| 改性氢氧化镁对地下水中铅镉的稳定化性能研究 |
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| 引用本文： | 史弋,张梦玥,李博文,范娇,马秀兰.改性氢氧化镁对地下水中铅镉的稳定化性能研究[J].世界地质,2015,34(1):254-258. |
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| 作者姓名： | 史弋 张梦玥 李博文 范娇 马秀兰 |
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| 作者单位： | 吉林大学 环境与资源学院，长春 130021 |
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| 摘 要： | 为研究OH-缓释剂对铅、镉污染地下水修复的可行性,通过室内实验制备改性氢氧化镁,并对其去除地下水中Pb和Cd的性能进行研究。实验结果表明,重金属的稳定化机理主要为沉淀反应。在去除单一重金属(Pb或Cd)实验中,Pb和Cd的去除率都可达到99%以上,反应符合一级反应动力学,反应速率常数分别为0.173 7 min-1和0.003 7 min-1。改性氢氧化镁在处理Pb和Cd的复合污染时Pb优先于Cd反应,Pb的存在会对Cd的沉淀起到抑制作用。
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| 关 键 词： | 氢氧化镁 铅 镉 稳定化 |
Study on performance of modified magnesium hydroxide to stabilizing lead and cadmium polluted groundwater |
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| SHI Yi,ZHANG Meng-Yue,LI Bo-Wen,FAN Jiao,MA Xiu-Lan.Study on performance of modified magnesium hydroxide to stabilizing lead and cadmium polluted groundwater[J].World Geology,2015,34(1):254-258. |
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| Authors: | SHI Yi ZHANG Meng-Yue LI Bo-Wen FAN Jiao MA Xiu-Lan |
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| Institution: | College of Environment and Ｒesources，Jilin University，Changchun 130021，China |
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| Abstract: | To investigate the feasibility of OH- slow-releasing agent used to remedy lead and cadmium pollu- ted groundwater，modified magnesium hydroxide was prepared in lab，and its feasibility to remedy the lead and cadmium polluted groundwater was studied in this work． The experimental results showed that precipitation was the predominant mechanism of the heavy metals removal． In the experiments for Pb or Cd removal alone，both of their removal efficiencies were over 99%． The reaction followed first- order reaction kinetics; and the observed Pb and Cd reaction rate constant was 0. 173 7 and 0. 003 7， respectively． In the combination system of Pb and Cd， precipitation of lead was prior to cadmium; while the presence of Pb would pose an inhibitive effect on the precipitation of cadmium |
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| Keywords: | magnesium hydroxide lead cadmium stabilization |
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