| 膨润土对废水中Cu2+的吸附性能研究 |
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| 引用本文： | 杨萃娜,丁述理. 膨润土对废水中Cu2+的吸附性能研究[J]. 河北工程大学学报(自然科学版), 2011, 28(2): 75-78 |
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| 作者姓名： | 杨萃娜 丁述理 |
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| 作者单位： | 新乡学院 建筑工程系;河北工程大学 河北省资源勘测研究实验室 |
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| 基金项目： | 国家自然科学基金（41072031），河北省自然科学基金（D2009000833） |
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| 摘 要： | 研究了钙基膨润土和钠基膨润土对废水中铜离子的吸附特性.结果表明,钠基膨润土和钙基膨润土的吸附行为都依赖于溶液的pH值,初始离子浓度和吸附剂用量.在低pH值时主要是H+与Cu2+竞争吸附位.pH值在3到7时基本的吸附机制是离子交换的过程.在高pH值(＞8.3)时,在膨润土颗粒表面形成氢氧化铜的吸附或沉淀.随初始金属离子浓...
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| 关 键 词： | Cu2+ 膨润土 吸附 重金属的去除 阳离子交换 |
| 收稿时间： | 2011-03-05 |
Study on adsorption of Cu2+ in wastewater with bentonite |
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| YANG Cui-na and DING Shu-li. Study on adsorption of Cu2+ in wastewater with bentonite[J]. Journal of Hebei University of Engineering(Natural Science Edition), 2011, 28(2): 75-78 |
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| Authors: | YANG Cui-na and DING Shu-li |
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| Affiliation: | Department of Civil Engineering,Xinxiang University,He'nan Xinxiang 453000,China;Laboratory of Resource Exploration Research of Hebei Provice,Hebei University of Engineering, Hebei Handan 056038,China |
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| Abstract: | The effects of removal rate and adsorption capacity on different adsorption conditions were investigated.The results show that the adsorptions of both Na-bentonite and Ca-bentonite strongly depend on the pH,initial concentration and adsorbent amount.At lower pH values,the mechanisms that govern the adsorption behavior of bentonites are competition of the metal ions with the H+.The basic mechanism is an ion exchange process while the pH values range from 3 to 7.At higher pH values(more than 8.3),formation of copper hydroxyl species may result either participation to the adsorption or precipitation onto the bentonites.Increasing initial metal ion concentration led to the decrease of removal rate and increase of unit adsorption of adsorbent.While Cu2+ initial concentration is 40mg/L,Na-bentonite has the removal rate of 98.4% for Cu2+ and Ca-bentonite has the removal rate of 81.2%,respectively.The maximum adsorption capacity of Na-bentonite for Cu2+ is 26 mg/g and Ca-bentonite is 12 mg/g. |
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| Keywords: | Cu2+ bentonite adsorption heavy metal removal cation exchange |
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