| 改性硅藻土对重金属离子的吸附规律 |
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| 引用本文： | 杨婷,王洪良,吕春欣,熊鹰,何冲,康春莉.改性硅藻土对重金属离子的吸附规律[J].吉林大学学报(理学版),2012,50(4):815-821. |
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| 作者姓名： | 杨婷 王洪良 吕春欣 熊鹰 何冲 康春莉 |
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| 作者单位： | 吉林大学 环境与资源学院, 长春 130012 |
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| 摘 要： | 利用CaCO3对硅藻土矿物进行改性. 研究结果表明: 单组分体系中CaCO3改性的硅藻土对Cu2+,Pb2+,Cd2+和Zn2+的吸附动力学规律均符合伪二阶动力学模型, 吸附热力学规律符合Langmuir模型; 在混合组分体系中, Pb2+,Cd2+和Zn2+的吸附速率降低, Cu2+的吸附速率增加, 对金属离子的吸附动力学规律仍然符合伪二阶动力学模型, 但对金属离子的吸附量均明显降低, 仅Pb2+的吸附热力学规律符合Langmuir模型.
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| 关 键 词： | ,硅藻土,改性,重金属,吸附, |
Adsorption Law of Heavy Metals on Modified Diatomite |
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| YANG Ting
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WANG Hong-liang
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L Chun-xin
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XIONG Ying
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HE Chong
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KANG Chun-li.Adsorption Law of Heavy Metals on Modified Diatomite[J].Journal of Jilin University: Sci Ed,2012,50(4):815-821. |
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| Authors: | YANG Ting WANG Hong-liang L Chun-xin XIONG Ying HE Chong KANG Chun-li |
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| Institution: | College of Environment and Resources, Jilin University, Changchun 130012, China |
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| Abstract: | Rich low-grade diatomite mineral was modified with calcium carbonate so as to improve the adsorption properties of diatomite for heavy metal ions.The results show that in a single component system,the dynamic laws for the adsorption of Cu2+,Pb2+,Cd2+and Zn2+ on the diatomite modified by calcium carbonate obey the pseudo-second-order model and the adsorption thermodynamics laws obey the Langmuir model.In a mixed component system,because of the effect of coexisting components,the adsorption rate of Pb2+,Cd2+ and Zn2+ was decreased respectively and the adsorption rate of Cu2+ was increased,but the adsorption dynamic laws of four kinds of metal ions still obey the pseudo-second-order model;at the same time,the adsorption capacities of four kinds of metal ions on the modified diatomite were decreased obviously and only the adsorption thermodynamics law of Pb2+ obeys the Langmuir model. |
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| Keywords: | diatomite modified heavy metals adsorption |
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