Chemical and biological extraction of metals present in E waste: A hybrid technology

Size-controlled preparation of Cu2O nanoparticles from waste printed circuit boards by supercritical water combined with electrokinetic process

“…Many recycling techniques of copper from waste PCBs have been developed such as pyrometallurgy [6], hydrometallurgy [7][8][9], bioleaching [10,11] and mechanical process [4]. Recently, to obtain high purity products of copper from waste PCBs, many new processes were proposed such as leaching-electrowinning [12,13], mechanical separation-electrometallurgy [14], and vacuum metallurgy [15].…”

“…However, all of the above-mentioned processes can only recover metallic copper [4][5][6][7][8][9][10][11][12][13][14][15][16][17]. In our previous study [18], Cu 2 O/TiO 2 nanomaterials were prepared from waste PCBs by EK process.…”

Co-treatment of waste printed circuit boards and polyvinyl chloride by subcritical water oxidation: Removal of brominated flame retardants and recovery of Cu and Pb

“…In addition, many researchers have used various mechanical methods as pre-treatment to separate metals from waste PCBs [2,5]. Other recycling techniques for metals in waste PCBs such as bioleaching [12,13] and vacuum metallurgy technology [14] also have been developed. However, the foregoing processes not only can not remove efficiently toxic organic matters such as BFRs in waste PCBs, but also have a considerable loss of valuable metal due to the insufficient liberation [15,16].…”

Kinetics of tetrabromobisphenol A (TBBPA) reactions with H2SO4, HNO3 and HCl: Implication for hydrometallurgy of electronic wastes

“…Acid leaching is often used for the extraction of precious metals with inorganic acids (e.g. H 2 SO 4 , HNO 3 , and HCl) as the reagents [8,5]. Nnorom and Osibanjo [9] have shown that a mixture of H 2 SO 4 and HNO 3 was efficient for the recovery of Ag from waste mobile phones.…”