Abstract
Arsenic (As) removal by nano bimetallic Cu‐Fe synthesized by in‐situ (Cu‐Fe)IS and impregnation (Cu‐Fe)IM techniques was studied. Synthesized Cu‐Fe by both techniques provided smaller particles than NZVI particles. (Cu‐Fe)IM showed higher efficiency in As removal, compared to (Cu‐Fe)IS and pristine NZVI. Batch experiments were performed by varying percent Cu loading (0–30% by wt). As(III) was removed completely by 10 wt % Cu loading on NZVI under an IM technique. It also provided double removal rate compared to pristine NZVI. X‐ray absorption near edge structure analysis supported that a mixed phases of Cu2O and CuO in (Cu‐Fe)IM enhanced As removal toward co‐precipitating with iron species about 20% for both As(III) and As(V) removal. © 2017 American Institute of Chemical Engineers Environ Prog, 36: 1449–1457, 2017
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