An, Byungryul Kim, Hakchan Park, Chanhyuk Lee, Sang-Hyup Choi, Jae-Woo 2024-01-20T07:03:54Z 2024-01-20T07:03:54Z 2021-09-05 2015-05 0304-3894 https://pubs.kist.re.kr/handle/201004/125499 For the selective removal of arsenate (As(V)) a hybrid sorbent was prepared using a non-toxic natural organic material, chitosan, by loading a transition metal, nickel. The immobilization of nickel was achieved by coordination with a deprotonated amino group (NH2) in the chitosan polymer chain. The amount of nickel was directly correlated to the presence of the amino group and was calculated to be 62 mg/g. FTIR spectra showed a peak shift from 1656 to 1637 cm(-1) after Ni2+ loading, indicating the complexation between the amino group and nickel, and a peak of As(V) was observed at 834 cm(-1). An increase of sulfate concentration from 100 mg/L to 200 mg/L did not significantly affect As(V) sorption, and an increase in the concentration of bicarbonate reduced the As(V) uptake by 33%. The optimal pH of the solution was determined at pH 10, which is in accordance with the fraction of HAsO42- and AsO4-3. According to a fixed column test, a break through behavior of As(V) revealed that selectivity for As(V) was over sulfate. Regeneration using 5% NaCI extended the use of sorbent to up to uses without big loss of sorption capacity. (C) 2015 Elsevier B.V. All rights reserved. English ELSEVIER SCIENCE BV Preparation and characterization of an organic/inorganic hybrid sorbent (PLE) to enhance selectivity for As(V) Article 10.1016/j.jhazmat.2015.02.029 1 JOURNAL OF HAZARDOUS MATERIALS, v.289, pp.54 - 62 JOURNAL OF HAZARDOUS MATERIALS 289 54 62 N scie scopus 000353079300007 2-s2.0-84923025618 Engineering, Environmental Environmental Sciences Engineering Environmental Sciences & Ecology Article POLYMERIC LIGAND EXCHANGER FIXED-BED COLUMN CHELATING RESIN DRINKING-WATER CHITOSAN BEADS METAL-IONS ADSORPTION REMOVAL SORPTION BATCH Polymeric ligand exchagner Arsenate Selectivity Chitosan