Bioleaching of metals from electronic scrap by moderately thermophilic acidophilic bacteria

Bio-Reclamation of Strategic and Energy Critical Metals from Secondary Resources

“…Moderately thermophilic iron and sulfur-oxidizing microbes were primarily cultured from the mining conditions or hot springs [18,19] and subsequently from the mine-sites of iron ore [20]. Advancement in moderate thermophiles such as Sulfobacillus thermosulfidooxidans continues in recent mining operations, including refractory gold heaps undergoing biooxidation [21] and in bio-reclamation of electronic wastes [20,22]. Nowadays extremely thermophilic microorganisms in acidic, sulfidic hot springs have been used for their exceptional ability to oxidize the hard-to-treat materials.…”

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.…”

Copper leaching from waste electric cables by biohydrometallurgy

“…Bioleaching technology was only investigated recently to process polymetallic wastes such as printed circuit boards (PCB) (Wang and et al, 2009;Yang et al, 2009;Liang et al, 2010;Xiang et al, 2010), electronic scraps (Brandl et al, 2001;Ilyas et al, 2007) shredder residues (Lewis et al, 2011). For this purpose, chemolithotrophic bacteria from the specie Acidithiobacillus ferrooxidans were mostly studied as a mean to regenerate ferric from ferrous iron.…”