| 可渗透反应墙对重金属离子Pb~(2+)、Cd~(2+)吸附效果的试验研究 |
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| 引用本文： | 林达红,徐文炘,张静,肖筱瑜,黎朝.可渗透反应墙对重金属离子Pb~(2+)、Cd~(2+)吸附效果的试验研究[J].矿产与地质,2016(1):132-134. |
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| 作者姓名： | 林达红 徐文炘 张静 肖筱瑜 黎朝 |
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| 作者单位： | 中国有色桂林矿产地质研究院有限公司，广西 桂林 541004; 广西环境污染控制理论与技术重点实验室，广西 桂林 541004; 广西环境治理工程技术研究中心，广西 桂林 541004 |
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| 基金项目： | 广西科学研究与技术开发计划项目“典型岩溶型尾矿库重金属污染阻隔净化技术示范”(桂科重1298002-7)，“广西特聘专家”专项经费资助。 |
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| 摘 要： | 以受尾矿库渗滤液重金属离子Pb2+、Cd2+污染的地下水为研究对象,用天然矿物材料红辉沸石与膨润土作为反应渗透墙(PRB)的活性介质填充材料,试验结果表明,膨润土∶红辉沸石=1∶7,PRB渗透系数处于10-4cm/s数量级且随时间下降最为缓慢;PRB对单一组分Pb2+和单一组分Cd2+去除率分别达99.95%和99.995%;但在双组分PRB体系中,重金属离子Pb2+的存在显著地抑制了PRB对Cd2+的吸附作用,优先选择性吸附顺序是Pb2+Cd2+。
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| 关 键 词： | 反应渗透墙 重金属 渗透系数 红辉沸石 膨润土 |
An experimental study on the absorption effect of permeable reactive barrier on heavy metal ions Pb2+ and Cd2+ |
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| Abstract: | This paper focused on the ground water which was contaminated by heavy metal ions like Pb2 + and Cd2 + of leachate from tailings pond,and utilized natural mineral materials such as stellerite and bentonite as active medium filling materials of permeable reactive barrier (PRB).The test results indicated that as ben-tonite and stellerite was mixed at the ratio of 1 ∶ 7,the order of magnitude of permeability coefficient is 10 -4 cm/s and the declining rate over time was the lowest.The removal rates of the single component Pb2 +and Cd2 + by PRB were 99.95% and 99.995% respectively.In the bi-component system of PRB,the absorp-tion effect of PRB on Cd2 + was significantly suppressed by the existence of Pb2 + .The priority order of pre ferential adsorption sequence is Pb2 + >Cd2 + . |
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| Keywords: | permeable reactive barrier heavy metal permeability coefficient stellerite bentonite |
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