期刊论文

中文

矿业研究与开发

1005-2763

2020

40

4

122-129

10.13827/j.cnki.kyyk.2020.04.024

10k082:湖南省高等学校科技创新平台开放基金 NC201503801:农业部财政部重大科研专项专题项目

本校为第一机构

采用响应面法研究了铁改性蛭石-腐殖酸复合吸附剂去除As(Ⅲ)的影响因素(吸附时间、吸附剂量、pH、腐殖酸含量在吸附剂中的占比、As(Ⅲ)初始浓度),得到了影响因素对去除率的二次多项式模型和最佳吸附条件,并对吸附行为的吸附动力学与热力学进行了探讨.结果 表明,5个因素均对复合吸附剂吸附As(Ⅲ)的行为有显著影响;吸附最佳条件是:时间235min,吸附剂剂量8.48 g·L-1,pH6.4,腐殖酸占比20％,As(Ⅲ)初始浓度11 mg·L-1,此条件下的最大去除率为96.06％;用Langmuir、Freundlich方程拟合表明,Langmuir拟合结果最好,最大吸附量为3.94 mg·g-1(313 K);吸附动力学研究结果表明,该吸附过程符合准二级动力学模...

The response surface method was used to study the factors affecting the removal of As(Ⅲ)by iron-modified vermiculite and humic acid composite adsorbent(adsorption time,adsorption dose,pH,proportion of humic acid content in adsorbent,as well as As(Ⅲ)initial concentration).The quadratic polynomial model of the influence factors on the removal rate was obtained,as well as the optimal adsorption conditions.Then,the adsorption kinetics and thermodynamics ofadsorption behavior were discussed.The results showed that the five factors all had signific...