·The high concentration ratio of the sulfate to lead ions Table S1 renders the effective removal of both pollutants a challenging common technique applied for the treatment of such effluents is the Walhalla process which is based on ettringite precipitation Schuster et al 1996 For industrial wastewater at a small flow Walhalla is widely used for
·Removal efficiencies of % for As approximately 100% for Cd and % for Zn were achieved with the new process which met the requirements of the 6 N Pd standard product Impurities As Cd and Zn were concentrated in
·Furthermore lead and zinc were precipitated as sulfides from the alkali leachate The proposed process was a good technique for separation of arsenic and enrichment of valuable metals for further centralized treatment separately It provided high separation efficiency of arsenic and valuable metals as well as low environmental pollution
Distillation is a purification process where the components of a liquid mixture are vaporized and then condensed and isolated In simple distillation a mixture is heated and the most volatile component vaporizes at the lowest temperature The vapor passes through a cooled tube a condenser where it condenses back into its liquid state
·Aim to solve the problem of lead and antimony separation various process have been proposed in China which could be divided into pyrometallurgical process and hydrometallurgical process Pyrometallurigical process including reducing matte smelting process [16] and water vapor air oxidization process [17] However both process doesn t solve
·The separation of lead Pb and mercury Hg from copper Cu smelting acid sludge using the carbonization and acid leaching total hydrometallurgical process was investigated The effects of the excess coefficient of sodium carbonate excess coefficient of nitric acid conversion time conversion temperature dissolution time and dissolution temperature
·Considering the highly toxic potential of Pb II [1] and also the interest in its recovery for further industrial reuse studies involving lead separation in order to obtain non toxic diluate and concentrate solution with high lead content and being also performed under conditions approaching those used in the pilot/industrial units can be of
·The flue dust generated during the processing of e waste is valuable as a secondary metal resource In this study a process of selective metal recovery from flue dust through the magnetic separation and the leaching process were developed All the experiments were carried out at atmospheric pressure below 60°C
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