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- W3036695007 abstract "In this paper, we report leaching of precious and scattered metals such as gold (Au), copper (Cu), nickel (Ni), zinc (Zn), iron (Fe), and lead (Pb) from printed circuit boards of scrap mobile phones by hydrometallurgical process using inorganic acid, organic acid and base. The amount of metals leached by different leachants are quantified using atomic absorption spectroscopy. Among various inorganic acids, aqua regia (mixture of nitric acid (HNO 3 ) and hydrochloric acid) is found to be the strongest leachant for most of the metals such as Zn (2.04 wt %), Fe (17.90 wt %), Ni (0.66 wt %), Pb (5.86 wt %) and Au (0.04 wt %). The basic leachant, ammonium thiosulphate is found to be very effective in leaching of Au (0.03125 wt %). The dissolution of Cu in HNO 3 gives the highest amount of Cu in the solvent, that is, ∼ 7.52 wt %. The metallic phases present in the electronic waste before and after leaching are identified by X-ray diffraction analysis. The microscopic structure has been studied using a scanning electron microscope which depicts erosion of the structure after leaching." @default.
- W3036695007 created "2020-06-25" @default.
- W3036695007 creator A5058893547 @default.
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- W3036695007 date "2020-06-22" @default.
- W3036695007 modified "2023-10-16" @default.
- W3036695007 title "Studies on leaching characteristics of electronic waste for metal recovery using inorganic and organic acids and base" @default.
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- W3036695007 doi "https://doi.org/10.1177/0734242x20931929" @default.
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