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›› 2009, Vol. 9 ›› Issue (6): 1109-1114.

• 过程与工艺 • 上一篇    下一篇

高铁酸钾处理含砷废水

蒋国民 王云燕 柴立元 舒余德 王庆伟 陈润华   

  1. 中南大学冶金科学与工程学院 中南大学冶金科学与工程学院 中南大学冶金科学与工程学院 中南大学冶金科学与工程学院 中南大学冶金科学与工程学院 中南大学冶金科学与工程学院
  • 收稿日期:2009-08-04 修回日期:2009-09-24 出版日期:2009-12-20 发布日期:2009-12-20
  • 通讯作者: 柴立元

Treatment of Arsenic-containing Wastewater by Potassium Ferrate

JIANG Guo-min WANG Yun-yan CHAI Li-yuan SHU Yu-de WANG Qing-wei CHEN Run-hua   

  1. School of Metallurgical Science and Engineering, Central South University College of Metallurgical Science and Engineering, Central South University College of Metallurgical Science and Engineering, Central South University College of Metallurgical Science and Engineering, Central South University College of Metallurgical Science and Engineering, Central South University College of Metallurgical Science and Engineering, Central South University
  • Received:2009-08-04 Revised:2009-09-24 Online:2009-12-20 Published:2009-12-20
  • Contact: CHAI Li-yuan

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被引次数

74

摘要： 基于对K2FeO4氧化As(III)热力学平衡及As(III)氧化过程氧转移机理的研究，利用高铁酸钾氧化-絮凝一体化工艺处理100 mg/L模拟含砷废水，考察了Fe/As质量比、pH值、反应温度、反应时间等因素对砷去除效果的影响. 结果表明，最优工艺条件为Fe/As质量比3，pH值6，温度25℃，时间30 min，处理后出水的As浓度低于10 mg/L，达到《生活饮用水卫生标准》(GB5749-2006).

关键词: 含砷废水, 热力学平衡, 高铁酸钾, 氧化-絮凝

Abstract: Equilibrium equations and principle of thermodynamics were derived and investigated on oxidization of trivalent arsenic by ferrate. It was considered that the trivalent arsenic was oxidized by ferrate via the direct oxygen transfer from ferrate. Arsenic-containing wastewater (100.0 mg/L) was treated by oxidation-flocculation process with ferrate, and the effects of Fe/As mass ratio, pH value, temperature and reaction time on removal rate of arsenic were studied. The results show that the optimum conditions were Fe/As mass ratio of 3, pH value of 5~7, temperature of 25℃ and oxidation time of 30 min. The concentration of treated arsenic-containing wastewater was lower than 10 mg/L, which qualifies health standard for domestic drinking water (GB5749-2006).

Key words: arsenic-containing wastewater, thermodynamic equilibrium, ferrate, oxidation-flocculation

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