Copper recovery and gold enrichment from waste printed circuit boards by mediated electrochemical oxidation

A novel reutilization method for waste printed circuit boards as flame retardant and smoke suppressant for poly (vinyl chloride)

“…As the fundamental part in most WEEE, waste printed circuit boards (PCBs) consisted of metals and nonmetal portions such as copper, tin, lead, gold, silver, and brominated resin [2][3][4][5]. In general, waste PCBs can be regarded as resources from the economic perspectives.…”

An advanced study on the hydrometallurgical processing of waste computer printed circuit boards to extract their valuable content of metals

“…capacitors, resistor, batteries), comminuting, in some cases a thermal treatment, chemical leaching, solution purification and metals recovery. Reagents like the inorganic acids (sulfuric acid, hydrochloric acid and nitric acid), organic acids (citric acid, oxalic acid) or solution with alkaline character (ammonium and sodium hydroxide) have been used for base metals leaching, afterwards a subsequent leaching on the solid suspension has been applied with chemicals such as cyanide, thiosulfate, thiourea and halides for the precious metals recovery (Birloaga et al, 2013;Jianfeng et al, 2009;Kim et al, 2011;Lee et al, 2011;Oishi et al, 2007;Kamberović et al, 2011;Zhou and Qiu, 2010;Zhu et al, 2011;Fogarasi et al, 2013;Fogarasi et al, 2014;Yang et al, 2011a,b). Many hydrometallurgical attempts were tried to extract copper from the composition of WPCBs, this ''red gold'' being considerate the major metallic element in the composition of these wastes.…”

Micro-copper powders recovered from waste printed circuit boards by electrolysis

“…It can be seen from Table 3 that the purity of copper is higher than 98.06%. It can also be seen that it contains Sn, 1.03%, because of the secondary reactions at cathode (Fogarasi et al, 2014).…”