Lee, Hongkyun Kim, Dohyeong Kim, Jongsik Ji, Min-Kyu Han, Young-Soo Park, Young-Tae Yun, Hyun-Shik Choi, Jaeyoung 2024-01-20T06:33:16Z 2024-01-20T06:33:16Z 2021-09-04 2015-07-15 0304-3894 https://pubs.kist.re.kr/handle/201004/125226 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 q(max) 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. (C) 2015 Elsevier B.V. All rights reserved. English ELSEVIER SCIENCE BV CALCIUM ALGINATE ARSENIC REMOVAL IRON SORPTION PHOSPHORUS BEHAVIOR SAND As(III) and As(V) removal from the aqueous phase via adsorption onto acid mine drainage sludge (AMDS) alginate beads and goethite alginate beads Article 10.1016/j.jhazmat.2015.03.026 1 JOURNAL OF HAZARDOUS MATERIALS, v.292, pp.146 - 154 JOURNAL OF HAZARDOUS MATERIALS 292 146 154 scie scopus 000353740500017 Engineering, Environmental Environmental Sciences Engineering Environmental Sciences & Ecology Article CALCIUM ALGINATE ARSENIC REMOVAL IRON SORPTION PHOSPHORUS BEHAVIOR SAND As Adsorption Acid mine drainage sludge Goethite Alginate bead