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）.
出处
《中南大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
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)
关键词
聚硅酸硫酸铝铁
钨铋矿
选矿废水
浊度
COD
重金属
polysilicate-aluminum-ferric-sulfate
bismuth-containing tungsten ore
dressing wastewater
turbidity
COD
heavy metal
作者简介
通信作者：郭朝晖（1971-），男，湖南宁乡人，博士，教授，从事矿冶环境生态修复技术、环境污染控制化学研究；电话：0731-88836442：E-mail：zhguo@csu．edu．cn
