TREATMENT OF NONFERROUS METALLURGICAL ACIDIC INORGANIC WASTEWATER CONTAINING HEAVY METALS BY REVERSE OSMOSIS MEMBRANE
Based on reverse osmosis membrane separation technology,the treatment of inorganic acidic wastewater containing heavy metals from nonferrous metallurgical flue gas purification system was studied in this article.The effects of pressure,pH,running time and the flow rate ratio of concentrated water to permeated water on the treatment of Cr3+,Pb2+,Cu2+ and Zn2+-contain wastewater were investigated.The experimental results show that,under the condition of optimum process,even the mass concentration of the 4 heavy metal ions is high up to 30 mg/L simultaneously,their removal efficiency can reach a satisfied level,which is 99.8％,97.0％,97.8％ and 97.9％ for Cr3+,Pb2+,Cu2+ and Zn2+ respectively; In the permeated water,except that the concent of Cu2+ is only up to the secondary index according to the GB 8978-1996,the other three kinds of heavy metal ion concent are conformed to the requirements of the GB 8978-1996.
nonferrous metallurgicalheavy metal wastewaterreverse osmosisoperation condition
NETL
NSTL
万方数据
维普
