| 不同膨润土对含镉废水的吸附性能 |
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| 引用本文： | 仇欢, 王风贺, 李卉, 陈亚君, 赵斌. 不同膨润土对含镉废水的吸附性能[J]. 环境工程学报, 2016, 10(11): 6513-6518. doi: 10.12030/j.cjee.201506149 |
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| 作者姓名： | 仇欢 王风贺 李卉 陈亚君 赵斌 |
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| 作者单位： | 1. 南京师范大学环境学院, 南京 210023; 2. 江苏省物质循环与污染控制重点实验室, 南京 210023; 3. 江苏省地理信息资源开发与利用协同创新中心, 南京 210023 |
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| 基金项目： | 国家自然科学基金资助项目（41473071） 江苏省科技支撑计划项目（BE2012758） 江苏省太湖水环境治理科研项目（TH2013208） |
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| 摘 要： | 研究了不同投加量和吸附时间时，钠基膨润土、钙基膨润土和高胶质价钙基膨润土对含镉废水中Cd2+的吸附特性。研究结果表明，在相同投加量时钙基膨润土对Cd2+的吸附性能最佳，吸附可在30 min达到平衡。3种膨润土-Cd2+吸附体系中，Freundlich模型对钠基膨润土-Cd2+吸附体系的拟合较好。由膨润土对Cd2+的吸附动力学可知，该吸附过程符合准二级动力学。
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| 关 键 词： | 膨润土 吸附 含镉废水 |
| 收稿时间： | 2015-08-03 |
Adsorption characteristics of Cd2+-containing wastewater onto different bentonites |
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| QIU Huan, WANG Fenghe, LI Hui, CHEN Yajun, ZHAO Bin. Adsorption characteristics of Cd2+-containing wastewater onto different bentonites[J]. Chinese Journal of Environmental Engineering, 2016, 10(11): 6513-6518. doi: 10.12030/j.cjee.201506149 |
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| Authors: | QIU Huan WANG Fenghe LI Hui CHEN Yajun ZHAO Bin |
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| Affiliation: | 1. School of Environment, Nanjing Normal University, Nanjing 210023, China; 2. Jiangsu Key Laboratory of Material Cycle and Pollution Control, Nanjing 210023, China; 3. Jiangsu Center for Collaborative Innovation in Geographical Information Resource Development and Application, Nanjing 210023, China |
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| Abstract: | The influence of bentonite dosage and adsorption time on the adsorption of Cd2+-containing wastewater on three kinds of bentonite clay (sodium bentonite, calcium bentonite, and calcium bentonite with a high colloidal index) was extensively investigated. Calcium bentonite exhibited a higher removal efficiency for Cd2+, reaching its adsorption equilibrium at 30 min. In addition, the adsorption behavior of sodium bentonite for Cd2+ adsorption could be described using the Freundlich isotherm model. Finally, analysis of the adsorption dynamics indicated that the experimental data of the three bentonite clays fit well to the pseudo-second-order model. |
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| Keywords: | bentonite adsorption Cd2+-containing wastewater |
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