| 硅藻土和膨润土对重金属离子Zn~（2＋）、Pb~（2＋）及Cd~（2＋）的吸附特性 |
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| 引用本文： | 史明明,刘美艳,曾佑林,苏胜培,成应向.硅藻土和膨润土对重金属离子Zn~（2＋）、Pb~（2＋）及Cd~（2＋）的吸附特性[J].环境化学,2012,31(2):162-167. |
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| 作者姓名： | 史明明 刘美艳 曾佑林 苏胜培 成应向 |
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| 作者单位： | 1. 湖南师范大学化学化工学院,长沙,410081
2. 湖南省环境保护科学研究院,长沙,410004 |
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| 基金项目： | 湘江水环境重金属污染整治关键技术研究与综合示范项目子项(2009ZX07212-001-04)资助 |
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| 摘 要： | 以硅藻土和膨润土作为吸附剂,考察微波加热与否条件下,不同吸附时间、不同吸附剂用量和不同pH值对硅藻土和膨润土分别吸附Zn2＋、Pb2＋、Cd2＋重金属离子的影响.实验结果表明,硅藻土和膨润土对3种重金属离子均有很好的吸附效果,吸附时间对去除率影响不大,数分钟即可达到吸附平衡,微波加热、增加吸附剂用量和提高pH值,都有利于提高3种重金属离子的去除率.
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| 关 键 词： | 硅藻土 膨润土 重金属 吸附 |
Study on adsorption of Zn2+,Pb2+ and Cd2+ on diatomite and bentonite |
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| SHI Mingming,LIU Meiyan,ZENG Youlin,SU Shengpei,CHENG yingxiang.Study on adsorption of Zn2+,Pb2+ and Cd2+ on diatomite and bentonite[J].Environmental Chemistry,2012,31(2):162-167. |
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| Authors: | SHI Mingming LIU Meiyan ZENG Youlin SU Shengpei CHENG yingxiang |
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| Institution: | 1.College of Chemistry and Chemical Engineering,Hunan Normal University,Changsha,410081,China; 2.Hunan Research Academy of Environmental Science,Changsha,410004,China) |
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| Abstract: | In this study diatomite and bentonite were used to adsorb Zn2+,Pb2+and Cd2+.The effect of adsorption time,the mount of adsorbent and pH on adsorption efficiency were investigated with and without microwave heating.The results showed that these three heavy metal ions were removed efficiently by both adsorbents.Adsorption time is not a main factor,and the adsorption equilibrium was reached in a few minutes.Microwave heating,large amount of adsorbent and high pH are beneficial to removal rate. |
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| Keywords: | diatomite bentonite heavy metal adsorption |
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