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- W3111874516 abstract "This study systematically investigated the acid washing of incineration bottom ash (IBA) of municipal solid waste, focusing on the removal and leaching of heavy metals (Pb, Zn, Cr, Cd, Cu, and Ni), as well as their pH-dependent behavior. A series of small-scale laboratory acid washing tests with different nitric acid concentrations and washing periods were conducted. The concentrations of metals in the washing water were measured to evaluate the metal removal efficiency. Then, one stage batch leaching test was conducted for washed IBA to evaluate the leaching reduction efficiency of washing. The results showed that the maximum metal removal efficiencies for Zn, Cu, and Ni (62–76%) were higher than those for Pb, Cr, and Cd (17–25%), which were reached at the highest acid addition for most of the metals. Increasing the washing period did not always increase the metal removal efficiency. The maximum leaching reduction efficiencies were higher for Zn, Cr, and Cu (93–98%) than those for Pb, Ni, and Cd (73–79%). Both washing and leaching processes showed a similar metal concentration-pH profile for each metal. For Pb, Zn, Cr, and Cd, the metal concentration-pH profile generally followed the metal hydroxide solubility versus pH curves. For Cu and Ni, the concentration of metal decreased with the increasing pH first and then kept at a stable concentration higher than the solubility of the hydroxide, indicating that Cu and Ni in the IBA washing water and leachates did not exist dominantly as their hydroxides." @default.
- W3111874516 created "2020-12-21" @default.
- W3111874516 creator A5036325408 @default.
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- W3111874516 date "2021-02-01" @default.
- W3111874516 modified "2023-10-03" @default.
- W3111874516 title "Acid washing of incineration bottom ash of municipal solid waste: Effects of pH on removal and leaching of heavy metals" @default.
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- W3111874516 doi "https://doi.org/10.1016/j.wasman.2020.11.030" @default.
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- W3111874516 hasPublicationYear "2021" @default.
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