Arsenic removal by iron oxide coated sponge: experimental performance and mathematical models

Journal of Hazardous Materials
Tien Vinh NguyenJaya Kandasamy

Abstract

Millions of people worldwide are at risk from the presence of arsenic in groundwater. In this study, adsorption equilibrium and long term experiments were carried out to evaluate the performance of iron oxide coated sponge (IOCSp) in arsenic removal. It was found that maximum adsorption capacity of IOCSp for As(III) and As(V) calculated by Sips isotherm was 4.2 and 4.6 mg/g of IOCSp, respectively. A filter packed with small amount of 25 g IOCSp maintained a consistent arsenic removal efficiency of 95% from synthetic solution containing arsenic concentration of as high as 1000 microg/L. This produced a throughput volume of 153 and 178 L of water containing As(III) and As(V), respectively before any need for regeneration or disposal of IOCSp. IOCSp could be regenerated by washing it with NaOH solution. The dynamic (column) adsorption kinetics were successfully predicted by the Thomas and Nikolaidis modified models.

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Citations

Feb 5, 2013·Journal of Environmental Management·M J Jiménez-CedilloA Colin-Cruz
Nov 9, 2011·Journal of Hazardous Materials·Wei LiWei-Guo Song
Apr 29, 2014·International Journal of Environmental Analytical Chemistry·Min WuMiklas Scholz
May 8, 2018·Environmental Science and Pollution Research International·Rajesh Manoharrao DhobleSadhana Rayalu
Dec 15, 2020·Journal of Environmental Health Science & Engineering·Daniel SchwantesAndressa Giombelli Rosenberger
Apr 4, 2021·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Zhe JiangTao Jin

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