Journal
BIORESOURCE TECHNOLOGY
Volume 193, Issue -, Pages 243-249Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2015.06.102
Keywords
Arsenic; Chitosan; Granular; Sorption; Groundwater
Funding
- National Natural Science Foundation of China [51478457, 51178453]
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A novel sorbent of Fe-Mn binary oxide impregnated chitosan bead (FMCB) was fabricated through impregnating Fe-Mn binary oxide into chitosan matrix. The FMCB is sphere-like with a diameter of 1.6-1.8 mm, which is effective for both As(V) and As(III) sorption. The maximal sorption capacities are 39.1 and 54.2 mg/g, respectively, outperforming most of reported granular sorbents. The arsenic was mainly removed by adsorbing onto the Fe-Mn oxide component. The coexisting SO42-, HCO3- and SiO32- have no great influence on arsenic sorption, whereas, the HPO42- shows negative effects. The arsenic-loaded FMCB could be effectively regenerated using NaOH solution and repeatedly used. In column tests, about 1500 and 3200 bed volumes of simulated groundwater containing 233 mu g/L As(V) and As(III) were respectively treated before breakthrough. These results demonstrate the superiority of the FMCB in removing As(V) and As(III), indicating that it is a promising candidate for arsenic removal from real drinking water. (C) 2015 Elsevier Ltd. All rights reserved.
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