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- W2002203777 abstract "We report a novel nanocrystals (NCs) sorbent, which shows an extraordinary adsorption capacity to aqueous Hg2+ based on cation exchange and allows for the utmost removal of mercury from water. The NCs sorbent was synthesized by direct coating ZnS NCs on the surface of the α-Al2O3 nanoparticles. The as-prepared ZnS NCs sorbent can efficiently remove over 99.9% Hg2+ in 1 min, and lower the Hg2+ concentration from 297.5 mg/L (ppm) to below 1.0 μg/L (ppb) within 5 min. The saturated adsorption capacity of ZnS NCs for Hg2+ is about 2000 mg/g, which is close to the theoretic saturated adsorption capacity. The mechanism of Hg2+ removal by ZnS NCs sorbent, the influences of pH value and other cations on Hg2+ removal were investigated, respectively. Meanwhile, it is found the size-dependent cation exchange plays a critical role in the removal of Hg2+ by ZnS NCs. Small size ZnS NCs shows better performance than the big size ZnS NCs in the adsorption capacity and adsorption rate for Hg2+. Furthermore, the mercury adsorbed by the ZnS NCs sorbent is readily recycled by extraction with aqueous sodium sulfide." @default.
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- W2002203777 date "2014-10-09" @default.
- W2002203777 modified "2023-10-16" @default.
- W2002203777 title "Ultraeffective ZnS Nanocrystals Sorbent for Mercury(II) Removal Based on Size-Dependent Cation Exchange" @default.
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- W2002203777 doi "https://doi.org/10.1021/am504896w" @default.
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