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- W2093000635 abstract "Acid mine drainage sludge (AMDS) is a solid waste generated following the neutralization of acid mine drainage (AMD). This material entrapped in calcium alginate was investigated for the sorption of As(III) and As(V). Three different adsorbent materials were prepared: AMDS alginate beads (AABs), goethite alginate beads (GABs), and pure alginate beads. The effects of pH and the adsorption kinetics were investigated, and the adsorption isotherms were also evaluated. The optimum pH range using the AABs was determined to be within 2–10 for As(III) and 2–9 for As(V). Adsorption equilibrium data were evaluated using the Langmuir isotherm model, and the maximum adsorption capacity qmax was 18.25 and 4.97 mg g−1 for As(III) on AAB and GAB, respectively, and 21.79 and 10.92 mg g−1 for As(V) on AAB and GAB, respectively. The adsorption of As(III) and As(V) was observed to follow pseudo-second order kinetics. The As K-edge X-ray absorption near-edge structure (XANES) revealed that the adsorbed As(III) on the AABs was oxidized to As(V) via manganese oxide in the AMDS." @default.
- W2093000635 created "2016-06-24" @default.
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- W2093000635 date "2015-07-01" @default.
- W2093000635 modified "2023-09-22" @default.
- W2093000635 title "As(III) and As(V) removal from the aqueous phase via adsorption onto acid mine drainage sludge (AMDS) alginate beads and goethite alginate beads" @default.
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- W2093000635 doi "https://doi.org/10.1016/j.jhazmat.2015.03.026" @default.
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