含砷废水制备亚砷酸铜的工艺研究  

Study on the process of preparing copper arsenite from arsenic-containing wastewater

作　　者：陈辉[1] 陈芳芳[2] CHEN Hui;CHEN Fang-fang(Jiangxi University of Science and Technology 330098,China;Modern Education Center,Jiangxi University of Science and Technology,Nanchang 330098,China)

机构地区：[1]江西科技学院,江西南昌330098 [2]江西科技学院现代教育中心,江西南昌330098

出　　处：《中国有色冶金》2023年第3期81-85,共5页China Nonferrous Metallurgy

基　　金：江西省教育厅科学技术研究项目(GJJ202006);江西省教育厅科学技术研究项目(GJJ2022601);江西省科技厅科技合作领域项目(20192BBHL80006)。

摘　　要：有色冶炼企业产生大量含砷废水,砷对人体内酶蛋白的巯基具有特殊亲和力,特别是与丙酮酸氧化酶的巯基容易结合为复合物,影响细胞正常新陈代谢,导致细胞死亡,损害神经细胞,导致多发性周围神经炎,并造成肝脏、心脏器官的损害。而含砷废水的处理产物亚砷酸铜可用作农业杀虫剂、除草剂、抗真菌剂和灭鼠剂,在子弹诱饵中可作为毒药使用,也可用于制备三氧化二砷的原料。本文采用硫酸铜沉淀法进行废水脱砷,考察了硫酸铜用量、反应温度、反应时间、搅拌速度和溶液pH值等对含砷废水脱砷效果的影响。结果表明:硫酸铜用量为n(Cu)/n(As)=2.0,搅拌速度50 r/min,在20℃下反应2.0 h,调节溶液pH为8.0,亚砷酸铜的产率为97.23%,且生产实践同样证明了采用硫酸铜沉淀法处理含砷废水是可行的。通过本文工艺实现了有价资源无害化利用,为有色冶炼企业含砷废水处理提供重要数据支撑。Non-ferrous smelting enterprises produce a large amount of arsenic-containing wastewater.Arsenic has a special affinity for the sulfhydryl group of enzyme proteins in the human body,especially with the sulfhydryl group of pyruvate oxidase.Multiple peripheral neuritis,and cause damage to the liver and heart organs.Copper arsenite can be used as agricultural pesticides,herbicides,antifungals and rodenticides,and can be used as poisons in bullet baits;in addition,copper arsenite can be used as a raw material for the preparation of arsenic trioxide.The copper sulfate precipitation method was used to remove arsenic from wastewater,and the effects of copper sulfate dosage,reaction temperature,reaction time,stirring speed and solution pH on the removal of arsenic from arsenic-containing wastewater were investigated.The results show that the dosage of copper sulfate is n(Cu)/n(As)=2.0,the stirring speed is 50 r/min,the reaction is carried out at 20℃for 2.0 h,the pH of the solution is adjusted to 8,and the yield of copper arsenite is 97.23%,to provide important data support for the treatment of arsenic-containing wastewater in non-ferrous smelting enterprises.

关 键 词：含砷废水 亚砷酸铜 硫酸铜 沉淀法 脱砷 废水处理 资源化利用 

分 类 号：X758[环境科学与工程—环境工程] TQ131.21[化学工程—无机化工]