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天然磁黄铁矿吸附水中As(Ⅲ)的性能及机理

关梦莎 罗黎煜 沈思文 周立松 邱江坤 李睿华

关梦莎, 罗黎煜, 沈思文, 周立松, 邱江坤, 李睿华. 天然磁黄铁矿吸附水中As(Ⅲ)的性能及机理[J]. 环境工程, 2021, 39(2): 33-40. doi: 10.13205/j.hjgc.202102006
引用本文: 关梦莎, 罗黎煜, 沈思文, 周立松, 邱江坤, 李睿华. 天然磁黄铁矿吸附水中As(Ⅲ)的性能及机理[J]. 环境工程, 2021, 39(2): 33-40. doi: 10.13205/j.hjgc.202102006
GUAN Meng-sha, LUO Li-yu, SHEN Si-wen, ZHOU Li-song, QIU Jiang-kun, LI Rui-hua. ADSORPTION PERFORMANCE AND MECHANISM OF NATURAL PYRRHOTITE FOR As (Ⅲ) IN WATER[J]. ENVIRONMENTAL ENGINEERING , 2021, 39(2): 33-40. doi: 10.13205/j.hjgc.202102006
Citation: GUAN Meng-sha, LUO Li-yu, SHEN Si-wen, ZHOU Li-song, QIU Jiang-kun, LI Rui-hua. ADSORPTION PERFORMANCE AND MECHANISM OF NATURAL PYRRHOTITE FOR As (Ⅲ) IN WATER[J]. ENVIRONMENTAL ENGINEERING , 2021, 39(2): 33-40. doi: 10.13205/j.hjgc.202102006

天然磁黄铁矿吸附水中As(Ⅲ)的性能及机理

doi: 10.13205/j.hjgc.202102006
基金项目: 

国家自然科学基金重大项目(0211-136040)。

详细信息
    作者简介:

    关梦莎(1995-),女,硕士,主要研究方向为地下水污染处理及修复。guanmsha@163.com

    通讯作者:

    李睿华(1967-),男,博士,副教授,主要研究方向为水污染控制及修复。liruihua@nju.edu.cn

ADSORPTION PERFORMANCE AND MECHANISM OF NATURAL PYRRHOTITE FOR As (Ⅲ) IN WATER

  • 摘要: 砷是地下水中最常见的污染物之一,过量摄入会严重危害人体健康。含铁矿物可以高效去除水中的As。以天然磁黄铁矿为As(Ⅲ)吸附剂,研究了吸附过程中的动力学、等温线和热力学,以及pH、无机阴离子对As(Ⅲ)吸附去除的影响。结果表明:磁黄铁矿对As(Ⅲ)的吸附在48 h可达到平衡;吸附过程符合Langmuir等温模型,在As(Ⅲ)初始浓度为1~200 mg/L,23~33 ℃下,天然磁黄铁矿对As(Ⅲ)的饱和吸附量(以As计)为3.5~4.5 mg/g;吸附量随着温度升高而增大,吸附过程表现为自发吸热熵增反应;在pH为7时,吸附效果达到最佳去除率(95.51±0.30)%;PO43-对吸附有明显的抑制作用。X射线电子能谱分析表明,吸附过程包括物理吸附和化学吸附,即包括矿物自身缺陷结构导致的位点吸引、As和S配位离子交换及氧化还原产物羟基氧化铁的配位沉淀。表明利用磁黄铁矿吸附As(Ⅲ),简化了传统材料和方法上将As(Ⅲ)氧化为As(Ⅴ)的烦琐步骤,有较好应用前景。
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  • 收稿日期:  2020-04-11
  • 网络出版日期:  2021-07-19

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