency;Uptake and accumulations;Soil pollution;carboxylic acid;uranium;uranium;bacterium;bioaccumulation;biomass;bioremediation;community structure;microbial community;phytoremediation;plant community;rhizosphere;soil microorganism;soil pollution;soil remediation;uranium;Article;Bamboo willow;bioaccumulation;biomass;Burkholderia;chelation;community structure;controlled study;enzyme activity;Leptolyngbya;Macleaya cordata;microbial community;nonhuman;Paspalum;Paspalum scrobisculatum;phytoremediation;plant community;rhizosphere;soil pollution;willow;bioremediation;metabolism;soil pollutant;Bacteria (microorganisms);Burkholderia;Leptolyngbya;Macleaya cordata;Paspalum scrobiculatum;Rhizobiales;Salix;Salix sp.;Biodegradation, Environmental;Soil Pollutants, Radioactive;Uranium
摘要：
In order to develop an artificially constructed plant community plot for the enhanced phytoremediation of uranium contaminated soils, three uranium accumulators including Bamboo-willow (Salix sp.), Paspalum scrobiculatum linn and Macleaya cordata were used to construct four artificial plant community plots, and greenhouse experiments were conducted to investigate the bioaccumulation of uranium by the plants and the organic acid content, enzyme activity, and the change of microbial community structure in their rhizosphere soils. The transfer factor (TF) and the total bioaccumulation amount (TBA) of uranium were used to describe remediation efficiencies in this paper. It was found that their remediation efficiencies were in the order Bamboo-willow (Salix sp.)-Paspalum scrobiculatum linn-Macleaya cordata > Bamboo-willow (Salix sp.)-Macleaya cordata > Paspalum scrobiculatum linn-Macleaya cordata > Bamboo-willow (Salix sp.)-Paspalum scrobiculatum linn. The bioaccumulation amount of uranium by each plant in the Bamboo-willow (Salix sp.)-Paspalum scrobiculatum linn-Macleaya cordata community plot was significantly (P < 0.05) higher than that by its single population, the bioaccumulation amounts of uranium by Bamboo-willow (Salix sp.), Paspalum scrobiculatum linn and Macleaya cordata were 0.29, 0.32 and 2.19 mg/plant, respectively, and they were increased by 31.82%, 77.78% and 146.07%, respectively, and the transfer efficiencies by the plants were increased by 150%, 110% and 52.17%, respectively. The interaction between the plants' roots and the microorganisms in the rhizosphere soil of the Bamboo-willow (Salix sp.)-Paspalum scrobiculatum linn-Macleaya cordata community plot resulted in the high content of organic acids such as oxalic acid in the rhizosphere soil of the plant community plot, which was significantly (P < 0.05) higher than that of its single population. The chelation of the organic acids with uranium led to an increase in the proportion of exchangeable uranium in soil solution. In addition, Burkholderia, which is an iron-producing carrier bacterium and can increase the uptake and accumulation of uranium by plants, and Leptolyngbya, which is a plant growth promoting rhizobacteria and can increase the biomass of plants, emerged in the rhizosphere soil of the plant community plot. These may be the mechanisms by which the phytoremediation of the uranium contaminated soils was enhanced by the plant community plot. © 2019 Elsevier Ltd
语种：
英文
展开
Aspergillus niger changes the chemical form of uranium to decrease its biotoxicity, restricts its movement in plant and increase the growth of Syngonium podophyllum
作者：
Zou Chao;Sha Yin-hua;Ding De-xin;Li Guang-yue;Cui Yue-ting;...
期刊：
Chemosphere ,2019年224(Jun.):316-323 ISSN：0045-6535
通讯作者：
Wang Yong-dong
作者机构：
[Li Feng; Zou Chao; Dai Zhong-ran; Ding De-xin; Li Guang-yue; Hu Nan; Wang Yong-dong; Cui Yue-ting; Sun Jing; Sha Yin-hua; Zhang Hui] Univ South China, Key Discipline Lab Natl Def Biotechnol Uranium Mi, Heng Yang 421001, Hunan, Peoples R China.
通讯机构：
[Wang Yong-dong] U;Univ South China, Key Discipline Lab Natl Def Biotechnol Uranium Mi, Heng Yang 421001, Hunan, Peoples R China.
关键词：
Aspergillus niger;Combined remediation system;Phytoremediation;Syngonium podophyllum;Uranium stress
摘要：
Aspergillus niger (A. niger) and Syngonium podophyllum (S. podophyllum) have been used for wastewater treatment, and have exhibited a promising application in recent years. To determine the effects of A. niger on uranium enrichment and uranium stress antagonism of S. podophyllum, the S. podophyllum-A. niger combined system was established, and hydroponic remediation experiments were carried out with uranium-containing wastewater. The results revealed that the bioaugmentation of A. niger could increase the biomass of S. podophyllum by 5-7%, reverse the process of U(VI) reduction induced by S. podophyllum, and increase the bioconcentration factor (BCF) and translocation factor (TF) of S. podophyllum to uranium by 35-41 and 0.01-0.06, respectively, thereby improving the reduction of uranium in wastewater. Moreover, A. niger could promote the cell wall immobilization and the subcellular compartmentalization of uranium in the root of S. podophyllum, reduce the phytotoxicity of uranium entering root cells, and inhibit the calcium efflux from root cells, thereby withdrawing the stress of uranium on S. podophyllum. (C) 2019 Published by Elsevier Ltd.
语种：
英文
展开
Bioremediation of effluent from a uranium mill tailings repository in South China by Azolla–Anabaena
作者：
Huang Xinwei;Wang Yongdong;Hu Nan;Sha Yinhua;Ding Dexin*
期刊：
Journal of Radioanalytical and Nuclear Chemistry ,2018年317(2):739-746 ISSN：0236-5731
通讯作者：
Ding Dexin
作者机构：
[Wang Yongdong; Hu Nan; Ding Dexin; Sha Yinhua; Huang Xinwei] Univ South China, Key Discipline Lab Natl Def Biotechnol Uranium Mi, Hengyang 421001, Peoples R China.;[Wang Yongdong; Hu Nan; Ding Dexin; Sha Yinhua; Huang Xinwei] Hunan Prov Key Lab Green Dev Technol Extremely Lo, Hengyang 421001, Peoples R China.
通讯机构：
[Ding Dexin] U;[Ding Dexin] H;Univ South China, Key Discipline Lab Natl Def Biotechnol Uranium Mi, Hengyang 421001, Peoples R China.;Hunan Prov Key Lab Green Dev Technol Extremely Lo, Hengyang 421001, Peoples R China.
关键词：
cadmium;copper;iron;lead;manganese;nitrogen;phosphorus;sulfate;uranium;zinc;Anabaena;Article;Azolla;bioaccumulation;biomass;bioremediation;China;concentration (parameters);controlled study;effluent;hydroponics;mine tailings;nonhuman;photosynthesis;symbiont
摘要：
Hydroponic experiments were conducted on the removal of uranium, heavy metals and nutrients from the effluent of a uranium mill tailings repository in South China by Azolla–Anabaena. The plant–microbe symbiont was kept in the effluent for 30days, and it was found that U, Fe, Mn, Cu, Zn, Pb, Cd, total phosphorus (TP), total nitrogen (TN) and SO4 2− reduced by 87.6, 99.1, 98.8, 88.2, 91, 78.3, 77.5, 93.4, 98.7 and 76.7%, respectively. Specifically, the concentration of uranium reduced to 0.039mgL−1, which is below the limits of contaminants by the Department of Environmental Protection of China. The concentration of Fe, Cu, Zn, Pb, TP and TN in the effluent reached the quality standard for drinking water. The results showed that Azolla–Anabaena can be used for the bioremediation of the effluent from the uranium mill tailings repository. © 2018, Akadémiai Kiadó, Budapest, Hungary.
语种：
英文
展开
Adsorption and recovery of U(VI) from actual acid radioactive wastewater with low uranium concentration using thioacetamide modified activated carbon from liquorice residue
作者：
Tan, Yan;Li, Le;Zhang, Hui;Ding, Dexin* ;Dai, Zhongran;...
期刊：
Journal of Radioanalytical and Nuclear Chemistry ,2018年317(2):811-824 ISSN：0236-5731
通讯作者：
Ding, Dexin
作者机构：
[Ding, Dexin; Tan, Yan] Cent S Univ, Sch Resources & Safety Engn, Changsha 410083, Hunan, Peoples R China.;[Ding, Dexin; Tan, Yan; Zhang, Hui; Liu, Jinquan; Li, Le; Dai, Zhongran; Hu, Nan; Xue, Jinhua; Wang, Yongdong] Univ South China, Key Discipline Lab Natl Def Biotechnol Uranium Mi, Hengyang 421001, Peoples R China.;[Tan, Yan; Liu, Jinquan; Li, Le; Xue, Jinhua] Univ South China, Sch Publ Hlth, Hengyang 421001, Peoples R China.
通讯机构：
[Ding, Dexin] C;[Ding, Dexin] U;Cent S Univ, Sch Resources & Safety Engn, Changsha 410083, Hunan, Peoples R China.;Univ South China, Key Discipline Lab Natl Def Biotechnol Uranium Mi, Hengyang 421001, Peoples R China.
关键词：
activated carbon;thioacetamide;uranium;Article;chemical analysis;chemical reaction;correlation coefficient;energy dispersive X ray spectroscopy;Fourier transform infrared spectroscopy;Glycyrrhiza glabra;kinetics;polymerization;process optimization;radioactivity;temperature;thermodynamics;X ray photoemission spectroscopy;zeta potential
摘要：
In this paper, cheap liquorice residue was used to prepare activated carbon (AC), thioacetamide (TAA) was used to modify the AC, and the adsorption experiments were conducted in the simulated acid radioactive wastewater with low uranium concentration to study the adsorption behavior and mechanism for uranium by TAA modified AC (TAA–AC). The removal efficiency by TAA–AC was 92.1–98.2% from the 1mgL−1 uranium solution at pH 2–6. The adsorption equilibrium data were well fitted by Dubinin–Radushkevich model, and the maximum adsorption capacity was estimated to be 340mgg−1. TAA–AC showed an enhanced selectivity for uranium in the presence of competitive ions. Furthermore, the adsorption experiments were conducted in the actual acid radioactive wastewater with low uranium concentration from an in situ leach uranium mine. The high adsorption rate (98.3%) and selectivity (Kd = 3.78×104mLg−1) for uranium were observed in the actual acid radioactive wastewater, and the adsorption rate was found to maintain 96.2% over six cycles of adsorption–desorption. © 2018, Akadémiai Kiadó, Budapest, Hungary.
语种：
英文
展开
Synthesis and characterization of a novel core–shell magnetic nanocomposite via surface-initiated RAFT polymerization for highly efficient and selective adsorption of uranium(VI)
作者：
Dai, Zhongran;Zhang, Hui;Sui, Yang;Ding, Dexin* ;Hu, Nan;...
期刊：
Journal of Radioanalytical and Nuclear Chemistry ,2018年316(1):369-382 ISSN：0236-5731
通讯作者：
Ding, Dexin
作者机构：
[Ding, Dexin; Zhang, Hui; Li, Le; Dai, Zhongran; Hu, Nan; Wang, Yongdong] Univ South China, Key Discipline Lab Natl Def Biotechnol Uranium Mi, Hengyang 421001, Peoples R China.;[Sui, Yang] Hunan Taohuajiang Nucl Power Co Ltd, Yiyang 413000, Peoples R China.
通讯机构：
[Ding, Dexin] U;Univ South China, Key Discipline Lab Natl Def Biotechnol Uranium Mi, Hengyang 421001, Peoples R China.
关键词：
2 bromopropionyl bromide;adsorbent;amidoxime;aminopropyltriethoxysilane;chemical compound;ethyl potassium dithiocarbonate;magnetic nanoparticle;nanocomposite;nanoshell;polyacrylonitrile;tetraethoxysilane;ultrasmall superparamagnetic iron oxide;unclassified drug;uranium;adsorption kinetics;analytical parameters;Article;concentration (parameters);contact time;controlled study;covalent bond;desorption;infrared spectroscopy;isotherm;nanoanalysis;pH;polymerization;reversible addition fragmentation chain transfer;scanning electron microscopy;structure analysis;surface property;synthesis;temperature sensitivity;thermodynamics;thermogravimetry;transmission electron microscopy;vibrating sample magnetometer;X ray photoelectron spectroscopy
摘要：
In this work, the nanoparticles possessing a macro-initiator (MNPs@SCSOEt) were firstly obtained by surface-initiated RAFT polymerization. The structure of the nanocomposite was characterized by FT-IR, SEM, TEM, TGA, XPS and VSM. The effects of pH, contact time, initial uranium concentrations, coexisting ions and temperature on the U(VI) adsorption by MNPs@PAO were investigated in detail. The adsorption process was found to be in good agreement with pseudo-second order kinetic model and Langmuir adsorption isotherm model. The maximum adsorption capacity was estimated to be 216.45mg/g by fitting Langmuir model with the equilibrium data. The adsorption process was endothermic and spontaneous. In addition, the adsorption capacity of MNPs@PAO for U(VI) decreased slightly after five successive adsorption/desorption cycles. © 2018, Akadémiai Kiadó, Budapest, Hungary.
语种：
英文
展开
富集的硫酸盐还原菌沉积物生物还原地下水中U(Ⅵ)的实验研究
作者：
李殿鑫;胡南;黄超;丁德馨;李广悦;...
期刊：
化工学报 ,2018年69(8):3619-3625 ISSN：0438-1157
通讯作者：
Ding, Dexin(dingdxzzz@163.com)
作者机构：
[李殿鑫; 胡南; 黄超; 丁德馨; 李广悦; 王永东] Key Discipline Laboratory for National Defence for Biotechnology in Uranium Mining and Hydrometallurgy, University of South China, Hengyang;Hunan;421001, China;Hunan Province Key Laboratory of Green Development Technology for Extremely Low Grade Uranium Resources, University of South China, Hengyang;[李殿鑫; 胡南; 黄超; 丁德馨; 李广悦; 王永东] Hunan
关键词：
废水;沉积物;还原;修复
摘要：
通过添加富集得到的含有丰富的硫酸盐还原菌的沉积物到沉积物-地下水微模型中,并添加乙醇作为碳源,分别与接种硫酸盐还原菌并添加碳源组和仅添加碳源组相比较,研究富集的硫酸盐还原菌沉积物对地下水中U(Ⅵ)还原的作用。结果表明,添加硫酸盐还原菌沉积物组、接种硫酸盐还原菌组和对照组中的铀浓度分别在第19、22和28 d下降至GB 23727—2009规定的0.05 mg·L~(–1)排放标准以下。各组沉积物中具有还原U(Ⅵ)功能的微生物群落的多样性差异较小。添加硫酸盐还原菌沉积物组、接种硫酸盐还原菌组和对照组的沉积物中具有还原U(Ⅵ)功能的微生物群落的丰度分别为35.3%、32.5%和13.1%。由此可见,富集的硫酸盐还原菌沉积物增加了微模型中具有还原U(Ⅵ)功能的微生物群落的丰度,从而促进了U(Ⅵ)的还原。
语种：
中文
展开
Construction of recombinant bioleaching bacteria Thiobacillus ferrooxidans with fluoride-resistant activity
作者：
Yun-Chang Cao;Hong-Bo Wen;Nan Hu;Yong-Dong Wang;Gaung-Yue Li;...
期刊：
American Journal of Biochemistry and Biotechnology ,2018年14(2):145-153 ISSN：1553-3468
通讯作者：
Ding, De-Xin(dingdxzzz@163.com)
作者机构：
[Yun-Chang Cao; Nan Hu; Yong-Dong Wang; Gaung-Yue Li; De-Xin Ding] Key Discipline Laboratory for National Defense for Biotechnology in Uranium Mining and Hydrometallurgy, University of South China, 28 West Changsheng Rd, Hengyang;Hunan;421001, China;[Hong-Bo Wen] Department of Biochemistry and Molecular Biology, School of Pharmaceutical and Biological Science, University of South China, 28 West Changsheng Rd, Hengyang;[Yun-Chang Cao; Hong-Bo Wen; Nan Hu; Yong-Dong Wang; Gaung-Yue Li; De-Xin Ding] Hunan
通讯机构：
[Ding, D.-X.] K;Key Discipline Laboratory for National Defense for Biotechnology in Uranium Mining and Hydrometallurgy, 28 West Changsheng Rd, China
关键词：
Bioleaching bacteria;Conjugation transfer;Flr-4 gene;Fluoride resistance;Genetic modification;Thiobacillus ferrooxidans
摘要：
Thiobacillus ferrooxidans is an important bioleaching bacterium, widely used in leaching, recovery of low-grade metals and environmental bioremediation. In bio-metallurgy industry, fluoride existing in some hard rock uranium deposits in south China severely affects the bacteria viability and inhibit leaching reproduction. In this study, the flr-4 gene that has strong resistance to fluorine ion in Caenorhabditis elegans, was cloned into pET30a vector and expressed in E. coli BL21. the ability of fluoride resistance in E. coli was increased obviously. To increase the fluorideresistance of bioleaching bacterium T. ferrooxidans strain 1 (T.f1), the flr-4 shuttle recombinant plasmid pJRD215-flr-4 was constructed and transferred into T.f1 by conjugation. pJRD215-flr-4 was stable in T.f1 with more than 70% retention after 50 generations. Recombinant T.f1 was tolerant to fluorine ions and grew well under fluoride (F-) stress especially at F- concentrations ranging from 10 mg/L to 60 mg/L. © 2018 Yun-Chang Cao, Hong-Bo Wen, 1Nan Hu, Yong-Dong Wang, Guang-Yue Li and De-Xin Ding.
语种：
英文
展开
Transformation of uranium species in soil during redox oscillations
作者：
Fu, Haiying;Zhang, Hui;Sui, Yang;Hu, Nan;Ding, Dexin* ;...
期刊：
Chemosphere ,2018年208(Oct.):846-853 ISSN：0045-6535
通讯作者：
Ding, Dexin
作者机构：
[Ding, Dexin; Zhang, Hui; Ye, Yongjun; Li, Guangyue; Dai, Zhongran; Hu, Nan; Wang, Yongdong; Fu, Haiying] Univ South China, Key Discipline Lab Natl Def Biotechnol Uranium Mi, Hengyang 421001, Peoples R China.;[Ding, Dexin; Ye, Yongjun; Sui, Yang; Fu, Haiying] Univ South China, Sch Environm & Safety Engn, Hengyang 421001, Hunan, Peoples R China.;[Sui, Yang] Hunan Taohuajiang Nucl Power Co Ltd, Yiyang 413000, Peoples R China.
通讯机构：
[Ding, Dexin] U;Univ South China, Key Discipline Lab Natl Def Biotechnol Uranium Mi, Hengyang 421001, Peoples R China.
关键词：
Redox cycling;Uranium speciation;Stable U(IV);Chemical extraction;Paddy soil
摘要：
Redox oscillation is commonly found in near-surface environment, where soils are often polluted with many redox active contaminants, including uranium (U). In order to investigate the transformation of U species in near-surface soil under redox oscillations conditions, redox oscillations and reduction experiments were performed, biogeochemical parameters and native microbial community composition were monitored, main elements on the surface of solid-phase were analyzed by XPS, and labile U(IV) species and stable U(IV) species in solid-phase were provisionally defined using an anoxic 1 M sodium bicarbonate extraction. It was found that redox oscillations slightly increased the water-soluble U but significantly increased the stable U(IV) species (P < 0.05) in soil. In reduction experiment, there was upper limit value for percentage of stable U(IV) species, and the labile U(IV) species could not transform to stable U(IV) species in a short period of time under reduction conditions. The redox transition of Fe enriched on the surface of soil and the conversion of microbial community composition played a major role in speciation transformation of U under redox oscillations conditions. In addition, sequential extraction revealed that the increase of stable U(IV) species content reflected the U speciation transition from acetate extract to more recalcitrant hydroxylamine extract. The finding provides a potential method for improving the stability of U when bio-reduction is used to remediate the U-contaminated soils. (C) 2018 Elsevier Ltd. All rights reserved.
语种：
英文
展开
Scavenging of U(VI) from Impregnated Water at Uranium Tailings Repository by Tripolyphosphate Intercalated Layered Double Hydroxides
作者：
Zhang, Hui;Dai, Zhongran;Sui, Yang;Wang, Nieying;Fu, Haiying;...
期刊：
Industrial & Engineering Chemistry Research ,2018年57(50):17318-17327 ISSN：0888-5885
通讯作者：
Ding, Dexin
作者机构：
[Ding, Dexin; Zhang, Hui; Li, Le; Dai, Zhongran; Wang, Nieying; Li, Guangyue; Hu, Nan; Wang, Yongdong; Fu, Haiying] Univ South China, Key Discipline Lab Natl Def Biotechnol Uranium Mi, Hengyang 421001, Peoples R China.;[Ding, Dexin; Zhang, Hui; Li, Le; Dai, Zhongran; Wang, Nieying; Li, Guangyue; Hu, Nan; Wang, Yongdong; Fu, Haiying] Hunan Prov Key Lab Green Dev Technol Extremely Lo, Hengyang 421001, Peoples R China.;[Sui, Yang; Fu, Haiying] Univ South China, Sch Nucl & Technol, Hengyang 421001, Hunan, Peoples R China.
通讯机构：
[Ding, Dexin] U;[Ding, Dexin] H;Univ South China, Key Discipline Lab Natl Def Biotechnol Uranium Mi, Hengyang 421001, Peoples R China.;Hunan Prov Key Lab Green Dev Technol Extremely Lo, Hengyang 421001, Peoples R China.
摘要：
The impregnated water at a uranium tailings repository has characteristics that its uranium concentration is low and it contains many other interfering ions. In order to develop an efficient adsorbent for such wastewater, Mg-Al layered double hydroxide (Mg-Al-NO3-LDH) and tripolyphosphate intercalated LDH (TPP-LDH-1 and TPP-LDH-2) were synthesized by an anion exchange method and characterized by using multiple analysis techniques, and their behavior and mechanism for U(VI) removal from aqueous solutions were investigated. It is found that their adsorption capacities for U(VI) follow the order Mg-Al-NO3-LDH < TPP-LDH-1 < TPP-LDH-2. The maximum sorption capacities of Mg-Al-NO3-LDH, TPP-LDH-1, and TPP-LDH-2 for U(VI) at pH 5.0 and 298.15 K derived from the Langmuir model are 201.27, 399.01, and 501.76 mg/g, respectively. In addition, tripolyphosphate intercalated LDH show a higher sorption selectivity toward U(VI) over other metal cations and anions. X-ray photoelectron spectroscopy (XPS) and Fourier transform-infrared spectroscopy (FT-IR) characterizations suggest that the higher adsorption capacity and sorption selectivity of TPP-LDH-2 are probably due to the inner-sphere surface complexes resulting from the phosphate groups (P=O, -PO3) with U(VI). The applicability of TPP-LDH-2 for scavenging of U(VI) from the impregnated water at a uranium tailings repository in South China was further evaluated. It is found that TPP-LDH-2 shows excellent removal efficiency for U(VI). The results indicate that tripolyphosphate intercalated LDH is a promising adsorbent for scavenging of U(VI) from the impregnated water at the uranium tailings repository. Copyright © 2018 American Chemical Society.
语种：
英文
展开
鱼腥藻在满江红-鱼腥藻共生体系去除水中铀时的作用
作者：
胡南;丁德馨;赵维超;胡劲松;谭煜健;...
期刊：
环境科学学报 ,2017年37(1):162-168 ISSN：0253-2468
通讯作者：
Ding, D.
作者机构：
[胡南; 丁德馨; 赵维超; 胡劲松; 谭煜健; 李乐; 郑济芳; 王永东] Key Discipline Laboratory for National Defense for Biotechnology in Uranium Mining and Hydrometallurgy, University of South China, Hengyang, 421001, China
通讯机构：
Key Discipline Laboratory for National Defense for Biotechnology in Uranium Mining and Hydrometallurgy, University of South China, Hengyang, China
关键词：
铀;满江红;共生体系;鱼腥藻
摘要：
通过分离有藻满江红中的鱼腥藻,获得无藻满江红和鱼腥藻.采用水培试验的方法分别研究了无藻满江红、有藻满江红和鱼腥藻对水中铀的去除行为,并采用红外光谱技术分析了它们富集铀前后化学基团的变化.结果表明,对于初始浓度分别为2.5和5.0 mg·L-1的铀溶液,在有藻满江红的作用下,分别经过27和36 d生物富集后浓度能降低至GB 23727-2009规定的0.05 mg·L-1排放标准以下,而在无藻满江红和鱼腥藻的作用下,铀浓度无法达到排放标准.相对于无藻满江红,鱼腥藻提高了有藻满江红对水中铀的富集量、富集系数及对铀的抗胁迫能力,从而提高了有藻满江红对水中铀的去除效率.红外分析表明,在富集铀后,与无藻满江红相比,有藻满江红体内出现了芳环和醇类或苷类化合物,而这些新的物质是鱼腥藻在富集铀的过程中产生的,其可能促进了有藻满江红对铀的富集.
语种：
中文
展开
博落回对不同化学形态铀的富集特征
作者：
稂涛;胡南;张辉;李广悦;王永东;...
期刊：
环境科学研究 ,2017年30(8):1238-1245 ISSN：1001-6929
通讯作者：
Ding, D.
作者机构：
[稂涛; 胡南; 张辉; 李广悦; 王永东; 丁德馨] 南华大学, 铀矿冶生物技术国防重点学科实验室;[稂涛; 胡南; 张辉; 李广悦; 王永东; 丁德馨] 极贫铀资源绿色开发技术湖南省重点实验室, 湖南, 衡阳, 421001
关键词：
博落回;铀的化学形态;水培试验;富集特征;转移
摘要：
为了研究陆生植物博落回 (Macleaya Cordata)对不同化学形态铀的富集特征,采用Visual MINTEQ地球化学平衡软件设计了五种含不同化学形态铀〔UO_2~(2 +)、CaUO_2 (CO_3 )_3~(2 -)、UO_2Cit~-、 (UO_2 )_2 (EDTA)_2~(4 -)和UO_2HPO_4〕的培养液,开展水培试验.博落回在这五种培养液中分别培养1、5、10、15、20和25 d后,测定其株高、根长和干质量,并用电感耦合等离子体质谱仪 (ICP-MS)测定其地上部分和根部的w(铀).结果表明:在不同化学形态铀胁迫下,博落回株高无显著差异,UO_2HPO_4可促进博落回根的生长,而 (UO_2)_2 (EDTA)_2~(4 -)降低了博落回的干质量.并且,博落回根部对不同化学形态铀的富集能力大小顺序为UO_2~(2 +) > UO_2HPO_4 > CaUO_2 (CO_3 )_3~(2 -) > UO_2Cit~- > (UO_2)_2 (EDTA)_2~(4 -),博落回地上部分对不同化学形态铀的富集能力大小顺序为UO_2Cit~- > (UO_2)_2 (EDTA)_2~(4 -) > UO_2~(2 +) > CaUO_2 (CO_3 )_3~(2 -) > UO_2HPO_4.此外,博落回根部对UO_2~(2 +)的富集能力很高,但地上部分很低.添加柠檬酸,培养液中铀的主要化学形态为UO_2Cit~-,并且在100 mg/L铀的胁迫下,博落回对UO_2Cit~-的生物富集系数和转移系数分别达到0. 09和8. 53.因此,要提高博落回对铀污染土壤中铀的富集和转移,可添加柠檬酸,促使土壤中铀的形态以UO_2Cit~-为主,同时要降低土壤中碳酸盐和磷酸盐的含量.
语种：
中文
展开
New Amidoxime-Based Material TMP-g-AO for Uranium Adsorption under Seawater Conditions
作者：
Zeng, Jiayun;Zhang, Hui;Sui, Yang;Hu, Nan;Ding, Dexin* ;...
期刊：
Industrial & Engineering Chemistry Research ,2017年56(17):5021-5032 ISSN：0888-5885
通讯作者：
Ding, Dexin
作者机构：
[Ding, Dexin; Zhang, Hui; Zeng, Jiayun; Hu, Nan; Wang, Fang; Xue, Jinhua; Wang, Yongdong] Univ South China, Key Discipline Lab Natl Def Biotechnol Uranium Mi, Hengyang 421001, Peoples R China.;[Sui, Yang] Hunan Taohuajiang Nucl Power Co Ltd, Yiyang 413000, Peoples R China.
通讯机构：
[Ding, Dexin] U;Univ South China, Key Discipline Lab Natl Def Biotechnol Uranium Mi, Hengyang 421001, Peoples R China.
摘要：
A novel amidoxime-based adsorbent of titanium-molybdopyrophosphate-g-amidoxime (TMP-g-AO) was prepared by chemical coprecipitation and subsequent chemical modifications. The successful grafting of acrylonitrile group and the subsequent conversion of acrylonitrile group to amidoxime groups were characterized by scanning electron microscopy-energy dispersive spectroscopy, Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, N2-BET, and thermal analysis. The adsorption behavior of uranium(VI) on TMP-g-AO was investigated for low concentration uranium solution by batch experiments at a fixed pH of 8.2 ± 0.1. It is found that the adsorption rate of uranium from solution was 99.77% when the uranium concentration was 42.3 μg/L, pH = 8.2 ± 0.1, temperature = 298.15 K, and the adsorbent dosage = 0.05 g. The kinetic data follow the pseudo-second-order model, and adsorption equilibrium data fit the Langmuir model well. The thermodynamics parameters (ΔS, ΔH, and ΔG) indicate that the adsorption process is spontaneous and endothermic. The functional TMP-g-AO adsorbent exhibits good selectivity and affinity for uranium ions under coexisting multimetal ions except for Fe3+ and Co2+. Desorption was performed, and the adsorption rate of uranium by TMP-g-AO only decreased 1.42% after five consecutive adsorption-desorption cycles. In order to evaluate the potential application of TMP-g-AO for uranium extraction from seawater, the experiments on adsorption of uranium(VI) from natural seawater and the uranium-doped seawater were conducted, and the adsorbent exhibited a high adsorption rate of uranium(VI). The results show that TMP-g-AO could be a very promising adsorbent for uranium extraction from seawater. © 2017 American Chemical Society.
语种：
英文
展开
Role of water contents on microwave roasting of gold bearing high arsenic sulphide concentrate
作者：
Hu, Nan;Chen, Wei;Ding, De-xin* ;Li, Feng;Dai, Zhong-ran;...
期刊：
International Journal of Mineral Processing ,2017年161:72-77 ISSN：0301-7516
通讯作者：
Ding, De-xin
作者机构：
[Chen, Wei; Dai, Zhong-ran; Li, Guang-yue; Zhang, Hui; Li, Feng; Hu, Nan; Ding, De-xin; Wang, Yong-dong; Lang, Tao] Univ South China, Key Discipline Lab Natl Def Biotechnol Uranium Mi, Hengyang 421001, Peoples R China.;[Hu, Nan; Ding, De-xin] Hunan Prov Key Lab Green Dev Technol Extremely Lo, Hengyang 421001, Peoples R China.
通讯机构：
[Ding, De-xin] U;Univ South China, Key Discipline Lab Natl Def Biotechnol Uranium Mi, Hengyang 421001, Peoples R China.
关键词：
Arsenic;Calcination;Gold;Leaching;Microwaves;Sulfur;Sulfur compounds;Water content;Arsenic sulphide;Gold bearings;Gold concentrate;Influence of water;Leaching rates;Removal rate;Gold deposits
摘要：
A new technology for enhancing microwave roasting of gold bearing high arsenic sulphide concentrate with various water contents was proposed. The influence of water content and roasting time on microwave roasting of gold concentrate was investigated, and the mechanism of microwave roasting of gold bearing high arsenic sulphide concentrate with various water contents was analyzed. The results show that the removal rate of sulfur and iodide/iodine leaching rate of gold are mainly dependent on water content. The removal rate of sulfur and the leaching rate of gold reaches 87.95% and 75.08%, respectively, under the conditions of water content of 9% with microwave roasting for 30 min. After the dried concentrate sample and the wetted concentrate sample with 9% water content were roasted in the microwave oven for 60 min, the latter was found by SEM to be more porous than former, its specific surface area was found to increase from 25.6 to 32.7 m(2)/g. (C) 2017 Elsevier B.V. All rights reserved.
语种：
英文
展开
Influence of bicarbonate on the abundance of microbial communities capable of reducing U(VI) in groundwater
作者：
Li, Dianxin;Hu, Nan;Sui, Yang;Ding, Dexin* ;Li, Ke;...
期刊：
RSC Advances ,2017年7(78):49745-49752 ISSN：2046-2069
通讯作者：
Ding, Dexin
作者机构：
[Ding, Dexin; Sui, Yang; Li, Dianxin; Li, Ke; Li, Guangyue; Hu, Nan; Wang, Yongdong] Univ South China, Key Discipline Lab Natl Def Biotechnol Uranium Mi, Hengyang 421001, Peoples R China.
通讯机构：
[Ding, Dexin] U;Univ South China, Key Discipline Lab Natl Def Biotechnol Uranium Mi, Hengyang 421001, Peoples R China.
摘要：
In order to investigate the influence of different concentrations of bicarbonate on the abundance of microbial communities capable of reducing U(vi) in groundwater, 7 groups of experiments incubated with lactate and amended with 7 initial concentrations of bicarbonate (0, 5, 10, 15, 20, 25, and 30 mM), respectively, were conducted. It was found that U(vi) concentration failed to decrease below the Chinese uranium wastewater discharge standard (0.05 mg L<sup>-1</sup>) when the initial bicarbonate concentration was higher than 10 mM. During the nitrate reduction, the abundance of nitrate reduction bacteria (NRB) was 22% in B0, while the abundance of NRB was 3.4% in B10 and B15. The main functional microbial community in B0 was NRB Brevundimonas, whose abundance was over 19%. During the U(vi), sulfate, and Fe(iii) reduction, the abundance of sulfate and Fe reduction bacteria (SRB and FRB) was 44% in B0, while the abundance of SRB and FRB were 26% and 27% in B10 and B15, respectively. The main functional microbial communities capable of reducing U(vi) in B0 were Cellulomonas, Desulfosporosinus, and Desulfovibrio, whose abundance was as high as 36%. The main microbial community capable of reducing U(vi) in B10 was Desulfitobacterium, and its abundance was higher than 14%. The main functional microbial communities capable of reducing U(vi) in B15 were Desulfovibrio and Geobacter, and their abundance was over 13%. The overall experimental results indicate that the higher initial bicarbonate concentration leads to the lower abundance of microbial communities capable of reducing U(vi) in groundwater. ©2017 The Royal Society of Chemistry.
语种：
英文
展开
Construction of the Syngonium podophyllum-Pseudomonas sp XNN8 Symbiotic Purification System and Investigation of Its Capability of Remediating Uranium Wastewater
作者：
Deng, Qin-wen;Wang, Yong-dong;Ding, De-xin* ;Hu, Nan;Sun, Jing;...
期刊：
Environmental Science and Pollution Research ,2017年24(6):5134-5143 ISSN：0944-1344
通讯作者：
Ding, De-xin
作者机构：
[He, Jia-dong; Hu, Nan; Sun, Jing; Deng, Qin-wen; Ding, De-xin; Xu, Fei; Wang, Yong-dong] Univ South China, Key Discipline Lab Natl Def Biotechnol Uranium Mi, 28 West Changsheng Rd, Hengyang 421001, Hunan, Peoples R China.
通讯机构：
[Ding, De-xin] U;Univ South China, Key Discipline Lab Natl Def Biotechnol Uranium Mi, 28 West Changsheng Rd, Hengyang 421001, Hunan, Peoples R China.
关键词：
Bioremediation;Phytoremediation;Plant-endophyte symbiotic system;Uranium wastewater
摘要：
The endophyte Pseudomonas sp. XNN8 was separated from Typha orientalis which can secrete indole-3-acetic acid and 1-aminocyclopropane-1-carboxylate deaminase and siderophores and has strong resistance to uranium it was then colonized in the Syngonium podophyllum; and the S. podophyllum-Pseudomonas sp. XNN8 symbiotic purification system (SPPSPS) for uranium-containing wastewater was constructed. Afterwards, the hydroponic experiments to remove uranium from uranium-containing wastewater by the SPPSPS were conducted. After 24 days of treatment, the uranium concentrations of the wastewater samples with uranium concentrations between 0.5 and 5.0 mg/L were lowered to below 0.05 mg/L. Furthermore, the uranium in the plants was assayed using Fourier transform infrared spectroscopy (FTIR) and extended X-ray absorption fine structure (EXAFS) spectroscopy. The Pseudomonas sp. XNN8 was found to generate substantial organic groups in the roots of the Syngonium podophyllum, which could improve the complexing capability of S. podophyllum for uranium. The uranium in the roots of S. podophyllum was found to be the uranyl phosphate (47.4 %) and uranyl acetate (52.6 %).
语种：
英文
展开
海藻酸钠-聚丙烯酰胺固定氧化亚铁硫杆菌技术的研究
作者：
廖泽君;蔡萍莉;王永东;史文革;邹延
期刊：
中国矿业 ,2016年25(3):150-153,157 ISSN：1004-4051
作者机构：
南华大学核资源工程学院;[王永东] 铀矿冶生物技术国防重点学科实验室;南华大学城市建设学院;[蔡萍莉; 邹延; 廖泽君; 史文革] 南华大学
关键词：
固定化;氧化亚铁硫杆菌;海藻酸钠;聚丙烯酰胺;氧化;稳定性
摘要：
以海藻酸钠(SA)、聚丙烯酰胺(HPAM)为复合载体,加入聚乙二醇(PEG)为致孔剂,对氧化亚铁硫杆菌进行固定化研究.实验考察了SA、HPAM、PEG的浓度对SA-HPAM凝胶微球的机械强度及固定化细胞的氧化活性的影响,确定了三种材料的最佳浓度:SA为2.5%,HPAM为0.4%,PEG为2%,此条件下固定化细胞对Fe2+的最大氧化速率可达2.853 g·(L·h)-1,24h后Fe2+的氧化率在98%以上,固定化细胞目前重复使用了15次,并在3℃冰箱中存放两个月后,依然具有很好的氧化活性,表明S A-HPAM固定化的氧化亚铁硫杆菌具有较好的稳定性.
语种：
中文
展开
An experimental study on the synergistic effects between Azolla and Anabaena in removal of uranium from solutions by Azolla–anabaena symbiotic system
作者：
Pan, Changchun;Hu, Nan;Ding, Dexin* ;Hu, Jinsong;Li, Guangyue;...
期刊：
Journal of Radioanalytical and Nuclear Chemistry ,2016年307(1):385-394 ISSN：0236-5731
通讯作者：
Ding, Dexin
作者机构：
[Ding, Dexin; Pan, Changchun; Li, Guangyue; Hu, Nan; Hu, Jinsong; Wang, Yongdong] Univ South China, Key Discipline Lab Natl Def Biotechnol Uranium Mi, 28 West Changsheng Rd, Hengyang 421001, Hunan, Peoples R China.
通讯机构：
[Ding, Dexin] U;Univ South China, Key Discipline Lab Natl Def Biotechnol Uranium Mi, 28 West Changsheng Rd, Hengyang 421001, Hunan, Peoples R China.
关键词：
catalase;peroxidase;superoxide dismutase;uranium;adsorption;Anabaena;Article;Azolla;bacterial growth;bioaccumulation;China;concentration (parameters);controlled study;enzyme activity;enzyme synthesis;experimental study;growth inhibition;heavy metal removal;intraspecific competition;metabolic disorder;nonhuman;plant growth;plant stress;protein content;symbiosis;waste water
摘要：
In order to study the synergistic effects between Azolla and Anabaena in the removal of uranium from wastewater by Azolla–anabaena symbiotic system (AASS), the Azolla without Anabaena (AWA) was separated from the AASS. The removal of uranium by the AWA and the AASS, the growth inhibition, the solution protein contents, the superoxide dismutase, catalase and peroxidase activities under the stress of different uranium solutions were measured and analyzed. The results show that there were synergistic effects between Azolla and Anabaena. © 2015, Akadémiai Kiadó, Budapest, Hungary.
语种：
英文
展开
An experimental study on the inhibitory effect of high concentration bicarbonate on the reduction of U(VI) in groundwater by functionalized indigenous microbial communities
作者：
Li, Dianxin;Hu, Nan;Ding, Dexin* ;Li, Shimi;Li, Guangyue;...
期刊：
Journal of Radioanalytical and Nuclear Chemistry ,2016年307(2):1011-1019 ISSN：0236-5731
通讯作者：
Ding, Dexin
作者机构：
[Ding, Dexin; Li, Shimi; Li, Dianxin; Li, Guangyue; Hu, Nan; Wang, Yongdong] Univ South China, Key Discipline Lab Natl Def Biotechnol Uranium Mi, Hengyang 421001, Peoples R China.
通讯机构：
[Ding, Dexin] U;Univ South China, Key Discipline Lab Natl Def Biotechnol Uranium Mi, Hengyang 421001, Peoples R China.
关键词：
bicarbonate;ground water;nitrate;sulfate;uranium;Acidaminococcaceae;Article;bacterial count;bacterium;bioremediation;Cellulomonadaceae;chemical oxygen demand;concentration (parameters);controlled study;Desulfovibrionaceae;experimental study;microbial community;microcosm;nonhuman;Peptococcaceae;pH
摘要：
The anaerobic microcosms amended with 30mM bicarbonate and without bicarbonate were established, respectively, and the reduction of U(VI) in the microcosms by functionalized indigenous microbial communities was investigated. Results of the chemical extraction and XANES analysis showed that the proportions of U(IV) in the microcosms amended with bicarbonate were 10% lower than without bicarbonate at day 46. The amount of Cellulomonadaceae, Desulfovibrionaceae, Peptococcaceae and Veillonellaceae amended with bicarbonate was lower than without bicarbonate, so the reduction of U(VI) was less. The experimental results show that the high concentration bicarbonate has a significantly inhibitory effect on the reduction of U(VI). © 2015, Akadémiai Kiadó, Budapest, Hungary.
语种：
英文
展开
