DNNSA反胶团萃取净化电镀废水中镍的动力学
Kinetics of Reverse Micelles Extraction of Nickel from Electroplating Wastewater Using Dinonylnaphthalene Sulfonic Acid
作者：余静(成都信息工程学院 资源环境学院)；邱海浪(成都信息工程学院 资源环境学院)；夏雪(成都信息工程学院 资源环境学院)；江洪龙(成都信息工程学院 资源环境学院)；汪嘉杨(成都信息工程学院 资源环境学院)；叶芝祥(成都信息工程学院 资源环境学院)；杨迎春(成都信息工程学院 资源环境学院)；张雪乔(成都信息工程学院 资源环境学院)
Author：Yu Jing(College of Resources and Environment,Chengdu Univ. of Info. Technol.)；Qiu Hailang(College of Resources and Environment,Chengdu Univ. of Info. Technol.)；Xia Xue(College of Resources and Environment,Chengdu Univ. of Info. Technol.)；Jiang Honglong(College of Resources and Environment,Chengdu Univ. of Info. Technol.)；Wang Jiayang(College of Resources and Environment,Chengdu Univ. of Info. Technol.)；Ye Zhixiang(College of Resources and Environment,Chengdu Univ. of Info. Technol.)；Yang Yingchun(College of Resources and Environment,Chengdu Univ. of Info. Technol.)；Zhang Xueqiao(College of Resources and Environment,Chengdu Univ. of Info. Technol.)
收稿日期：2013-08-05 年卷（期）页码：2014,46(1):153-158
期刊名称：工程科学与技术
Journal Name：Advanced Engineering Sciences
关键字：动力学；萃取；反胶团；镍；废水；二壬基萘磺酸（DNNSA）
Key words：kinetics;extraction;reverse micelles;Nickel;wastewater;dinonylnaphthalene sulfonic acid（DNNSA）
基金项目：国家自然科学基金资助项目(51209024)
中文摘要
采用恒界面池研究了二壬基萘磺酸－煤油体系萃取废水中镍离子的动力学。考察了搅拌转速、界面积、DNNSA浓度、镍离子浓度、温度对萃取速率的影响。实验结果表明：溶液中镍离子的萃取速率在200 r/min时出现与搅拌强度无关的化学反应动力学“坪区”，此时镍离子萃取速率与两相接触面积成正比，说明萃取过程为界面化学反应控制过程。在动力学“坪区”，镍离子萃取速率正比于萃取剂浓度，而与水相中的镍离子浓度无关，且随着温度升高，萃取速率增加，萃取活化能为31.56 kJ/mol。得到了DNNSA萃取废水中镍离子的萃取动力学方程并对萃取机理进行了探讨。
英文摘要
The kinetics of Ni (Ⅱ) extraction by dinonylnaphthalene sulfonic acid (DNNSA) in kerosene from wastewater was investigated using a Lewis Cell. The different parameters affecting the extraction rate such as stirring speed, interfacial area，DNNSA concentration, Ni (Ⅱ) concentration and temperature were separately studied. When stirring speed was more than 200 r/min, there was a chemical reaction kinetic region where the extraction rate of Ni (Ⅱ) was independent of the stirring speed. The experimental results demonstrated that the rate of Ni (Ⅱ) extraction was apparently proportional to the interfacial area between the aqueous phase and the organic phase,indicated that the rate of Ni (Ⅱ) extraction was controlled by a chemical reaction at the interface rather than in the bulk phase. In the kinetic region, the rate of Ni (Ⅱ) extraction was first order for DNNSA, while it zero order with respect to the Ni (Ⅱ). The extraction rate also increased with the increase of extraction temperature. The activation energy of extraction was calculated to be 31.56 kJ/mol and the kinetic equation of Ni (Ⅱ) extraction from wastewater was put forward. The mechanism of Ni (Ⅱ) extraction was proposed.
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