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Removal of arsenic ( III ) and arsenic (V) from aqueous solutions through adsorption by Fe/Cu nanoparticles
Author(s) -
Babaee Yassaman,
Mulligan Catherine N,
Rahaman Md Saifur
Publication year - 2018
Publication title -
journal of chemical technology and biotechnology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.64
H-Index - 117
eISSN - 1097-4660
pISSN - 0268-2575
DOI - 10.1002/jctb.5320
Subject(s) - arsenic , sorption , aqueous solution , adsorption , chemistry , nanoparticle , desorption , langmuir adsorption model , arsenic contamination of groundwater , inorganic chemistry , nuclear chemistry , arsenate , environmental chemistry , materials science , nanotechnology , organic chemistry
BACKGROUND While various iron‐based nanomaterials have been studied for the removal of arsenic from groundwater or its immobilization in soils, this study focuses on the applicability of iron/copper bimetallic nanoparticles for removal of arsenic from synthetic contaminated waters. In order to determine the effectiveness of these nanoparticles for arsenic removal, after synthesis, various sorption tests were performed with aqueous arsenic solutions. RESULTS Detailed physicochemical characterization of synthesized nanoparticles confirmed the successful formation of Fe/Cu nanoparticles with a mean diameter of 13.17 nm. These nanoparticles were found to be effective for removing arsenic from aqueous solutions. The maximum sorption capacities for As( III ) and As(V) were 19.68 mg g −1 and 21.32 mg g −1 , respectively, at a pH of 7.0. Adsorption isotherms fit well into the Langmuir equation, and sorption follows pseudo‐second‐order kinetics. Coexisting carbonate, sulfate, and phosphate ions had no significant effect on the removal efficiency of arsenic at the concentrations studied. Arsenic removal efficiency by Fe/Cu nanoparticles is enhanced in acidic environments and in basic conditions, desorption of arsenic is possible. CONCLUSION The Fe/Cu nanoparticle powder was found to be effective for removal of arsenic from water and has potential to be used for arsenic remediation from the aquatic environment or in situ immobilization of arsenic. © 2017 Society of Chemical Industry