工业水处理 ›› 2016, Vol. 36 ›› Issue (10): 44-47. doi: 10.11894/1005-829x.2016.36(10).044

• 试验研究 • 上一篇    下一篇

改性铁矾土对废水中砷的吸附效能研究

刘兴旺1,2,3, 陈建宏1, 胡晞2,3   

  1. 1. 中南大学资源与安全工程学院, 湖南长沙 410083;
    2. 湘潭大学环境科学与工程系, 湖南湘潭 411105;
    3. "重金属污染控制"湖南省普通高等学校重点实验室, 湖南湘潭 411105
  • 收稿日期:2016-07-14 出版日期:2016-10-20 发布日期:2016-11-08
  • 作者简介:刘兴旺(1978-),副教授,博士研究生。E-mail:lxwsa@xtu.edu.cn。
  • 基金资助:

    国家水体污染控制与治理科技重大专项(2008ZX07212-001-06)

Research on the adsorption capacity of modified laterite for arsenic in wastewater

Liu Xingwang1,2,3, Chen Jianhong1, Hu Xi2,3   

  1. 1. School of Resources and Safety Engineering, Central South University, Changsha 410083, China;
    2. College of Environmental Science and Engineering, Xiangtan University, Xiangtan 411105, China;
    3. Hunan College Key Laboratory of Heavy Metal Pollution Control, Xiangtan 411105, China
  • Received:2016-07-14 Online:2016-10-20 Published:2016-11-08

摘要:

以天然铁矾土为原料制备得到改性铁矾土除砷吸附剂,考察了反应时间、pH、竞争离子对该吸附剂吸附砷效能的影响,并对吸附机理进行了分析。结果表明:该吸附剂对废水中的砷具有较高的吸附效能。在反应时间为60 min内,该吸附剂对砷的吸附呈快速上升趋势;该吸附剂对砷的饱和吸附量可达19.2 mg/g;酸性与中性的pH环境有利于砷的吸附去除;废水中的PO43-与砷存在较强的竞争吸附,而SO42-、NO3-与砷的竞争吸附作用较小。

关键词: 砷, 重金属, 吸附, 改性铁矾土

Abstract:

Natural laterite(ML) has been used as raw materials for the preparation of modified laterite arsenic removing adsorbent. The influences of reaction time,pH and competitive ions on the adsorption capacity of the adsorbent for arsenic are investigated,and the adsorption mechanisms analyzed. The results show that the adsorbent has pretty high adsorbing capacity for arsenic in wastewater. When the reaction is within 60 min,the adsorption capacity of the adsorbent for arsenic increases drastically. The saturated adsorption capacity of the adsorbent for arsenic can reach 19.2 mg/g. Acidic and neutral pH environments are good for the adsorption and removal of arsenic. The existence of PO43- and arsenic in wastewater has strong competitive adsorption,while the competitive adsorption effect of SO42- and NO3- on arsenic is negligible.

Key words: arsenic, heavy metals, adsorption, modified laterite

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