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
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产脲酶芽胞杆菌的微波诱变育种
作者：
杜康;李广悦;丁德馨;刁宁宁;王永东;...
期刊：
微生物学杂志 ,2016年36(3):20-23 ISSN：1005-7021
作者机构：
[杜康; 李广悦; 丁德馨; 刁宁宁; 王永东; 胡南] 南华大学, 铀矿冶生物技术国防重点学科实验室, 湖南, 衡阳, 421001
关键词：
微波育种;巴氏芽胞杆菌;尿素分解;微生物诱导碳酸钙沉淀(MICP)
摘要：
巴氏芽胞杆菌是目前微生物诱导碳酸钙沉淀(MICP)方法中应用最为热门的一种细菌。为提高巴氏芽胞杆菌尿素分解以及矿化能力,以巴氏芽胞杆菌YB-B为出发菌株,采用微波诱变育种技术,通过诱变菌株特性筛选及其遗传稳定性检测,成功选育出2株突变菌株YB-3和YB-4。与出发菌株相比,诱变菌株尿素分解能力较原菌株提高1.5倍左右,矿化能力提高114%。诱变菌株具有生长速度快,环境适应性强,矿化能力高等优点,这为MICP更广层次的应用奠定了坚实的基础。
语种：
中文
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Selective removal of U(VI) from low concentration wastewater by functionalized HKUST-1@H3PW12O40
作者：
Zhang, Hui;Xue, Jinhua;Hu, Nan;Sun, Jing;Ding, Dexin* ;...
期刊：
Journal of Radioanalytical and Nuclear Chemistry ,2016年308(3):865-875 ISSN：0236-5731
通讯作者：
Ding, Dexin
作者机构：
[Ding, Dexin; Zhang, Hui; Li, Le; Hu, Nan; Sun, Jing; Xue, Jinhua; 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：
adsorbent;metal organic framework;uranium;adsorption kinetics;Article;concentration (parameters);contact time;controlled study;heavy metal removal;infrared spectroscopy;pH;physical parameters;scanning electron microscopy;temperature sensitivity;thermodynamics;X ray diffraction
摘要：
The adsorption of U(VI) from low concentration solution by HKUST-1@H3PW12O40 was studied as a function of various experimental parameters including pH, interfering ions, contact time, initial uranium concentration and temperature by batch experiments. Equilibrium data were found to fit with Langmuir isotherm model better than Freundlich isotherm model. The kinetic adsorption was fitted by the pseudo-second-order model well. Thermodynamic data from the adsorption experiments indicate that adsorption process is spontaneous and endothermic. HKUST-1@H3PW12O40 can selectively adsorb U(VI) from multi-metal ion solutions and the adsorption capacity of HKUST-1@H3PW12O40 don’t decrease significantly after three cycles of desorption-reuse. The results show that HKUST-1@H3PW12O40 is suitable for removal of U(VI) from low concentration solutions. © 2015, Akadémiai Kiadó, Budapest, Hungary.
语种：
英文
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具有核特色的矿物资源工程专业卓越人才培养模式探析
作者：
喻清;曾晟;杨月平;王永东;王富林;...
期刊：
教育教学论坛 ,2016年(8):51-52 ISSN：1674-9324
作者机构：
南华大学核资源工程学院,湖南衡阳,421001;[马艾阳; 李俊哲; 王永东; 文霞; 杨月平; 喻清; 王富林; 曾晟] 南华大学
关键词：
矿物资源工程;人才培养;卓越工程师
摘要：
卓越工程师人才培养是国家培养新型工业化人才的重要举措,是高校教育教学改革的重要方向.南华大学矿物资源工程专业,在分析当前人才培养过程中存在的问题的基础上,在人才培养模式、师资队伍建设、实践教学改革、校企合作等方面,进行了卓越工程师人才培养模式的改革与实践,由此制订满足矿物资源工程专业卓越工程师知识、能力和素质要求的培养模式.
语种：
中文
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Developmental toxicity and oxidative stress induced by gamma irradiation in zebrafish embryos
作者：
Hu, Miao;Hu, Nan;Ding, Dexin* ;Zhao, Weichao;Feng, Yongfu;...
期刊：
Radiation and Environmental Biophysics ,2016年55(4):441-450 ISSN：0301-634X
通讯作者：
Ding, Dexin
作者机构：
[Ding, Dexin; Hu, Miao; Zhang, Hui; Feng, Yongfu; Li, Guangyue; Hu, Nan; Wang, Yongdong; Zhao, Weichao] Univ South China, Key Discipline Lab Natl Def Biotechnol Uranium Mi, Hengyang 421001, Hunan, Peoples R China.
通讯机构：
[Ding, Dexin] U;Univ South China, Key Discipline Lab Natl Def Biotechnol Uranium Mi, Hengyang 421001, Hunan, Peoples R China.
关键词：
Gamma irradiation;Zebrafish embryo;Oxidative stress;Developmental toxicity;Biomarker
摘要：
This study aimed to evaluate the biological effects of gamma irradiation on zebrafish embryos. Different doses of gamma rays (0.01, 0.05, 0.1, 0.5 and 1 Gy) were used to irradiate zebrafish embryos at three developmental stages (stage 1, 6 h post-fertilization (hpf); stage 2, 12 hpf; stage three, 24 hpf), respectively. The survival, malformation and hatching rates of the zebrafish embryos were measured at the morphological endpoint of 96 hpf. The activities of superoxide dismutase (SOD), catalase (CAT), glutathione reductase (GR), glutathione peroxidase (GPx) and glutathione S-transferase (GST) were assayed. Morphology analysis showed that gamma irradiation inhibited hatching and induced developmental toxicity in a dose-dependent manner. Interestingly, after irradiation the malformation rate changed not only in a dose-dependent manner but also in a developmental stage-dependent manner, indicating that the zebrafish embryos at stage 1 were more sensitive to gamma rays than those at other stages. Biochemical analysis showed that gamma irradiation modulated the activities of antioxidant enzymes in a dose-dependent manner. A linear relationship was found between GPx activity and irradiation dose in 0.1–1 Gy group, and GPx was a suitable biomarker for gamma irradiation in the dose range from 0.1 to 1 Gy. Furthermore, the activities of SOD, CAT, GR and GPx of the zebrafish embryos at stage 3 were found to be much higher than those at other stages, indicating that the zebrafish embryos at stage 3 had a greater ability to protect against gamma rays than those at other stages, and thus the activities of antioxidant enzymes changed in a developmental stage-dependent manner.
语种：
英文
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高碱性铜尾矿的黑曲霉生物浸出
作者：
刁宁宁;李广悦;王永东;杜康
期刊：
过程工程学报 ,2015年15(1):132-136 ISSN：1009-606X
通讯作者：
Li, G.-Y.
作者机构：
南华大学核资源工程学院,湖南衡阳421001;南华大学铀矿冶生物技术国防重点学科实验室,湖南衡阳421001;[杜康; 李广悦; 刁宁宁; 王永东] School of Nuclear Resources Engineering, University of South China, Hengyang, Hunan 421001, China, Key Discipline Laboratory for National Defense of Biotechnology in Uranium Mining and Hydrometallurgy, University of South China, Hengyang, Hunan 421001, China
通讯机构：
[Li, G.-Y.] S;School of Nuclear Resources Engineering, China
关键词：
铜尾矿;黑曲霉;生物浸出;铜;培养基
摘要：
以湖南某高碱性铜尾矿为研究对象,进行了黑曲霉摇瓶浸出实验,研究了浸出时间和PSA培养基成分、含量对铜浸出的影响. 结果表明,浸出时间为7 d时,铜浸出率最高,随浸出时间延长,铜浸出率显著下降. PSA培养基中的马铃薯和蔗糖含量对铜浸出有明显影响,马铃薯含量为200 g/L、蔗糖含量为20 g/L时,铜浸出率最高. 在接种量0.02%(φ)、矿浆浓度50 g/L、温度30℃、转速200 r/min、浸出时间7 d、马铃薯和蔗糖含量分别为200 g/L和20 g/L条件下,铜浸出率可达79.03%.
语种：
中文
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An artificially constructed Syngonium podophyllum-Aspergillus niger combinate system for removal of uranium from wastewater
作者：
He, Jia-dong;Wang, Yong-dong;Hu, Nan;Ding, Dexin* ;Sun, Jing;...
期刊：
Environmental Science and Pollution Research ,2015年22(23):18918-18926 ISSN：0944-1344
通讯作者：
Ding, Dexin
作者机构：
[Ding, Dexin; He, Jia-dong; Li, Chang-wu; Hu, Nan; Sun, Jing; Deng, Qin-wen; Xu, Fei; Wang, Yong-dong] Univ South China, Key Discipline Lab Natl Def Biotechnol Uranium Mi, Hengyang 421001, Hunan, Peoples R China.;[Ding, Dexin] 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：
Aspergillus niger;Syngonium podophyllum;Combinate system;Uranium wastewater;Phytoremediation
摘要：
Aspergillus niger was inoculated to the roots of five plants, and the Syngonium podophyllum-A. niger combinate system (SPANCS) was found to be the most effective in removing uranium from hydroponic liquid with initial uranium concentration of 5mgL−1. Furthermore, the hydroponic experiments on the removal of uranium from the hydroponic liquids with initial uranium concentrations of 0.5, 1.0, and 3.0mgL−1 by the SPANCS were conducted, the inhibitory effect of A. niger on the growth of S. podophyllum in the SPANCS was studied, the accumulation characteristics of uranium by S. podophyllum in the SPANCS were analyzed, and the Fourier transform infrared (FT-IR) and extended X-ray absorption fine structure (EXAFS) spectra were measured. The results show that the removal of uranium by the SPANCS from the hydroponic liquids with initial uranium concentrations of 0.5, 1.0, and 3.0mgL−1 reached 98.20, 97.90, and 98.50%, respectively, after 37days of accumulation of uranium; that the uranium concentrations in the hydroponic liquids decreased to 0.009, 0.021, and 0.045mgL−1, respectively, which are lower than the stipulated concentration for discharge of 0.050mgL−1 by the People’s Republic of China; that A. niger helped to generate more groups in the root of S. podophyllum which can improve the complexing capability of S. podophyllum for uranium; and that the uranium accumulated in the root of S. podophyllum was in the form of phosphate uranyl and carboxylic uranyl. © 2015, Springer-Verlag Berlin Heidelberg.
语种：
英文
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Column leaching of uranium ore with fungal metabolic products and uranium recovery by ion exchange
作者：
Wang, Yong-Dong;Li, Guang-Yue* ;Ding, De-Xin;Zhang, Zhen-Yuan;Chen, Jie;...
期刊：
Journal of Radioanalytical and Nuclear Chemistry ,2015年304(3):1139-1144 ISSN：0236-5731
通讯作者：
Li, Guang-Yue
作者机构：
[Zhang, Zhen-Yuan; Li, Guang-Yue; Li, Le; Hu, Nan; Wang, Yong-Dong; Ding, De-Xin; Chen, Jie] Univ South China, Key Discipline Lab Natl Def Biotechnol Uranium Mi, Hengyang 421001, Hunan, Peoples R China.
通讯机构：
[Li, Guang-Yue] U;Univ South China, Key Discipline Lab Natl Def Biotechnol Uranium Mi, Hengyang 421001, Hunan, Peoples R China.
关键词：
sulfuric acid;unclassified drug;uranium;uranium ore;Article;Aspergillus niger;chemical analysis;chemical composition;column leaching;concentration (parameters);controlled study;fungal metabolism;fungal strain;ion exchange;leaching;nonhuman;particle size;physical parameters
摘要：
To verifying the feasibility of uranium recovery with fungal metabolic products in large-scale applications, column leaching and ion exchange of uranium was carried out. The uranium recovery reached 81.76 % in 14 days. The ion exchange curve for the leach solution obtained with the metabolic products of Aspergillus niger was in the shape of a wave. The elution curve was similar to that of leaching with H2SO4. The results indicate that leaching with the metabolic products of A. niger is a promising and environmentally friendly method for exploitation of low grade uranium ores in large-scale applications. © Akadémiai Kiadó, Budapest, Hungary 2015.
语种：
英文
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Bioreduction of U(VI) in groundwater under anoxic conditions from a decommissioned in situ leaching uranium mine
作者：
Ding, De-xin* ;Li, Shi-mi;Hu, Nan;Xu, Fei;Li, Guang-yue;...
期刊：
Bioprocess and Biosystems Engineering ,2015年38(4):661-669 ISSN：1615-7591
通讯作者：
Ding, De-xin
作者机构：
[Li, Shi-mi; Li, Guang-yue; Hu, Nan; Ding, De-xin; Xu, Fei; Wang, Yong-dong] Univ South China, Key Discipline Lab Natl Def Biotechnol Uranium Mi, Hengyang 421001, Hunan, 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：
In situ leaching;Groundwater;Bioreduction;U(VI);Anaerobic zone
摘要：
To determine whether the U(VI) in groundwater under anoxic conditions at a decommissioned in situ leaching (ISL) uranium mine could be bioreduced, groundwater samples containing suspended sediments were taken from the mine, experimental setup was fabricated, and the jar containing the groundwater in the setup was amended with ethanol and incubated under anoxic conditions. The variations of pH, chemical oxygen demand, nitrate, sulfate, U(VI), and dissolved oxygen (DO) concentrations were monitored during the incubation. U(VI) concentration dropped to 0.043 mg/L when the stimulated microorganisms were active, and it then increased to 0.835 mg/L within 10 days after the metabolism of the stimulated microorganisms was inhibited. The DO variation was observed in the amended jar during the incubation, and the metabolism of the stimulated microorganisms was found to affect the DO concentration. Firmicutes were found to be dominant in the sediments in the amended jar through the 16S rRNA pyrosequencing. The results indicate that it is possible to bioreduce U(VI) in the groundwater under anoxic conditions at the decommissioned ISL uranium mine by adding carbon source into it without removing the oxygen from it.
语种：
英文
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Phytoextraction of uranium from contaminated soil by Macleaya cordata before and after application of EDDS and CA
作者：
Li, Chang-wu;Hu, Nan;Ding, De-xin* ;Hu, Jin-song;Li, Guang-yue;...
期刊：
Environmental Science and Pollution Research ,2015年22(8):6155-6163 ISSN：0944-1344
通讯作者：
Ding, De-xin
作者机构：
[Li, Guang-yue; Li, Chang-wu; Hu, Jin-song; Hu, Nan; Ding, De-xin; Wang, Yong-dong] Univ South China, Key Discipline Lab Natl Def Biotechnol Uranium Mi, Hengyang 421001, Hunan, 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：
Macleaya cordata;Phytoextraction;Uranium;[S,S]-Ethylenediaminedisuccinic acid;Citric acid;Soil solution
摘要：
This is the first report on using Macleaya cordata for phytoextraction of uranium from the uranium contaminated soil in the greenhouse. Macleaya M. cordata was found to increase uranium concentration in the soil solution by increasing the dissolved organic carbon (DOC). The amendment experiments with citric acid (CA) and [S,S]-ethylenediamine disuccinic acid (EDDS) at the rates of 1.0, 2.5, 5.0, and 10.0mmolkg−1 dry weight (DW) soil showed that EDDS was more efficient to increase uranium concentration in the shoot than CA when they were applied at the same rate. The applications of 5.0mmolkg−1 EDDS and 10.0mmolkg−1 CA were most appropriate for increasing uranium concentrations in the shoot of M. cordata. CA was more efficient to increase the solubility of uranium at the same application rates except for 2.5mmolkg−1 application rate. There was a linear correlation between the uranium concentration in the shoot and the average uranium concentration of one planted pot during 14days in soil solution after the application of different rates of EDDS and CA, respectively (r2 = 0.972, P < 0.01; r2 = 0.948, P < 0.01), indicating that uranium uptake was dependent on the soluble uranium concentration. The Fe-U-DOC and Mn-U-DOC complexes were probably formed after the application of CA. Soil solution pH and Fe, Mn, Ca, and DOC concentrations in soil solution were found to be changed by the chelates. © 2014, Springer-Verlag Berlin Heidelberg.
语种：
英文
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Isolation of a strain of Penicillium funiculosum and mutational improvement for UO2 2+ adsorption
作者：
Sun, Jing;Li, Qian;Wang, Yongdong;Zhou, Zhixiang;Ding, Dexin*
期刊：
Journal of Radioanalytical and Nuclear Chemistry ,2015年303(1):427-432 ISSN：0236-5731
通讯作者：
Ding, Dexin
作者机构：
[Li, Qian; Ding, Dexin; Sun, Jing; Wang, Yongdong; Zhou, Zhixiang] Univ South China, Key Discipline Lab Natl Def Biol Technol Uranium, Hengyang 421001, Hunan, Peoples R China.
通讯机构：
[Ding, Dexin] U;Univ South China, Key Discipline Lab Natl Def Biol Technol Uranium, Hengyang 421001, Hunan, Peoples R China.
关键词：
adsorption;gene sequence;mutation;Talaromyces funiculosus;ultraviolet radiation
摘要：
An absorptive fungal strain for uranium adsorption which is named Q5, was isolated from the drainage of a uranium mine in South China. The morphological, physiological and phylogenetic characterizations of the strain Q5 were investigated. The results showed that, the strain Q5 identified as Penicillium funiculosum (99% similarity in gene sequence). Furthermore, the adsorption performance of P. funiculosum was greatly improved by the mutational method that combined hydroxylamine hydrochloride and UV light. The results showed that the adsorption capacity of the mutated P. funiculosum for U(VI) was obviously better than the non-mutational one at pH 2.0–9.0. © 2014, Akadémiai Kiadó, Budapest, Hungary.
语种：
英文
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Adsorption and recovery of U(VI) from low concentration uranium solution by amidoxime modified Aspergillus niger
作者：
Li, Le;Hu, Nan;Ding, Dexin* ;Xin, Xin;Wang, Yongdong;...
期刊：
RSC Advances ,2015年5(81):65827-65839 ISSN：2046-2069
通讯作者：
Ding, Dexin
作者机构：
[Ding, Dexin; Zhang, Hui; Tan, Yan; Li, Le; Hu, Nan; Xin, Xin; Xue, Jinhua; Wang, Yongdong] Univ South China, Key Discipline Lab Natl Def Biotechnol Uranium Mi, Hengyang 421001, Peoples R China.;[Tan, Yan; Li, Le; Xue, Jinhua] Univ South China, Sch Publ Hlth, 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：
Amidoxime modified Aspergillus niger (AMAN) was prepared by the oximation reaction. The effects of the initial pH, contact time, initial U(vi) concentration and biosorbent dose on the adsorption of U(vi) ions from radioactive wastewater in U(vi) concentrations of less than 1 mg L<sup>-1</sup>by AMAN and the raw Aspergillus niger (RAN) were investigated. The maximum adsorption efficiency by AMAN for the 0.5 mg L<sup>-1</sup>U(vi) solution amounted to 98.85% under the optimum adsorption conditions, while the maximum adsorption efficiency by RAN was only 77.83%. The adsorption equilibrium data were found to be best fitted to Langmuir isotherm model, and the maximum biosorption capacity of AMAN for U(vi) was estimated to be 621 mg g<sup>-1</sup>at 298 K. The biosorption kinetics followed the pseudo-second order model and intraparticle diffusion equation. The Gibbs free energy change (ΔG°), enthalpy change (ΔH°) and entropy change (ΔS°) showed that the adsorption process of U(vi) was spontaneous, feasible and endothermic. The SEM-EDS study indicated that much more U(vi) ions were adsorbed by AMAN than by RAN. FT-IR study showed that the -NH<inf>2</inf>and =N-OH groups of amidoxime were the dominant ones for binding UO<inf>2</inf><sup>2+</sup>ions. Moreover, AMAN was found to have excellent selective adsorption capability of U(vi) due to amidoxime groups. The UO<inf>2</inf><sup>2+</sup>ions adsorbed by AMAN could be desorbed using 0.1 M HCl, and the desorption efficiency reaching 87.28% at the 8th cycle of adsorption and desorption. ©The Royal Society of Chemistry.
语种：
英文
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菌丝球形态的黑曲霉发酵液浸出铜尾砂
作者：
李广悦;刁宁宁;王永东;杜康;张振远
期刊：
化工学报 ,2015年66(2):717-722 ISSN：0438-1157
通讯作者：
Li, Guangyue(lgy673@163.com)
作者机构：
[李广悦; 刁宁宁; 王永东; 杜康; 张振远] Key Discipline Laboratory for National Defense of Biotechnology in Uranium Mining and Hydrometallurgy, University of South China, Hengyang;Hunan;421001, China;School of Nuclear Resources Engineering, University of South China, Hengyang;[李广悦; 刁宁宁; 王永东; 杜康; 张振远] Hunan
关键词：
黑曲霉;菌丝球;发酵;浸出;铜尾砂;优化
摘要：
尾砂中含有大量的金属,是一种潜在的可利用资源。旨在研发一种从铜尾砂中回收铜的生物浸出方法。利用正交设计,通过摇瓶试验,研究培养温度、发酵时间、接种量及培养基成分对黑曲霉菌丝球形态的影响,进而研究不同菌丝球形态的黑曲霉发酵液对尾砂中铜的浸出。研究表明,铜的浸出率随着黑曲霉菌丝球直径的减小而升高。在温度30℃,接种量0.8%(OD_(600)=0.1),马铃薯-蔗糖含量30%,发酵时间65 h的优化发酵条件下,获得大量表面光滑、直径为0.96 mm的菌丝球;利用该条件下的发酵液,在30℃,180 r·min~(-1)条件下浸出3 d,铜的浸出率达83.25%。
语种：
中文
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1株尿素分解菌的分离及其生长特性
作者：
陈杰;李广悦;张振远;丁德馨;王永东;...
期刊：
微生物学杂志 ,2014年34(2):37-40 ISSN：1005-7021
作者机构：
[陈杰; 李广悦; 张振远; 丁德馨; 王永东; 胡南] 南华大学
关键词：
尿素水解;分离;生长特性
摘要：
利用微生物诱导碳酸钙沉淀（Microbially Induced Calcite Precipitation,MICP）进行岩土工程加固是一种绿色原位加固新技术。为获得用于MICP技术的菌株,采用选择性富集、平板分离法从土壤中分离了1株尿素分解菌,并研究了其生长特性。结果表明这株尿素分解菌的最适生长条件为初始pH值9,接种量4%,温度35℃,摇床转速200 r/min。
语种：
中文
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铀矿堆浸分形动力学模型
作者：
宋键斌;丁德馨;叶勇军;李广悦;扶海鹰;...
期刊：
原子能科学技术 ,2014年48(4):598-603 ISSN：1000-6931
通讯作者：
Ding, D.-X.(dingdxzzz@163.com)
作者机构：
[宋键斌; 丁德馨; 叶勇军; 李广悦; 扶海鹰; 胡南; 王永东] Key Discipline Lab for National Defense for Biotechnology in Uranium Mining and Hydrometallurgy, University of South China, Hengyang 421001, China
通讯机构：
Key Discipline Lab for National Defense for Biotechnology in Uranium Mining and Hydrometallurgy, University of South China, China
关键词：
铀矿;堆浸铀矿石;粒径分布;分维数;动力学模型
摘要：
本文采用堆浸铀矿石粒径分布分维数代替其平均粒径,对M ellado等提出的矿石堆浸动力学模型进行了改进。同时采用铀矿柱浸试验确定了铀矿堆浸分形动力学模型参数与堆浸铀矿石粒径分布分维数的关系,建立了铀矿堆浸分形动力学模型,并进一步采用柱浸试验对模型进行了验证。结果表明,所建立的铀矿堆浸分形动力学模型能很好地反映铀矿堆浸铀金属浸出的规律。
语种：
中文
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Adsorption of uranium ions from aqueous solution by amine-group functionalized magnetic Fe3O4 nanoparticle
作者：
Peng, G. W.* ;Ding, D. X.;Xiao, F. Z.;Wang, X. L.;Hun, N.;...
期刊：
Journal of Radioanalytical and Nuclear Chemistry ,2014年301(3):781-788 ISSN：0236-5731
通讯作者：
Peng, G. W.
作者机构：
[Peng, G. W.; Xiao, F. Z.; Wang, Y. D.; Ding, D. X.; Wang, X. L.; Hun, N.] Univ South China, Key Discipline Lab Natl Def Biotechnol Uranium Mi, Hengyang 421001, Hunan, Peoples R China.;[Cao, Z.; Dai, Y. M.] Changsha Univ Sci & Technol, Sch Chem & Biol Engn, Hunan Prov Key Lab Mat Protect Elect Power & Tran, Changsha 410004, Hunan, Peoples R China.
通讯机构：
[Peng, G. W.] U;Univ South China, Key Discipline Lab Natl Def Biotechnol Uranium Mi, Hengyang 421001, Hunan, Peoples R China.
会议名称：
Biennial Symposium on Nuclear and Radiochemistry
会议时间：
FEB 19-23, 2013
会议地点：
Jabalpur, INDIA
会议主办单位：
[Peng, G. W.;Ding, D. X.;Xiao, F. Z.;Wang, X. L.;Hun, N.;Wang, Y. D.] Univ South China, Key Discipline Lab Natl Def Biotechnol Uranium Mi, Hengyang 421001, Hunan, Peoples R China.^[Dai, Y. M.;Cao, Z.] Changsha Univ Sci & Technol, Sch Chem & Biol Engn, Hunan Prov Key Lab Mat Protect Elect Power & Tran, Changsha 410004, Hunan, Peoples R China.
关键词：
iron oxide amine nanoparticle;magnetic iron oxide nanoparticle;magnetic nanoparticle;nanoparticle;unclassified drug;uranium;uranium ion;adsorption;adsorption kinetics;article;batch process;controlled study;immobilization;infrared spectroscopy;isotherm;pH;surface property;temperature;thermodynamics;time;X ray powder diffraction
摘要：
The magnetic Fe3O4 nanoparticle was functionalized by covalently grafting amine group with (3-aminopropyl) trimethoxy silane, and the Fe3O4-NH2 nanoparticle and the Fe 3O4 nanoparticle were characterized by Fourier transform infrared, and X-ray diffraction. And the results indicated the amine-group was immobilized successfully on the surface of Fe3O4. The adsorption behavior of uranium from aqueous solution by the Fe3O 4 nanoparticle and the Fe3O4-NH2 nanoparticle was investigated using batch experiments. The pH of initial aqueous solution at 5.0 and 6.0 were in favour of adsorption of uranium, and the adsorption percentage of uranium by the Fe3O4 nanoparticle and the Fe3O4-NH2 nanoparticle were 81.2 and 95.6 %, respectively. In addition, the adsorption of uranium ions could be well-described by the Langmuir, Freundlich isotherms and pseudo-second kinetic models. The monolayer adsorption maximum capacity of the Fe3O 4 nanoparticle and the Fe3O4-NH2 nanoparticle were 85.35 and 268.49 mg/g at 298.15 K, respectively, which indicate the adsorption capacity the Fe3O4 nanoparticle was improved by amine functionalization. © 2014 Akadémiai Kiadó.
语种：
英文
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耐辐射奇球菌对水中铀（Ⅵ）的吸附试验
作者：
邓钦文;丁德馨;刘冬;王永东
期刊：
金属矿山 ,2014年(1):150-153 ISSN：1001-1250
作者机构：
南华大学环境保护与安全工程学院,湖南衡阳,421001;南华大学核资源工程学院,湖南衡阳,421001;[王永东] 王永东;[丁德馨] 丁德馨;[邓钦文] 邓钦文
关键词：
耐辐射奇球菌;铀(Ⅵ);吸附
摘要：
为探索治理铀污染的新工艺、新方法,对耐辐射奇球菌吸附铀(Ⅵ)的影响因素进行了研究.结果表明,溶液的pH值、吸附时间和吸附剂投加量对铀去除率影响显著.在含铀(Ⅵ)模拟废水pH =5、吸附时间为180 min、初始浓度为50 mg/L的情况下,投加0.2 g/L的耐辐射奇球菌体吸附剂,铀(Ⅵ)吸附率可达92.30％;随着铀(Ⅵ)初始浓度的提高,铀吸附率微幅下降,吸附量几乎与铀(Ⅵ)浓度成正比.对吸附机理的探讨表明,耐辐射奇球菌对铀(Ⅵ)的吸附行为符合Freundlich等温模型和准二级动力学模型.
语种：
中文
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3种不同植物与黑曲霉孢子联合去除水中U（Ⅵ）的研究
作者：
邓钦文;丁德馨;王永东;吕俊文;陈衍东
期刊：
环境科技 ,2014年(4):1-5 ISSN：1674-4829
作者机构：
南华大学环境保护与安全工程学院,湖南 衡阳,421001;南华大学核资源工程学院,湖南 衡阳,421001;[王永东; 陈衍东; 丁德馨; 吕俊文; 邓钦文] 南华大学
关键词：
黑曲霉孢子;协同修复;铀
摘要：
为探索降低铀（U）污染的新途径、新方法，选用白鹤芋、观音竹、碎米莎草进行水培实验。对3种不同植物联合黑曲霉孢子去除U（Ⅵ）以及外加碳源、氮源的影响因素进行了研究。结果表明，在12 d的培养期内，白鹤芋挂膜黑曲霉孢子对U的去除能力比其他2种植物要强，去除率高达98.13%。外加碳源、氮源的最佳组合为葡萄糖4 g、硫酸铵0.4 g。同时证明，微生物通过挂膜，联合植物协同修复U污染水体有可操作性。
语种：
中文
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Regularities for uranium leaching rate at different heights of column for leaching uranium from uranium ore
作者：
扶海鹰;丁德馨;叶勇军;李广悦;宋键斌;...
期刊：
中南大学学报(自然科学版) ,2014年45(6):1766-1771 ISSN：1672-7207
通讯作者：
Ding, D.(dingdxzzz@163.com)
作者机构：
[扶海鹰; 丁德馨; 叶勇军; 李广悦; 宋键斌; 胡南; 王永东] Key Discipline Lab for National Defense for Biotechnology in Uranium Mining and Hydrometallurgy, University of South China, Hengyang 421001, China
通讯机构：
Key Discipline Lab for National Defense for Biotechnology in Uranium Mining and Hydrometallurgy, University of South China, China
关键词：
铀矿;柱浸;堆浸;数学模型;浸出率
摘要：
针对铀矿堆浸生产中矿堆不同高度上的铀金属浸出存在的延迟现象,采用理论分析和室内柱浸试验研究铀矿浸出试验柱不同高度上铀金属浸出的规律。理论分析将铀矿浸出试验柱沿柱高划分为若干个高度足够小且相等的单元体,使其中单个铀矿石颗粒的浸出符合收缩未反应核扩散控制系统模型,且任意1个单元体内所有铀矿石颗粒反应均匀,不存在延迟现象,进而以1个单元体为目标,根据溶浸剂质量守恒原理,并考虑初始溶浸剂浓度的变化,建立铀矿浸出试验柱不同高度上铀金属浸出的数学模型。采用颗粒半径为2.5 mm 的铀矿石进行串联柱浸试验。然后,采用数学模型对柱浸试验结果进行计算,并将模型计算结果与柱浸试验结果进行比较。研究结果表明:试验柱不同高度上铀金属浸出率存在较大差别,且模型计算值与柱浸试验值具有相同的变化趋势,表明该数学模型能较好地反映铀矿浸出试验柱不同高度上铀金属浸出的延迟规律,可为预测铀矿堆浸不同高度上的浸出率提供重要参考。
语种：
中文
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Vegetation composition and 226 Ra uptake by native plant species at a uranium mill tailings impoundment in South China
作者：
Hu, Nan;Ding, Dexin* ;Li, Guangyue;Zheng, Jifang;Li, Le;...
期刊：
Journal of Environmental Radioactivity ,2014年129:100-106 ISSN：0265-931X
通讯作者：
Ding, Dexin
作者机构：
[Ding, Dexin; Zheng, Jifang; Li, Le; Li, Guangyue; Hu, Nan; Wang, Yongdong; Zhao, Weichao] Univ South China, Key Discipline Lab Natl Def Biotechnol Uranium Mi, Hengyang 421001, Hunan, Peoples R China.
通讯机构：
[Ding, Dexin] U;Univ South China, Key Discipline Lab Natl Def Biotechnol Uranium Mi, Hengyang 421001, Hunan, Peoples R China.
关键词：
Bioremediation;pH;Radium;Soil pollution;Uranium;Field investigation;Hyperaccumulator;Mill tailings impoundment;Phytoremediation;Uranium mill tailings;Vegetation community;Vegetation community compositions;Vegetation composition;Vegetation;radium 226;transfer factor;uranium;biological uptake;community composition;fern;hyperaccumulation;impoundment;mill;mine drainage;pH;phytoremediation;radioactive pollution;radon isotope;soil pollution;tailings;uranium;Amaranthaceae;Anacardiaceae;Aquifoliaceae;article;Asteraceae;bracken fern;brake fern;chemical composition;China;Cyperaceae;Dryopteridaceae;Dryopteris;Dryopteris scottii;Euphorbiaceae;Hamamelidaceae;Lauraceae;Liliaceae;Malvaceae;Meliaceae;mine tailings;Moraceae;nonhuman;Oleaceae;Oxalidaceae;Papaveraceae;pH;Phytolaccaceae;phytoremediation;plant community;plant leaf;Plantaginaceae;Poaceae;Polygonaceae;Portulacaceae;Pteridaceae;Pteris multifida;radiation exposure;radioactive contamination;radioisotope distribution;Rosaceae;Salicaceae;sampling;Solanaceae;Ulmaceae;Urticaceae;vegetation;Verbenaceae;Zingiberaceae;China
摘要：
A field investigation was conducted for the vegetation composition and 226Ra uptake by native plant species at a uranium mill tailings impoundment in South China. 80 species belonging to 67 genera in 32 families were recorded in the sampling sites. The Poaceae and Asteraceae were the dominant families colonizing the impoundment. The number of the plant species and vegetation community composition in the sampling sites seemed most closely related to the activities of 226Ra and the pH value of the uranium tailings. The plant species in the sampling sites with relatively low activities of 226Ra and relatively high pH value formed a relatively stable vegetation community. The plant species in the sampling sites with medium activities of 226Ra and medium pH value formed the transitional vegetation community. The plant species in the sampling sites with relatively high activities of 226Ra and relatively low pH value formed a simple unstable vegetation community that was similar to that on the unused grassland. The activities of 226Ra and transfer factors (TFs) varied greatly with the plant species. The high activities of 226Ra and TFs were found in the leaves of Pteris multifida (150.6Bq/g of AW; 9.131), Pteridium aquilinum (122.2Bq/g of AW; 7.409), and Dryopteris scottii (105.7Bq/g of AW; 6.408). They satisfied the criteria for a hyperaccumulator for 226Ra. They may be the candidates for phytoremediation of 226Ra in the uranium mill tailings impoundment areas and the contaminated soils around. © 2014 Elsevier Ltd.
语种：
英文
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