高铁酸钾处理含砷废水  

Treatment of Arsenic-containing Wastewater by Potassium Ferrate

作　　者：蒋国民[1] 王云燕[1] 柴立元[1] 舒余德[1] 王庆伟[1] 陈润华[1] 

机构地区：[1]中南大学冶金科学与工程学院,湖南长沙410083

出　　处：《过程工程学报》2009年第6期1109-1114,共6页The Chinese Journal of Process Engineering

基　　金：国家自然科学基金重点资助项目(编号:50830301);国家科技支撑计划重点资助项目(编号:2007BAC25B01);教育部科学技术研究重大基金资助项目(编号:308019);湖南省自然科学基金资助项目(编号:08JJ3020);湖南省科技计划基金资助项目(编号:2008SK4031);湖南省节能减排科技重大专项基金资助项目(编号:08SK1005&08SK1002)

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100mg/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30min,处理后出水的As浓度低于10μg/L,达到《生活饮用水卫生标准》(GB5749-2006).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 μg/L, which qualifies health standard for domestic drinking water （GB5749-2006）.

关 键 词：含砷废水 热力学平衡 高铁酸钾 氧化-絮凝 

分 类 号：X703.1[环境科学与工程—环境工程]