聚硅酸硫酸铝铁复配及在钨铋选矿废水中的应用  

Combination of polysilicate-aluminum-ferric-sulfate and application to W and Bi dressing wastewater treatment

作　　者：郭朝晖[1] 袁珊珊[1] 肖细元[1] 刘亚男[1] 姜智超[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：《中南大学学报（自然科学版）》2013年第2期461-468,共8页Journal of Central South University:Science and Technology

基　　金：国家水体污染控制与治理专项课题(2010ZX07212-008)

摘　　要：通过优化聚硅酸硫酸铝铁中铝硅铁比,配制适宜的聚硅酸硫酸铝铁絮凝剂并进行钨铋选矿废水处理,为多金属矿选矿废水稳定达标排放提供技术依据。研究结果表明:在w(SiO2)=2.0%,n(Fe+Al)/n(Si)=2:1,n(Fe)/n(Al)=1:1的适宜配比下制得的聚硅酸硫酸铝铁絮凝剂,在1.5%投加量下,可使钨铋选矿废水浊度去除率达95%以上,处理后废水浊度为70 NTU;COD去除率达70%,处理后废水中COD含量为72 mg/L;As,Be和Pb去除率均达90%以上,处理后废水中As,Be和Pb质量浓度分别为34,0.2和13μg/L,处理后废水达到GB 8978—1996(《污水综合排放标准》)一级标准。Polysilicate-aluminum-ferric-sulfate （PSAFS） optimized was prepared to evaluate the coagulation in wastewater from W＆ Bi dressing and steadily serve the discharge standard for the multi-metals dressing wastewater. The results show that the components of PSAFS optimized are w（SiO2）=2.0%, n（Fe＋Al）/n（Si）=2：1 and n（Fe）/n（Al）=1：1, respectively. Using 1.5% of PASAFS optimized in wastewater from W and Bi dressing, the removal percentages of wastewater turbidity and COD exceed 95% and 70%, and those of As, Be and Pb in wastewater exceed 90%, respectively. The residual concentrations of turbidity and COD are only 70 NTU and 72 mg/L, and those of As, Be and Pb in wastewater are only 34, 0.2 and 13 μg/L, respectively. Wastewater treatment from W and Bi dressing with optimized PASAFS can meet the first level of the National Integrated Wastewater Discharge Standard （GB 8978--1996）.

关 键 词：聚硅酸硫酸铝铁 钨铋矿 选矿废水 浊度 COD 重金属 

分 类 号：X703[环境科学与工程—环境工程]