| 腐殖土对废水中Cu2+的吸附 |
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| 引用本文： | 吴敏,刘振,朱睿,刘元基.腐殖土对废水中Cu2+的吸附[J].同济大学学报(自然科学版),2013,41(2):240-246. |
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| 作者姓名： | 吴敏 刘振 朱睿 刘元基 |
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| 作者单位： | 1. 同济大学环境科学与工程学院,上海,200092
2. 上海市环境科学研究院,上海,200233 |
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| 基金项目： | 上海市国际科技合作基金(12230700800,062307039) |
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| 摘 要： | 研究了腐殖土对废水中Cu2+的吸附,并考察了吸附时间、Cu2+的初始浓度、腐殖土投加量、初始pH值和温度等因素对吸附过程的影响.通过吸附动力学、吸附等温线和红外光谱(FTIR)等方法探讨了吸附机理.试验条件下,单位腐殖土对Cu2+的吸附量随时间的延长而增加直至达到吸附平衡,随Cu2+的初始浓度增大和初始pH值的上升而增加,随腐殖土投加量的增加而减少,吸附过程温度的影响不显著.腐殖土吸附Cu2+的过程符合Lagergren准二级吸附速率方程和Freundlieh吸附等温方程,吸附过程以化学吸附为主,红外光谱分析表明,参与吸附的主要基团是羟基和芳香基等化学基团.
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| 关 键 词： | 腐殖土 铜离子 吸附 动力学 吸附等温线 红外光谱 |
| 收稿时间： | 1/7/2012 12:00:00 AM |
| 修稿时间： | 2012/11/7 0:00:00 |
Adsorption of Cu2+ in wastewater on Humus Soil |
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| wu min,liu zhen,zhu rui and liu yuan ji.Adsorption of Cu2+ in wastewater on Humus Soil[J].Journal of Tongji University(Natural Science),2013,41(2):240-246. |
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| Authors: | wu min liu zhen zhu rui and liu yuan ji |
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| Institution: | College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China;College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China;Shanghai Academy of Environmental Sciences, Shanghai 200233, China;College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China |
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| Abstract: | A batch test was made to evaluate the adsorption properties of Cu2+ on humus soil. Several factors were studied with regard to their effects on adsorption characteristics, such as adsorption time, initial concentration, humus dosage, initial pH and temperature. Furthermore, the relevant mechanism was studied with assistance of adsorption kinetics, adsorption isotherm and Fourier transform infrared spectoroscopy (FTIR). The results show that the amount of Cu2+ adsorbed on humus soil increases with adsorption time until it reaches equilibrium; it increases with the increase of the initial Cu2+concentration and the initial solution pH value, while it decreases against the increase of humus dosage. The temperature hardly affects the adsorption. The adsorption process follows the pseudo second order model and Freundlich adsorption isotherm equations, and the adsorption process mainly bases on the chemical adsorption. The analysis of FTIR indicates that the main groups involved in adsorption are hydroxyl and aromatic. |
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| Keywords: | humus soil copper adsorption kinetics adsorption isotherm infrared spectroscopy |
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