Removal of arsenic(III) ion from aqueous media using complex nickel-aluminum and nickel-aluminum-zirconium hydroxides

• Main Authors: Fumihiko Ogata, Noriaki Nagai, Megumu Toda, Masashi Otani, Chalermpong Saenjum, Takehiro Nakamura, Naohito Kawasaki
• Format: Journal
• Published: 2020
• Subjects: Agricultural and Biological Sciences; Biochemistry, Genetics and Molecular Biology; Environmental Science
• Online Access: https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85087476754&origin=inward; http://cmuir.cmu.ac.th/jspui/handle/6653943832/70040
• Institution: Chiang Mai University

© 2020 by the authors. The technology of wastewater treatment involving removal of heavy metals using complex metal hydroxides is reported. In this study, complex nickel-aluminum (NA11 and NA12) and nickel-aluminum-zirconium (NAZ1 and NAZ2) hydroxides were prepared for the removal of arsenite ions, As(III), from aqueous solution. The characteristics of each adsorbent were evaluated, and the adsorption capacity and adsorption mechanism were determined. The adsorption capacity of As(III) on NAZ1 (15.3 mg g-1) was greater than that on NA11 (9.3 mg g-1). Coverage is directly related to the specific surface area with a correlation coefficient of 0.921. Ion exchange involving sulfate ions in the interlayer of the adsorbent also plays a role in the mechanism of As(III) adsorption as demonstrated by correlation coefficients of 0.797 and 0.944 for the NA11 and NAZ1, respectively. The results demonstrate the usefulness of NAZ1 in removing As(III) from aqueous media.