蒙脱石、铁氧化物及其复合体对水中As（Ⅲ）的吸附效果

doi:10.11934/j.issn.1673-4831.2017.03.008

生态与农村环境学报 ›› 2017, Vol. 33 ›› Issue (3): 252-259.doi: 10.11934/j.issn.1673-4831.2017.03.008

蒙脱石、铁氧化物及其复合体对水中As（Ⅲ）的吸附效果

邓天天^1,2, 马培¹, 李晗晟¹

1. 河南工程学院资源与环境学院, 河南郑州 451191;
2. 河南工程学院煤化工资源综合利用与污染治理河南省工程实验室, 河南郑州 451191

收稿日期:2016-07-05 出版日期:2017-03-25 发布日期:2017-03-25
作者简介:邓天天(1987-)女,河南郑州人,讲师,博士生,主要从事地下水及土壤重金属污染治理。E-mail:280233394@qq.com
基金资助:
河南工程学院博士基金（D2016013）；煤化工资源综合利用与污染治理河南省工程实验室开放基金（502002-A01）

As(Ⅲ) Adsorption Effects of Montmorillonite, Iron Oxides and Their Complex

DENG Tian-tian^1,2, MA Pei¹, LI Han-sheng¹

1. School of Environmental Studies, Henan University of Engineering, Zhengzhou 451191, China;
2. Henan Engineering Laboratory of Pollution Control and Coal Chemical Resources Comprehensive Utilization, Henan Institute of Engineering, Zhengzhou 451191, China

Received:2016-07-05 Online:2017-03-25 Published:2017-03-25

摘要/Abstract

摘要：

利用蒙脱石、FeCl₃·6H₂O制备出改性蒙脱石复合体，并对蒙脱石、铁氧化物及其改性复合体吸附水中As（Ⅲ）的效能进行对比试验。结果表明：这3者对水中As（Ⅲ）的吸附动力学均符合Lagergren速度模型，且均属于Freundlich等温吸附。复合体的沉降效率明显优于其他2种吸附剂，且对含As（Ⅲ）溶液的pH值具有很好调节能力。SO₄^2-和Mg²⁺浓度对As（Ⅲ）的去除基本无影响，Ca²⁺能促进As（Ⅲ）的吸附，NO₃^-、PO₄^3-与As（Ⅲ）存在较强的竞争吸附。

关键词: 蒙脱石, 铁氧化物, 复合体, 砷

Abstract:

A modified montmorillonite complex was prepared out of montmorillonite and FeCl₃·6H₂O, and used in comparison between montmorillonite, iron oxide and the modified complex in adsorption of As(Ⅲ). Results show that the kinetics of the three adsorbents adsorbing As(Ⅲ) in water fit the Lagergren speed equation, and all belong to the sort of Freundlich sorption isotherm. The modified complex is obviously superior to the other two in setting efficiency. Besides, it is capable of regulating pH of the arsenic solution. Competitive adsorption experiments on some common ions come to the conclusion that calcium ion has some positive effect, while magnesium and sulfate has little on removal efficiency of arsenic, and nitrate and phosphate competes vigorously with As(Ⅲ) for adsorption.

Key words: montmorillonite, iron oxide, modified complex, arsenic

中图分类号:

邓天天, 马培, 李晗晟. 蒙脱石、铁氧化物及其复合体对水中As（Ⅲ）的吸附效果[J]. 生态与农村环境学报, 2017, 33(3): 252-259.

DENG Tian-tian, MA Pei, LI Han-sheng. As(Ⅲ) Adsorption Effects of Montmorillonite, Iron Oxides and Their Complex[J]. Journal of Ecology and Rural Environment, 2017, 33(3): 252-259.

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蒙脱石、铁氧化物及其复合体对水中As（Ⅲ）的吸附效果

As(Ⅲ) Adsorption Effects of Montmorillonite, Iron Oxides and Their Complex

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