Effect of culture parameters on the biosorption of uranium onto chlorella pyrenoidosa
作者：
Li, Shiyou* ;Xie, Shuibo;Liu, Jinxiang;Rong, Lishan;Zhao, Cong;...
期刊：
Advanced Materials Research ,2012年518-523:3321-3327 ISSN：1022-6680
通讯作者：
Li, Shiyou
作者机构：
[Zhou, Shuai; Rong, Lishan; Zhao, Cong; Liu, Jinxiang; Li, Shiyou] Univ S China, Hunan Prov Key Lab Pollut Control & Resources Tec, Hengyang 421001, Hunan, Peoples R China.
通讯机构：
[Li, Shiyou] U;Univ S China, Hunan Prov Key Lab Pollut Control & Resources Tec, Hengyang 421001, Hunan, Peoples R China.
会议名称：
1st International Conference on Energy and Environmental Protection (ICEEP 2012)
会议时间：
JUN 23-24, 2012
会议地点：
Hohhot, PEOPLES R CHINA
会议主办单位：
[Li, Shiyou;Liu, Jinxiang;Rong, Lishan;Zhao, Cong;Zhou, Shuai] Univ S China, Hunan Prov Key Lab Pollut Control & Resources Tec, Hengyang 421001, Hunan, Peoples R China.
会议论文集名称：
Advanced Materials Research
关键词：
Biosorption;Chlorella pyrenoidosa;Orthogonal experiment;U(VI)
摘要：
The usefulness of chlorella pyrenoidosa were investigated for the removel of U(VI) from aqueous solution. Employing monofactorial and orthogonal experiment method for evaluating the biosorption of U(VI) onto chlorella pyrenoidosa, respectively, the influence of U(VI) concentration, pH, N/P and temperature on the biosorption of U(VI) by chlorella pyrenoidosa were studied.The results showed that the pH and U(VI) concentration were significant to remove U(VI) and that the increases of pH as well as U(VI) concentration was beneficial to the U(VI) absorption. However, the U(VI) absorption was affected less by the N/P and the temperature. Confirmed through orthogonal experiment, the optimum condition composition to attenuate U(VI) was 3.4mg/L U(VI) concentration at pH 6.0 with temperature 293K,and 3/1 of N/P. It was also proved that fresh cell of 1g/L(in dry weight) was able to attenuate U(VI) in wastewater from 3.4mg/L to 0.72 mg/L after batch experiments under the optimum conditions, which indicated good prospect in its future application. ©(2012) Trans Tech Publications, Switzerland.
语种：
英文
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固定床生物反应器模拟溶浸采铀吸附尾液中Fe~(2+)的氧化试验
作者：
王清良;杨懿全;杨敬;陈勇博;胡鄂明;...
期刊：
化工学报 ,2012年63(11):3688-3693 ISSN：0438-1157
通讯作者：
Wang, Q.(nhwql@sina.com)
作者机构：
[余润兰; 邱冠周] School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, Hunan, China;[杨懿全; 杨敬; 陈勇博; 胡鄂明; 张洪灿] School of Nuclear Resource and Nuclear Fuel Engineering, University of South China, Hengyang 421001, Hunan, China;[王清良] School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, Hunan, China<&wdkj&>School of Nuclear Resource and Nuclear Fuel Engineering, University of South China, Hengyang 421001, Hunan, China
通讯机构：
School of Minerals Processing and Bioengineering, Central South University, China
关键词：
固定床生物反应器;嗜酸氧化亚铁硫杆菌;氧化;溶浸采铀
摘要：
以活性炭作载体固定嗜酸氧化亚铁硫杆菌,构建固定床生物反应器,模拟溶浸采铀矿山吸附尾液全Fe浓度和溶液pH条件,对生物反应器氧化Fe~(2+)工艺参数进行了试验研究。结果表明:活性炭作载体比无载体时生物反应器氧化Fe~(2+)速率增加了1.4倍,由0.5g·L~(-1)·h~(-1)增大至1.2g·L~(-1)·h~(-1);生物反应器运行过程中溶液中全Fe因生成铁钒而不断消耗,需要定期清理反应器中的铁矾和补充FeSO_4以保持溶液中全Fe浓度;生物反应器最优的操作条件是:底部通气,Fe~(2+)浓度为5g·L~(-1)时,溶液流量为1.2~1.4L·h~(-1);Fe~(2+)浓度为1g·L~(-1)时,溶液流量为5.4L·h~(-1)。
语种：
中文
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黑曲霉产有机酸浸出铀矿石的影响因素
作者：
王永东;李广悦;丁德馨;胡南;邓钦文;...
期刊：
化工学报 ,2012年63(5):1584-1591 ISSN：0438-1157
通讯作者：
Ding, D.(dingdxzzz@163.com)
作者机构：
[王永东; 李广悦; 丁德馨; 胡南; 邓钦文; 周支香] Key Discipline Lab. for National Defense for Biotechnology in Uranium Mining and Hydrometallurgy, University of South China, Hengyang 421001, Hunan, 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：
真菌;黑曲霉;有机酸;浸铀;影响因素
摘要：
为了解培养基种类、培养温度和pH值等因素对黑曲霉产生的混合有机酸浸出铀矿石的影响,从铀矿山水样中分离、纯化得到了一株真菌——黑曲霉,应用马铃薯-蔗糖培养基(potato sucrose agar,PSA)和葡萄糖-玉米浆培养基(dextrose corn syrup,PCS)进行黑曲霉培养,获得了不同培养温度下产生的pH值不同的黑曲霉产混合有机酸,并将之作为浸出剂用于浸铀实验研究.研究表明,黑曲霉产生的有机酸的主要组分为草酸和柠檬酸等有机酸,培养基种类的不同会影响黑曲霉所产有机酸的浸铀效果,采用PSA培养基培养的黑曲霉产生的有机酸浸铀效果更好(p＜0.05).培养温度和混合有机酸的pH值也会对黑曲霉代谢产物的铀浸出率有显著性影响(p＜0.05),且二者具有交互效应,pH值对铀浸出率的影响相对较大.应用PSA培养基时,最佳培养温度为25℃,最佳代谢产物pH值为2.3；应用PCS培养基时,最佳培养温度为30℃,最佳混合有机酸pH值为2.0.培养基种类、温度和pH值主要通过改变黑曲霉产生的有机酸的成分和含量对铀浸出率产生影响.
语种：
中文
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位移反分析的模式搜索支持向量机方法及其应用
作者：
刘永;张志军;贺桂成;丁德馨
期刊：
中国有色金属学报 ,2012年22(11):3193-3200 ISSN：1004-0609
通讯作者：
Ding, D.-X.(dingdxzzz@163.com)
作者机构：
[刘永; 丁德馨; 张志军; 贺桂成] School of Nuclear Resources and Nuclear Fuel Engineering, University of South China, Hengyang 421001, China
通讯机构：
School of Nuclear Resources and Nuclear Fuel Engineering, University of South China, China
关键词：
模式搜索算法;支持向量机;位移反分析;围岩;数值模拟
摘要：
针对现有位移反分析方法所存在的反分析模型复杂、计算量大、分析过程人为干预多、求解难度高等问题,提出采用模式搜索算法优化支持向量机,建立一种位移反分析的模式搜索支持向量机方法(PSA-SVM)。以湖南某矿山一个地下矿房为例,应用所建方法对其围岩力学特性参数进行反演,并对该矿房围岩稳定性进行数值模拟计算,分析矿房回采后对地面沉降的影响;并将模拟计算结果与长期监测结果进行比较分析。结果表明:这种位移反分析的模式搜索支持向量机方法的反演结果与实际值吻合良好,完全能够满足工程应用的要求;此外,该方法还具有模型建立简捷、参数调节明确且结果为全局最优等特点,是一种优异的位移反分析方法。
语种：
中文
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Adsorption properties and mechanism of saccharomyces cerevisiae loaded by nano-Fe3 O4 on uranium
作者：
彭国文;丁德馨;胡南;杨雨山;王晓亮
期刊：
中国有色金属学报 ,2012年22(2):604-610 ISSN：1004-0609
通讯作者：
Ding, D.-X.(dingdxzzz@163.com)
作者机构：
[杨雨山; 彭国文] School of Resources and Safety Engineering, Central South University, Changsha 410083, China;[王晓亮; 彭国文] School of Chemistry and Chemical Engineering, University of South China, Hengyang 421001, China;[杨雨山; 彭国文; 胡南; 丁德馨] Key Discipline Lab. for National Defence for Biotechnology in Uranium Mining and Hydrometallurgy, University of South China, Hengyang 421001, China
通讯机构：
Key Discipline Lab. for National Defence for Biotechnology in Uranium Mining and Hydrometallurgy, University of South China, China
关键词：
纳米Fe3O4啤酒酵母菌;负载;吸附性能;吸附机理;铀
摘要：
以纳米Fe_3O_4磁性微粒负载啤酒酵母菌,制备一种新型铀吸附剂,考察其吸附铀的主要影响因素,即溶液pH值、铀初始浓度、吸附剂投加量及其粒度,分析吸附过程的反应动力学和等温吸附规律,并用扫描电镜和能谱仪分析吸附机理。结果表明:纳米Fe_3O_4负载啤酒酵母菌(NFSC)吸附铀的最佳条件是pH值为7.0,铀初始浓度为60 mg/L,NFSC加入量为50 mg,NFSC的最佳粒径为12 nm。NFSC对铀的吸附动力学较好地符合准二级动力学模型,相关系数为0.999 6;吸附等温线均能符合Langmuir和Freundlich等温线模型,说明该吸附体系是一个单层覆盖与多层吸附相结合的模式。扫描电镜和能谱图表明:NFSC吸附铀后表面形态发生变化,且吸附过程中共存物理吸附和化学吸附,属于混合吸附类型。
语种：
中文
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化学修饰啤酒酵母菌对铀的吸附特性
作者：
彭国文;丁德馨;胡南;杨雨山;王晓亮
期刊：
化工学报 ,2011年62(11):3201-3206 ISSN：0438-1157
通讯作者：
Ding, D.(dingdxzzz@163.com)
作者机构：
School of Resources and Safety Engineering, Central South University, Changsha 410083, Hunan, China;[丁德馨; 胡南] Key Discipline Lab. for National Defence for Biotechnology in Uranium Mining and Hydrometallurgy, University of South China, Hengyang 421001, Hunan, China;[王晓亮] School of Chemistry and Chemical Engineering, University of South China, Hengyang 421001, Hunan, China;[彭国文] School of Resources and Safety Engineering, Central South University, Changsha 410083, Hunan, China<&wdkj&>Key Discipline Lab. for National Defence for Biotechnology in Uranium Mining and Hydrometallurgy, University of South China, Hengyang 421001, Hunan, China<&wdkj&>School of Chemistry and Chemical Engineering, University of South China, Hengyang 421001, Hunan, China;[杨雨山] School of Resources and Safety Engineering, Central South University, Changsha 410083, Hunan, China<&wdkj&>Key Discipline Lab. for National Defence for Biotechnology in Uranium Mining and Hydrometallurgy, University of South China, Hengyang 421001, Hunan, China
通讯机构：
Key Discipline Lab. for National Defence for Biotechnology in Uranium Mining and Hydrometallurgy, University of South China, China
关键词：
修饰啤酒酵母;化学修饰;铀;生物吸附;动力学模型
摘要：
以甲醛为交联剂,将胱氨酸修饰到啤酒酵母菌(SC)上,并采用海藻酸钠和明胶固定化,得到一种新型的生物吸附剂——修饰啤酒酵母菌( MSC).通过红外光谱(IR)分别表征了两种吸附剂的结构,考察了其吸附铀的主要影响因素即溶液pH值、吸附时间等.结果表明:MSC细胞表面具有大量吸附铀的基团,MSC和SC吸附铀的最佳条件是:pH值为6.0,吸附时间分别为1.8、1.5h.对吸附动力学模型和吸附等温模型进行了分析,MSC和SC对铀的吸附动力学模型较好地符合了准二级动力学模型,MSC和SC的相关系数均大于0.99;吸附等温线均能符合Langmuir和Freundlich等温线模型,说明该吸附体系是一个单层覆盖与多层吸附相结合的吸附模式,且MSC的最大吸附量是SC的6.5倍.
语种：
中文
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Preparation of ethylenediamine-modified magnetic chitosan complex for adsorption of uranyl ions
作者：
Wang, Jing-song* ;Peng, Rui-ting;Yang, Jin-hui;Liu, Yao-chi;Hu, Xin-jiang
期刊：
Carbohydrate Polymers ,2011年84(3):1169-1175 ISSN：0144-8617
通讯作者：
Wang, Jing-song
作者机构：
[Wang, Jing-song; Peng, Rui-ting; Yang, Jin-hui] Univ S China, Sch Urban Construct, Hengyang 421001, Hunan, Peoples R China.;[Wang, Jing-song; Peng, Rui-ting; Yang, Jin-hui] Univ S China, Key Discipline Lab Natl Def Biotechnol Uranium Mi, Hengyang 421001, Hunan, Peoples R China.;[Liu, Yao-chi] Cent S Univ, Sch Chem & Chem Engn, Changsha 410083, Hunan, Peoples R China.;[Hu, Xin-jiang] Hunan Univ, Coll Environm Sci & Engn, Changsha 410082, Hunan, Peoples R China.
通讯机构：
[Wang, Jing-song] U;Univ S China, Sch Urban Construct, Hengyang 421001, Hunan, Peoples R China.
关键词：
Adsorption;Chitosan;Magnetic;Modified;Uranyl ions
摘要：
Ethylenediamine-modified magnetic chitosan (EMMC) complex was developed as a novel magnetic adsorbent for the removal of uranyl ions. XRD spectrum indicated that the magnetic particles were pure Fe3O4 with a spinel structure, and the binding of chitosan did not result in a phase change. IR analysis demonstrated that Fe3O4 particles were successfully bounded by chitosan and more amino groups appeared in the EMMC samples. EMMC was found to be quite efficient to adsorb uranyl ions at pH 2-7. Equilibrium was established within 30 min, and the kinetic experimental data properly correlated with the pseudo-second-order kinetic model, indicating that the chemical sorption is the rate-limiting step. The adsorption data could be best interpreted by the Sips model with a maximum adsorption capacity of 82.83 mg U g-1. The EMMC can be regenerated with high efficiency, suggesting that this adsorbent is satisfactory to reuse uranyl ions. © 2011 Elsevier Ltd. All rights reserved.
语种：
英文
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Preventing sintering bricks of purple sandy shale from lime brust: Experimental research on fixing calcium with sulfur
作者：
Feng, Zhigang* ;Liu, Jiang;Li, Huijuan
期刊：
Advanced Materials Research ,2011年189-193(382):580-584 ISSN：1022-6680
通讯作者：
Feng, Zhigang
作者机构：
[Feng, Zhigang; Liu, Jiang; Li, Huijuan] Univ S China, Sch Nucl Resource & Nucl Fuel Engn, Hengyang 421001, Peoples R China.
通讯机构：
[Feng, Zhigang] U;Univ S China, Sch Nucl Resource & Nucl Fuel Engn, Hengyang 421001, Peoples R China.
会议名称：
2nd International Conference on Manufacturing Science and Engineering
会议时间：
APR 09-11, 2011
会议地点：
Guilin, PEOPLES R CHINA
会议主办单位：
[Feng, Zhigang;Liu, Jiang;Li, Huijuan] Univ S China, Sch Nucl Resource & Nucl Fuel Engn, Hengyang 421001, Peoples R China.
会议论文集名称：
Advanced Materials Research
关键词：
Fixing calcium with sulfur;Lime brust;Purple sandy shale;Sintering bricks
摘要：
Simulating current sintering process used by the brickkiln, at 800 °C, i.e. calcination temperature of the marginal area of the brickkiln, this work conducted experimental research on preventing sintering bricks of purple sandy shale from lime brust through fixing free CaO in sintering bricks with sulfur of high-sulfur coal. It is concluded that the critical content of CaCO<inf>3</inf> in purple sandy shale, causing lime brust of sintering bricks, is 24% by weight, when it is below this, lime brust commonly doesn't occur;sulfur of high-sulfur coal (if necessarily, adulterated with pyrite ore) may effectively lower the concentration of free CaO in sintering bricks, accordingly eliminate or weaken lime brust;in condition of current market price of pyrite ore, the sintering process fixing free CaO with sulfur in pyrite ore is economically feasible. ©(2011) Trans Tech Publications.
语种：
英文
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Experimental Study on Restoration of Polluted Groundwater from in Situ Leaching Uranium Mining with Sulfate Reducing Bacteria and ZVI-SRB
作者：
Hu Kaiguang* ;Wang Qingliang;Tao Ganqiang;Wang Aihe;Ding Dexin
期刊：
Procedia Earth and Planetary Science ,2011年2(1):150-155 ISSN：1878-5220
通讯作者：
Hu Kaiguang
作者机构：
[Ding Dexin; Hu Kaiguang; Tao Ganqiang; Wang Qingliang] Univ S China, Key Discipline Lab Natl Def Biotechnol Uranium Mi, Hengyang 421001, Peoples R China.;[Wang Aihe] Hunan City Coll, Yiyang 4106004, Peoples R China.
通讯机构：
[Hu Kaiguang] U;Univ S China, Key Discipline Lab Natl Def Biotechnol Uranium Mi, Hengyang 421001, Peoples R China.
会议名称：
2nd International Conference on Mining Engineering and Metallurgical Technology (MEMT)
会议时间：
OCT 29-30, 2011
会议地点：
Macau, PEOPLES R CHINA
会议主办单位：
[Hu Kaiguang;Wang Qingliang;Tao Ganqiang;Ding Dexin] Univ S China, Key Discipline Lab Natl Def Biotechnol Uranium Mi, Hengyang 421001, Peoples R China.^[Wang Aihe] Hunan City Coll, Yiyang 4106004, Peoples R China.
会议论文集名称：
Procedia Earth and Planetary Science
关键词：
sulfate radical;nitrate radical;Sulfate-Reducing Bacteria (SRB);Zero Valent Iron (ZVI);In situ leaching of uranium
摘要：
In the case of in situ leaching of uranium, the primitive geochemical environment for groundwater is changed since leachant is injected into the water beaving uranium deposit. This increases the concentration of uranium and results in the groundwater contamination.Microbial reduction technology by Sulfate reducing bacteria and Zero Valent Iron were employed to treat uranium wastewater. The experiments were conducted to evaluate the influence of anion (sulfate and nitrate) on dealing with uranium wastewater. Experimental results show that the utilization of both SRB system and ZVI - SRB system to process uranium wastewater is affected by sulfate ion and nitrate ion. As the concentration of sulfate radical is lower than 4000mg/L, sulfate-reducing bacteria has no influence on precipitated uranium. However, as the concentration of sulfate is more than 6,000 mg/L, uranium removal rate decreases significantly, from 80% to 14.1%. When adding sulfate radical on ZVI - SRB system to process uranium wastewater, its uranium removal rate is higher than SRB system. Low concentration of nitrate contributes to reduction metabolism of SRB. High concentration of nitrate inhibits the growth and metabolism of SRB and affects the treatment efficiency of uranium wastewater. When the concentration of nitrate reaches 1500mg/L, uranium removal rate is less than 0.1%. Nevertheless, as the concentration of nitrate is lower than 1000mg/L, uranium removal rate could reach more than 75%. As existence of nitrate radical, uranium removal rate of SRB by adding ZVI is higher than that without adding. ©2011 Published by Elsevier Ltd.
语种：
英文
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低应变动测桩及锚杆中波的传播规律差异研究
作者：
孙冰;曾晟;丁德馨;綦春明;喻清
期刊：
岩土力学 ,2011年32(4):1143-1148 ISSN：1000-7598
通讯作者：
Ding, D.-X.(dingdx0734@126.com)
作者机构：
[Zeng, Sheng; 綦春明; 孙冰; 丁德馨; 喻清] School of Nuclear Resources and Nuclear Fuel Engineering, University of South China, Hengyang, Hunan 421001, China;[孙冰; 丁德馨] School of Resources and Safety Engineering, Central South University, Changsha 410083, China
通讯机构：
School of Nuclear Resources and Nuclear Fuel Engineering, University of South China, China
关键词：
岩土工程;低应变;动测;锚杆;桩基;波速
摘要：
应力波法是检测桩基与锚杆质量的一种快速、有效的无损检测方法, 运用该法对桩基与锚杆进行质量检测时均基于一维杆件的波动理论, 波速是进行二者质量判断的最基本参数, 部分研究和工程技术人员易将两种应力波速混淆, 可能会造成实际检测中的误判. 为此, 以自由锚杆和不同龄期下标准混凝土试块中的应力波速为参考, 采用低应变反射波法对桩基和锚杆中的应力波速进行了对比研究. 研究表明, 桩基中的应力波速与锚杆中的应力波速存在较大的差别, 前者略大于标准规格混凝土试件中的波速, 而后者小于自由锚杆中的应力波速大于桩基和标准混凝土试块中的波速; 桩基和混凝土试块中的应力波速与龄期和强度近似服从上升指数关系, 而锚杆中的应力波速与龄期和强度近似服从下降的指数关系
语种：
中文
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Investigation and modeling on fatigue damage evolution of rock as a function of logarithmic cycle
作者：
Xiao, Jian-Qing;Feng, Xia-Ting* ;Ding, De-Xin;Jiang, Fu-Liang
期刊：
International Journal for Numerical and Analytical Methods in Geomechanics ,2011年35(10):1127-1140 ISSN：0363-9061
通讯作者：
Feng, Xia-Ting
作者机构：
[Xiao, Jian-Qing; Feng, Xia-Ting] Chinese Acad Sci, State Key Lab Geomech & Geotech Engn, Inst Rock & Soil Mech, Wuhan 430071, Peoples R China.;[Xiao, Jian-Qing] Anyang Normal Univ, Sch Civil Engn & Architecture, Anyang 455002, Peoples R China.;[Jiang, Fu-Liang; Xiao, Jian-Qing; Ding, De-Xin] Univ S China, Sch Nucl Resource & Nucl Fuel Engn, Hengyang 421001, Peoples R China.
通讯机构：
[Feng, Xia-Ting] C;Chinese Acad Sci, State Key Lab Geomech & Geotech Engn, Inst Rock & Soil Mech, Wuhan 430071, Peoples R China.
关键词：
rock;fatigue damage;cyclic loading;inverted-S model
摘要：
The fatigue damage behavior of granite under constant and variable amplitude loadings is studied. The experimental analysis reveals that there is a three-stage law for the fatigue damage evolution as a function of absolute or relative cycle and the inverted-S damage model proposed by the author, in this case, is capable of representing the damage behavior of rock. However, when the logarithmic cycle is considered, there are only two stages, i.e. steady and accelerated stages and the fatigue damage evolution greatly depends on the properties of rock and stress level. Accordingly, the fatigue damage evolution curves have been categorized into three types. Then, the effect of maximum stress, amplitude and fatigue initial damage on the damage evolution of rock is investigated. The analysis reveals that the damage evolution greatly depends on these influencing factors. The fatigue life decreases with the increase in the maximum stress, amplitude and fatigue initial damage due to the decrease in the proportion of the first stage to the whole fatigue process and the increase in the damage rate in the first stage. Meanwhile, a linear-exponential formula is used to model the fatigue damage behavior of rock subjected to cyclic loading. This damage model is superior to the inverted-S damage model in the convenience of establishment of critical instability point. The physical meanings of its constants have been illuminated and the applicability of this model to constant and variable amplitude cyclic loading explored. The fitting results for the test data show that this damage model can properly represent the fatigue damage behavior of rock. Copyright © 2010 John Wiley & Sons, Ltd.
语种：
英文
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Discussion of Paleocene-Eocene boundary of SanShui basin
作者：
Chen, Liang* ;Xie, Yanshi
期刊：
Advanced Materials Research ,2011年236-238:2487-2490 ISSN：1022-6680
通讯作者：
Chen, Liang
作者机构：
[Chen, Liang; Xie, Yanshi] Univ S China, Sch Nucl Resource & Nucl Fuel Engn, Hengyang 421001, Hunan, Peoples R China.
通讯机构：
[Chen, Liang] U;Univ S China, Sch Nucl Resource & Nucl Fuel Engn, Hengyang 421001, Hunan, Peoples R China.
会议名称：
International Conference on Chemical Engineering and Advanced Materials
会议时间：
MAY 28-30, 2011
会议地点：
Changsha, PEOPLES R CHINA
会议主办单位：
[Chen, Liang;Xie, Yanshi] Univ S China, Sch Nucl Resource & Nucl Fuel Engn, Hengyang 421001, Hunan, Peoples R China.
会议论文集名称：
Advanced Materials Research
关键词：
Microfossil;Paleocene-Eocene boundary;Paleocene-Eocene thermal maximum;SanShui basin
摘要：
Core SB-01 , located in SanShui Basin, contained two ostracode assemblages and two charophyte assemblages. Ostracode assemblages included Sinocypris nitela-Cyprois buxinensis-Limnocythere honggangensis assemblages (89.0-73.38m) and Sinocypris nitela-Cyprois buxinensis-Limnocythere honggangensis assemblages (73.38-0m);Charophyte assemblages consisted of Peckichara subspherica- Rhabdochara jiangduensis assemblages (89.0-73.38m) and Gyrogona qianjiangica-Obtusochara brevicylindrica (73.38-53.75m) assemblages. At 73.38 core depth, the abrupt change of microfossil assemblages took place, and δ<sup>13</sup>C and δ<sup>18</sup>O values of bulk carbonates also changed rapidly, the former decreased and the latter enhanced respectively. It consisted with the geological records of the Paleocene-Eocene Thermal Maximum (PETM), hence Paleocene-Eocene boundary of SanShui Basin should be roughly placed at 73.38m core depth. ©(2011) Trans Tech Publications.
语种：
英文
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Testing of strength parameters and deformation parameters of surrounding rock and their distributions
作者：
Yan Chun Ling* ;Ding De Xin;Tang Yi Qun;Bi Zhong Wei
期刊：
Advanced Materials Research ,2011年261-263:1360-1364 ISSN：1022-6680
通讯作者：
Yan Chun Ling
作者机构：
[Yan Chun Ling; Tang Yi Qun] Tongji Univ, Minist Educ, Key Lab Geotech & Underground Engn, Shanghai 200092, Peoples R China.;[Yan Chun Ling; Tang Yi Qun] Tongji Univ, Dept Geotech Engn, Shanghai 200092, Peoples R China.;[Bi Zhong Wei; Ding De Xin] Univ South China, Sch Nuclear Resources & Safety Engn, Hengyang 421001, Peoples R China.
通讯机构：
[Yan Chun Ling] T;Tongji Univ, Minist Educ, Key Lab Geotech & Underground Engn, Shanghai 200092, Peoples R China.
会议名称：
International Conference on Civil Engineering and Building Materials (CEBM)
会议时间：
JUL 29-31, 2011
会议地点：
Kunming, PEOPLES R CHINA
会议主办单位：
[Yan Chun Ling;Tang Yi Qun] Tongji Univ, Minist Educ, Key Lab Geotech & Underground Engn, Shanghai 200092, Peoples R China.^[Yan Chun Ling;Tang Yi Qun] Tongji Univ, Dept Geotech Engn, Shanghai 200092, Peoples R China.^[Ding De Xin;Bi Zhong Wei] Univ South China, Sch Nuclear Resources & Safety Engn, Hengyang 421001, Peoples R China.
会议论文集名称：
Advanced Materials Research
关键词：
Mechanical parameters;Probability distributions;Underground chamber;Wall rock
摘要：
Cores were taken from the hanging wall of the III-1 ore body at Kangjiawan Lead, Zinc and Gold Mine. 50 samples for compression and tension tests were fabricated. 50 compressive and 50 tensile strength values were obtained by RMT-150B testing systems. The probability distributions for the compressive and tensile strength were tested by the hypothesis test method. It proves that uniaxial compressive strength follows normal distribution and tensile strength follows the lognormal distribution. And it proves that elastic modulus and Poson's ratio follow normal distribution. 50 pairs of cohesion and internal friction angle were obtained by randomly drawing a uniaxial compressive and tensile strength samples from 50 measured values. Cohesion follows lognormal distribution and internal friction angle follows normal distribution through hypothesis test method. With the results, some references can be conveniently provided for prediction of the strength and distribution of similar rocks in related geotechnical projects. ©(2011) Trans Tech Publications, Switzerland.
语种：
英文
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无底柱分段崩落法采场稳定性分析
作者：
陶干强;任青云;罗辉;刘振东
期刊：
岩土力学 ,2011年32(12):3768-3772+3779 ISSN：1000-7598
通讯作者：
Tao, G.-Q.(nhutgq@126.com)
作者机构：
[刘振东; 陶干强; 罗辉; 任青云] School of Nuclear Resources and Nuclear Fuel Engineering, University of South China, Hengyang, Hunan 421001, China
通讯机构：
School of Nuclear Resources and Nuclear Fuel Engineering, University of South China, China
关键词：
无底柱分段崩落法;结构参数;有限元数值模拟;采场稳定性
摘要：
无底柱分段崩落法是国内外地下矿山广泛采用的采矿方法.长期以来由于受凿岩、装药以及出矿设备的制约,国内矿山大多采用小结构参数的无底柱分段崩落法,所产生的地压问题十分严重,开采效率低.近年来无底柱分段崩落法朝着增大采场结构参数的方向发展,不但有利于改善采场稳定性,同时还降低了生产成本.因此,开展采场稳定性分析有利于实现安全、高效开采.采用三维有限元方法对10 m×10 m、15 m×15 m、15 m×20 m共3种不同结构参数的崩落法采场进行了数值模拟,对进路开挖与矿石回采两个不同过程的巷道项板竖直位移、主应力进行分析.数值计算结果表明:进路开挖时15 m×20 m与10 m×10 m的结构参数相比较,巷道顶板的竖直位移降低了20.1％,最小主应力下降了约18.8％；开采过程中顶板的竖直位移、主应力值都比进路开挖时小,采场地压得到改善;进路开挖与矿石回采过程巷道顶板的竖直位移和主应力值都随着结构参数的增大而降低.因此,大结构参数能更好地改善采场地压,增强采场稳定性,采用大结构参数的无底柱分段崩落法是安全可行的.
语种：
中文
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Fractal growth of minerals: A modified DLA model
作者：
Xie Yanshi* ;Tu Cairong;Tan Kaixuan;Chen Liang
期刊：
Advanced Materials Research ,2011年239-242:1470-1473 ISSN：1022-6680
通讯作者：
Xie Yanshi
作者机构：
[Xie Yanshi; Tan Kaixuan; Chen Liang] Univ South China, Sch Nucl Resource & Nucl Fuel Engn, Hengyang 421001, Hunan, Peoples R China.;[Tu Cairong] Univ South China, Design & Arts Coll, Hengyang 421001, Hunan, Peoples R China.
通讯机构：
[Xie Yanshi] U;Univ South China, Sch Nucl Resource & Nucl Fuel Engn, Hengyang 421001, Hunan, Peoples R China.
会议名称：
International Conference on Chemical Engineering and Advanced Materials
会议时间：
MAY 28-30, 2011
会议地点：
Changsha, PEOPLES R CHINA
会议主办单位：
[Xie Yanshi;Tan Kaixuan;Chen Liang] Univ South China, Sch Nucl Resource & Nucl Fuel Engn, Hengyang 421001, Hunan, Peoples R China.^[Tu Cairong] Univ South China, Design & Arts Coll, Hengyang 421001, Hunan, Peoples R China.
会议论文集名称：
Advanced Materials Research
关键词：
Modified DLA model;Minerals;Fractal growth
摘要：
A modified fractal growth model of minerals was considered in the square lattice 300 × 300. One seed is placed at the center of the square lattice as a growth focus and the attraction domain is set to diamond. Three main parameters are considered in this model which probability of the surface adhesion is Pg with the range of 0 to 99% to eliminate the noise impact and adsorption distance d varies from 0 to 9 units on behalf of the gravitational field strength between particles and fill gaps s varied from 0.00 to 5.00 units distance to perform the influence of environmental temperature on the minerals growth system. Three model sets are carried out with two fixed parameters and the other changed parameter. The results show the fractal dimension of DLA group increase with the decrease of Pg and the increases of d and s, as well as the structure of minerals from disseminated, star or radial gradual transition to agglomerate. The model is a two-dimensional simulation for three-dimensional fractal growth and can not fully reflect the complex growth dynamics of mineral aggregate in three-dimensional confined space.
语种：
英文
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Lime Brust of Sintering Bricks of Purple Sandy Shale: the Effect of Limestone Particle Size
作者：
Feng, Zhigang* ;Tang, Zhenping;Li, Huijuan
期刊：
Advanced Materials Research ,2011年250-253(1-4):46-49 ISSN：1022-6680
通讯作者：
Feng, Zhigang
作者机构：
[Feng, Zhigang; Tang, Zhenping; Li, Huijuan] Univ S China, Sch Nucl Resource & Nucl Fuel Engn, Hengyang 421001, Peoples R China.
通讯机构：
[Feng, Zhigang] U;Univ S China, Sch Nucl Resource & Nucl Fuel Engn, Hengyang 421001, Peoples R China.
会议名称：
1st International Conference on Civil Engineering, Architecture and Building Materials (CEABM 2011)
会议时间：
JUN 18-20, 2011
会议地点：
Haikou, PEOPLES R CHINA
会议主办单位：
[Feng, Zhigang;Tang, Zhenping;Li, Huijuan] Univ S China, Sch Nucl Resource & Nucl Fuel Engn, Hengyang 421001, Peoples R China.
会议论文集名称：
Advanced Materials Research
关键词：
Sintering brick;Lime brust;Purple sandy shale;Limestone;Particle size
摘要：
Simulating current sintering process in local brickkilns, Hengyang region, Hunan Province, China, at 800 degrees C, througt indoor sintering experiment on a series of brick samples of purple sandy shale, in which particle sizes of limestone are >-1 Phi, >0 Phi, >1 Phi, >2 Phi, >3 Phi and >4 Phi, respectively, it is concluded that the following: (1) Limestone granularity is a crucial factor affecting the quality of sintering bricks of purple sandy shale. Under different particle sizes, the critical content of limestone causing lime brust of sintering bricks is distinct, and lowers with the increasing in limestone granularity. (2) When limestone granularity is different, its impact way on the quality of sintering bricks is also distinct. The more coarse limestone granularity is, the more concentrative the swelling stress produced by the hydration of free CaO is, the more easily lime brust occurs. On the contrary, the more fine limestone granularity is, the more dispersive the swelling stress is, there is the more help to reduce or eliminate the occurrence of lime brust. (3) In view of the relationship between limestone granularity and the critical content of limestone giving rise to lime brust of sintering bricks, the production practice can be effectively guided.
语种：
英文
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Screening of plant species for phytoremediation of uranium, thorium, barium, nickel, strontium and lead contaminated soils from a uranium mill tailings repository in South China
作者：
Li, Guang-yue;Hu, Nan;Ding, De-xin* ;Zheng, Ji-fang;Liu, Yu-long;...
期刊：
Bulletin of Environmental Contamination and Toxicology ,2011年86(6):646-652 ISSN：0007-4861
通讯作者：
Ding, De-xin
作者机构：
[Li, Guang-yue; Liu, Yu-long; Nie, Xiao-qin; Hu, Nan; Zheng, Ji-fang; Ding, De-xin; Wang, Yong-dong] Univ S China, Key Discipline Lab Natl Def Biol Technol Uranium, Hengyang 421001, Hunan, Peoples R China.
通讯机构：
[Ding, De-xin] U;Univ S China, Key Discipline Lab Natl Def Biol Technol Uranium, Hengyang 421001, Hunan, Peoples R China.
关键词：
Uranium;Thorium;Hyperaccumulator;Mill tailings;Phytoremediation factor
摘要：
The concentrations of uranium, thorium, barium, nickel, strontium and lead in the samples of the tailings and plant species collected from a uranium mill tailings repository in South China were analyzed. Then, the removal capability of a plant for a target element was assessed. It was found that Phragmites australis had the greatest removal capabilities for uranium (820 μg), thorium (103 μg) and lead (1,870 μg). Miscanthus floridulus had the greatest removal capabilities for barium (3,730 μg) and nickel (667 μg), and Parthenocissus quinquefolia had the greatest removal capability for strontium (3,920 μg). In this study, a novel coefficient, termed as phytoremediation factor (PF), was proposed, for the first time, to assess the potential of a plant to be used in phytoremediation of a target element contaminated soil. Phragmites australis has the highest PFs for uranium (16.6), thorium (8.68), barium (10.0) and lead (10.5). Miscanthus floridulus has the highest PF for Ni (25.0). Broussonetia papyrifera and Parthenocissus quinquefolia have the relatively high PFs for strontium (28.1 and 25.4, respectively). On the basis of the definition for a hyperaccumulator, only Cyperus iria and Parthenocissus quinquefolia satisfied the criteria for hyperaccumulator of uranium (36.4 μg/g) and strontium (190 μg/g), and could be the candidates for phytoremediation of uranium and strontium contaminated soils. The results show that the PF has advantage over the hyperaccumulator in reflecting the removal capabilities of a plant for a target element, and is more adequate for assessing the potential of a plant to be used in phytoremediation than conventional method. © 2011 Springer Science+Business Media, LLC.
语种：
英文
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Production of zinc and lead concentrates from lean oxidized zinc ores by alkaline leaching followed by two-step precipitation using sulfides
作者：
Liu, Qing* ;Zhao, Youcai;Zhao, Guodong
期刊：
Hydrometallurgy ,2011年110(1-4):79-84 ISSN：0304-386X
通讯作者：
Liu, Qing
作者机构：
[Liu, Qing] Univ S China, Sch Urban Construct, Hengyang 421001, Peoples R China.;[Zhao, Youcai; Liu, Qing] Tongji Univ, State Key Lab Pollut Control & Resource Reuse, Shanghai 200092, Peoples R China.;[Zhao, Guodong] Univ S China, Sch Nucl Resources & Nucl Fuel Engn, Hengyang 421001, Peoples R China.
通讯机构：
[Liu, Qing] U;Univ S China, Sch Urban Construct, Hengyang 421001, Peoples R China.
关键词：
Alkaline;Concentrate;Precipitation;Sodium sulfide
摘要：
An integrated hydrometallurgical process for the production of zinc and lead concentrates from lean oxidized zinc ores by alkaline leaching, followed by two-step sulfide precipitation of lead and zinc sulfides, is developed. The lean zinc oxidized ore was firstly ground to a size below 0.2 mm, followed by alkaline leaching at 90 °C for 120 min in NaOH solution, in which both zinc and lead are effectively extracted. Lead concentrates were then highly selectively and quantitatively produced from the leach solution by adding sodium sulfide as precipitant. Zinc concentrates were obtained in the same way from the Pb-free solution. Optimum conditions of lead precipitation were found to be 1.8 Na<inf>2</inf>S•9H<inf>2</inf>O/Pb weight ratio, 90 °C, 60 min and those for zinc precipitation were 2.4 Na<inf>2</inf>S•9H<inf>2</inf>O/Zn weight ratio, 90 °C, 180 min. Finally, a scale-up experiment was carried out and found that the lead and zinc total extraction both reached above 80% calculated from the ores and the quality of lead and zinc concentrates can meet industrial requirements for roasting processes. Meanwhile, it was found that the loss of NaOH is negligible and the main consumption of chemicals was that of sodium sulfide. ©2011 Elsevier Inc. All rights reserved.
语种：
英文
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Biosorption behavior of U(VI) in wastewater containing U(VI) by Immobilized Saccharomyces Cerevisiae
作者：
Peng, Guowen* ;Ding, Dexin
期刊：
Advanced Materials Research ,2011年335-336:1489-1492 ISSN：1022-6680
通讯作者：
Peng, Guowen
作者机构：
[Ding, Dexin; Peng, Guowen] Univ S China, Key Discipline Lab Natl Def Biotechnol Uranium Mi, Hengyang 421001, Hunan, Peoples R China.
通讯机构：
[Peng, Guowen] U;Univ S China, Key Discipline Lab Natl Def Biotechnol Uranium Mi, Hengyang 421001, Hunan, Peoples R China.
会议名称：
International Conference on Materials and Products Manufacturing Technology (ICMPMT 2011)
会议时间：
OCT 28-30, 2011
会议地点：
Chengdu, PEOPLES R CHINA
会议主办单位：
[Peng, Guowen;Ding, Dexin] Univ S China, Key Discipline Lab Natl Def Biotechnol Uranium Mi, Hengyang 421001, Hunan, Peoples R China.
会议论文集名称：
Advanced Materials Research
关键词：
Biosorption;Immobilized;Saccharomyces Cerevisiae;U(VI)
摘要：
In this study, Immobilized Saccharomyces Cerevisiae (ISC) was prepared through sodium alginate embedding gelatin method after the dry cells had been cross-linked by formaldehyde. The influences of solution pH, initial U(VI) concentration, and contact time on U(VI) biosorption were studied. The optimal U(VI) adsorption conditions was observed at pH 7.0, initial U(VI) concentration 60 mg.L-1 biosorbent dose biosorption equilibrium was established in 1.5h.
语种：
英文
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基于随机介质放矿理论的端部放矿贫化损失计算
作者：
刘振东;陶干强;任青云;杨冬生
期刊：
煤炭学报 ,2011年36(4):572-576 ISSN：0253-9993
通讯作者：
Tao, G.-Q.(nhutgq@126.com)
作者机构：
[杨冬生; 刘振东; 任青云; 陶干强] School of Nuclear Resources and Nuclear Fuel Engineering, University of South China, Hengyang 421001, China
通讯机构：
School of Nuclear Resources and Nuclear Fuel Engineering, University of South China, China
关键词：
随机介质放矿理论;无底柱分段崩落法;贫化率;损失率;端部放矿
摘要：
分析了无底柱分段崩落法端部放矿时矿石损失贫化的原因以及损失率和贫化率计算中存在的问题,采用随机介质放矿理论,视端部放矿时的放出体为旋转体,推导了端部放矿时贫化率和损失率的计算公式。测量出矿岩散体流动参数后,根据该计算公式,可给出不同放矿方式下的贫化率和损失率。结合一具体工程实例,计算了该矿山端部放矿时的理论损失率和贫化率,并与现场实践结果进行了对比。对比结果表明,理论预测值与实际值基本相符,说明所建立的贫化率与损失率的计算公式符合实际情况。
语种：
中文
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