Recovery of cobalt and copper from single- and co-contaminated simulated electroplating wastewater via carbonate and hydroxide precipitation

Abstract Wastewater containing cobalt and copper comprised of plating wash water, plant equipment cooling water is generated in the electroplating industry. These metals can be detrimental to humans, animals, plants, environment. Thus, it necessary treat wastewater remove these toxic metals. Carbonate hydroxide precipitation were utilized for removal Co (II) Cu from synthetic by jar tests this work. The effects solution pH, precipitant-to-metal ratio, type precipitant on efficiency single- co-contaminated systems investigated. achieved higher both target streams. Furthermore, operate at relatively low pH range about 7–8. Cobalt pollutant was almost completely removed 10 using systems. Copper found easily which possibly brought precipitation-adsorption mechanism. extent co-removal with significantly dependent. effect ratio treatment varied led sludge volume than that precipitation.