凹凸棒土滤料对浓缩液中镍离子的吸附研究  

Study on Adsorption Characteristics of Ni^(2+) from Concentrated Wastewater by Palygorskite Filter from Aqueous Solution

作　　者：万玮 袁瑞庆 徐朦 李佳 WAN Wei;YUAN Rui-qing;XU Meng;LI Jia(New Sky(China)Environmental Science and Technology Co.,Ltd.,Fujian Xiamen 361001;Nanjing Huanmei Technology Co.,Ltd.,Jiangsu Nanjing 210000,China)

机构地区：[1]新源(中国)环境科技有限责任公司,福建厦门361001 [2]南京环美科技股份有限公司,江苏南京210000

出　　处：《广州化工》2021年第9期88-91,115,共5页GuangZhou Chemical Industry

摘　　要：考察了一种新型凹凸棒土滤料对Ni^(2+)的吸附性能。以吸附量、吸附率为评价指标,探究了吸附剂粒径、吸附剂投加量、pH值、温度对吸附效果的影响;通过在不同温度下拟合吸附等温线,研究凹凸棒土滤料对Ni^(2+)的吸附作用。实验结果表明,当吸附剂为粉末状,投加量为0.5 g,pH值在5~6之间时,凹凸棒土滤料对Ni^(2+)的吸附率达到93.7%,且温度越高,平衡吸附量越大;Ni^(2+)吸附过程更符合准二级动力学方程;等温吸附过程更符合Freundlich模型。The adsorption characteristics of Ni^(2+)on palygorskite filter were investigated.With the adsorption capacity and adsorption rate as the evaluation indicators,the effects of adsorbent particle size,adsorbent dose,pH,and temperature on the adsorption effect were studied.Adsorption isotherms were fitted at different temperatures to study the relationship between palygorskite filter and Ni^(2+).The results showed that when the adsorbent was in the form of powder,the dosage was 0.5 g,and the pH value was between 5 and 6,the adsorption rate of Ni^(2+)by the palygorskite filter reached 93.7%;as the temperature rise,the equilibrium adsorption capacity also increased.In addition,the adsorption process was more consistent with the quasi-second-order model;the isothermal adsorption process was more consistent with the Freundlich model.

关 键 词：凹凸棒土滤料 镍离子 吸附等温线 动力学方程 热力学方程 

分 类 号：X703[环境科学与工程—环境工程]