| 皂土对CuCl2的吸附性能 |
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| 引用本文： | 臧运波,侯万国,刘瑛. 皂土对CuCl2的吸附性能[J]. 环境工程学报, 2012, 6(6): 1785-1789 |
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| 作者姓名： | 臧运波 侯万国 刘瑛 |
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| 作者单位： | 1. 商丘师范学院化学系,商丘,476000
2. 山东大学胶体与界面化学教育部重点实验室,济南,250100 |
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| 基金项目： | 国家重大基础研究(973)计划(2004CB418504)；国家自然科学基金资助项目(20573065)；河南省教育厅自然科学研究计划项目(2010B150021) |
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| 摘 要： | 研究了CuCl2在荷结构负电荷皂土上的吸附性能,考察了pH、无机以及有机添加剂等因素的影响,并结合IR和XRD实验结果探讨了吸附机理。研究表明,皂土对CuCl2有很强的吸附能力,其吸附动力学和吸附等温线分别符合准二级速率方程和Langmuir方程。初始pH增大,吸附量增加。无机以及有机添加剂均能能明显抑制吸附。Cu2+在皂土上的吸附层在微观上可分为因化学键合作用而形成的内络合层和因静电作用而形成的外络合层。
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| 关 键 词： | 皂土 氯化铜 吸附 |
Adsorption behavior of CuCl2 on bentonite |
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| Zang Yunbo,Hou Wanguo and Liu Ying. Adsorption behavior of CuCl2 on bentonite[J]. Techniques and Equipment for Environmental Pollution Control, 2012, 6(6): 1785-1789 |
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| Authors: | Zang Yunbo Hou Wanguo Liu Ying |
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| Affiliation: | 1(1.Department of Chemistry,Shangqiu Normal College,Shangqiu 476000,China; 2.Key Laboratory for Colloid & Interface Chemistry of Education Ministry,Shandong University,Jinan 250100,China) |
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| Abstract: | Adsorption properties of CuCl2 on bentonite were studied,the influence of initial solution pH,additives of inorganic electrolytes and organic ligands on the adsorption were investigated,and the adsorption mechanism was discussed in combination with the results of IR and XRD experiments.It was found that the bentonite shows good adsorption ability for Cu2+ from solution.The adsorption kinetics and the adsorption isotherms of Cu2+ on the bentonite can be described by the pseudo-second order kinetic and Langmuir isotherm,respectively.With increasing pH,the adsorption amount increases.The additives can obviously restrain the adsorption of Cu2+ on the bentonite.The adsorption layer of Cu2+ on the bentonite can be divided into two parts: the inner-sphere surface complexes arising from the chemical binding and the outer-sphere surface complexes arising from the electrostatic interaction. |
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| Keywords: | bentonite CuCl2 adsorption |
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