连续沉淀法处理酸性含砷废水  

Treatment of Arsenic Acidic Wastewater by Multi-stage Precipitation

作　　者：张帆 龙晓波[1] 邱邻霖[1] 刘云梅 ZHANG Fan;LONG Xiaobo;QIU Linlin;LIU Yunmei(Faculty of Metallurgy ＆ Materials Engineering,Kunming Metallurgy College,Kunming 650033,China;Kunming Key Laboratory of Scattered and Precious Metal Comprehensive Utilization,Kunming 650093,China)

机构地区：[1]昆明冶金高等专科学校冶金材料学院,云南昆明650033 [2]昆明市稀散及贵金属资源综合利用重点实验室,云南昆明650093

出　　处：《昆明冶金高等专科学校学报》2018年第3期92-97,共6页Journal of Kunming Metallurgy College

摘　　要：针对当前酸性含砷废水处理工艺存在的问题,提出了一种"预氧化处理—石灰中和—砷、铁共沉淀—置换沉铜—水解净化"处理酸性含砷废水的方法。该方法不仅实现了酸性含砷废水中砷的固化,而且回收了废水中的有价金属铜。采用该方法处理砷、酸、铜的质量浓度分别为8.56 g/L、1.76 g/L、0.35 g/L的酸性含砷废水,砷、酸的去除率高于99%,铜的回收率高于96%,处理后的溶液中As的质量浓度低于0.5 mg/L。In view of the current acid arsenic-containing wastewater treatment process,a new method for the treatment of arsenic acid wastewater is presented. The investigation consists of pre-oxidation,neutralization,co-precipitation,copper cementation,neutralization and hydroxide. The arsenic acid wastewater containing 8. 56 g/L arsenic,1. 76 g/L hydrion,0. 35 g/L copper was treated by this method. The removal of arsenic and hydrion were more than 99%. The recovery of copper was more than 96%. The concentration of arsenic was under 0. 5 mg/L in the wastewater after the treatment.

关 键 词：酸性含砷废水 臭葱石 砷 铜 沉淀 

分 类 号：TF1[冶金工程—冶金物理化学] X703[环境科学与工程—环境工程]