酸改性凹凸棒土处理含铜废水的试验研究  

Experimental study on adsorption of copper containing wastewater by modified attapulgite

作　　者：石万里 赵泽华[2] 叶飞 许元顺 SHI Wanli;ZHAO Zehua;YE Fei;XU Yuanshun(Powerchina Huadong Engineering Corporation Limited,Hangzhou 311122,China;Nanjing Institute of Environmental Sciences of the Ministry of Environmental Protection,Nanjing 210042,China)

机构地区：[1]中国电建集团华东勘测设计研究院有限公司,浙江杭州311122 [2]环境保护部南京环境科学研究所,江苏南京210042

出　　处：《环境工程技术学报》2018年第2期169-175,共7页Journal of Environmental Engineering Technology

摘　　要：通过酸改性凹凸棒土处理含铜废水试验,研究了酸改性凹凸棒土对含铜废水的吸附性能、吸附过程、吸附热力学、吸附动力学及影响因素。结果表明:在1 mol/L的盐酸改性条件下,凹凸棒土的吸附效率较改性前提升38.61%,酸改性能活化凹凸棒土,显著提高其吸附性能。在温度为20℃,铜离子初始浓度为100 mg/L,酸改性凹凸棒土投加量为6 g/L(以铜离子浓度计)的最佳反应条件下,反应25 min后,凹凸棒土对铜离子的去除率达87.57%;凹凸棒土对铜离子的吸附符合一级动力学方程(R^2为0.929)与Redlich-Peterson等温吸附方程(R^2为0.984),表明凹凸棒土的吸附过程属于物理吸附,且随着铜离子初始浓度的提高,凹凸棒土的吸附容量也随之增大。The experiment of adsorption of copper containing wastewater by modified attapulgite was performed to study the adsorption performance,process,thermodynamics,kinetics and its influence factors of modified attapulgite on copper containing wastewater.The results showed that the adsorption efficiency of acid modified attapulgite increased by 38.61%under the condition of 1 mol L HCl,which indicated that the acid modification could activate the pore structure in attapulgite so as to significantly improve the adsorption performance.The maximum removal rate of copper ions by attapulgite could be up to 87.57%at the optimum reaction conditions as follows:the initial copper ion concentration of 100 mg L,at temperature of 20℃and the dosage of acid-modified attapulgite of 6 g L.The adsorption of attapulgite on the copper containing wastewater was in accordance with the first-order kinetic equation and the Redlich-Peterson isotherm equation,and the fitting correlation coefficients R 2 were 0.929 and 0.984 respectively,indicating that the adsorption process of attapulgite could be classified as physical adsorption.With the initial concentration of copper ions increasing,the modified attapulgite has a good adsorption effect on copper containing wastewater.

关 键 词：含铜废水 改性凹凸棒土 吸附 

分 类 号：X703[环境科学与工程—环境工程]