Treatment of mine drainage generated by lead-zinc concentration plant
来源期刊：中南大学学报(英文版)2014年第4期
论文作者：ZENG Ke(曾科) 覃文庆 焦芬 HE Ming-fei(何名飞) KONG Ling-qiang(孔令强)
文章页码：1453 - 1460
Key words：heavy metal removal; mine drainage; coagulation-flocculation; corrosive electrochemistry
Abstract: The purification efficiency in the treatment of the mine drainage generated by the mineral processing industry in Mengzi, Yunnan Project, China, was investigated, and the influences of the treated drainage on the mineral electrodes’ electrochemical behaviors were tested. Experiments with different doses of polyacrylamide (PAM) and polymeric ferric sulfate (PFS) at different pH values were carried out, and the advanced purification by activated carbon (AC) was conducted. Compared with PFS, the better coagulant for removal efficiency is PAM, under the optimal conditions, the removals of Pb2+, Zn2+, Cu2+ and COD reduction from solution were 94.8%, 79.9%, 87.6% and 85%, respectively. In the advanced purification, the particle size of activated carbon and agitation time played important roles in the removal efficiency. Each pollute concentration could meet the emission standard of pollutants for lead and zinc industry (GB25466—2010). The wastewater without treatment affected galena and sphalerite electrochemical behaviors greatly, after treatment by the technology, the effects disappeared, which proved the reliability of the technology for wastewater treatment.
ZENG Ke(曾科), QIN Wen-qing(覃文庆), JIAO Fen(焦芬), HE Ming-fei(何名飞), KONG Ling-qiang(孔令强)
(School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China)
Abstract:The purification efficiency in the treatment of the mine drainage generated by the mineral processing industry in Mengzi, Yunnan Project, China, was investigated, and the influences of the treated drainage on the mineral electrodes’ electrochemical behaviors were tested. Experiments with different doses of polyacrylamide (PAM) and polymeric ferric sulfate (PFS) at different pH values were carried out, and the advanced purification by activated carbon (AC) was conducted. Compared with PFS, the better coagulant for removal efficiency is PAM, under the optimal conditions, the removals of Pb2+, Zn2+, Cu2+ and COD reduction from solution were 94.8%, 79.9%, 87.6% and 85%, respectively. In the advanced purification, the particle size of activated carbon and agitation time played important roles in the removal efficiency. Each pollute concentration could meet the emission standard of pollutants for lead and zinc industry (GB25466—2010). The wastewater without treatment affected galena and sphalerite electrochemical behaviors greatly, after treatment by the technology, the effects disappeared, which proved the reliability of the technology for wastewater treatment.
Key words:heavy metal removal; mine drainage; coagulation-flocculation; corrosive electrochemistry
