Separation and recovery of heavy metals from waste water using synergistic solvent extraction

1st International Conference on New Material and Chemical Industry

材料科学;化学工业

Li, Yan^1 ; Yang, Limei^1 ; Xu, Zheng^1 ; Sun, Qi^1

National Engineering Laboratory of Biohydrometallurgy, General Research Institute for Non-Ferrous Metals (GRINM), China^1

关键词: Calcium and magnesiums;    Extraction rate;    Organic systems;    Smelting process;    Synergistic solvent extraction;    Versatic 10;    Wastewater pollution;    Zinc hydrometallurgy;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/167/1/012005/pdf
DOI  :  10.1088/1757-899X/167/1/012005

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

Heavy metal wastewater pollution is one of the three major water pollutions in the world. The zinc hydrometallurgy smelting process usually discharge large quantities of heavy metal wastewater into the environment. In this paper, a synergistic solvent extraction process has been developed to recover copper, nickel, zinc and cadmium respectively from calcium and magnesium. The synergistic organic system contained 0.50 M Versatic 10 and 0.5 M Mextral 984H in DT100. Adjusting pH to 2.0 at 40 °C, the copper will be extracted preferentially with the extraction rate more than 99%. Continuing to adjust pH to 4.2 at 40 °C, the nickel will be extracted secondly with an extraction rate more than 98%; the zinc and cadmium in raffinate could be extracted separately while pH is about 6.5.