Arsenic removal from aqueous solutions by adsorption onto hydrous iron oxide-impregnated alginate beads

Abinashi Sigdel; Jeongwon Park; Hyoeun Kwak; Pyung Kyu Park

doi:10.1016/j.jiec.2016.01.005

Arsenic removal from aqueous solutions by adsorption onto hydrous iron oxide-impregnated alginate beads

Abinashi Sigdel, Jeongwon Park, Hyoeun Kwak, Pyung Kyu Park

Division of Environmental Engineering

Research output: Contribution to journal › Article › peer-review

95 Citations (Scopus)

Abstract

Hydrous iron oxide impregnated alginate beads were developed for effective arsenic removal from water. As(III) adsorption was maximized at neutral pH while As(V) adsorption was higher in acidic conditions. Adsorption efficiency for both As(III) and As(V) mostly increased with increasing iron loading, but As(V) adsorption slightly decreased at high iron loading. Phosphate showed a pronounced interfering effect, especially at high concentration. Kinetics data fitted to pseudo-second-order and intra-particle diffusion model suggested chemisorption and intra-particle diffusion might mainly govern As(III) and As(V) adsorption, respectively. Beads were regenerated using NaOH solution and successfully reused for multiple cycles.

Original language	English
Pages (from-to)	277-286
Number of pages	10
Journal	Journal of Industrial and Engineering Chemistry
Volume	35
DOIs	https://doi.org/10.1016/j.jiec.2016.01.005
Publication status	Published - 2016 Mar 25

Bibliographical note

Publisher Copyright:
© 2016 The Korean Society of Industrial and Engineering Chemistry.

All Science Journal Classification (ASJC) codes

Chemical Engineering(all)

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abstract = "Hydrous iron oxide impregnated alginate beads were developed for effective arsenic removal from water. As(III) adsorption was maximized at neutral pH while As(V) adsorption was higher in acidic conditions. Adsorption efficiency for both As(III) and As(V) mostly increased with increasing iron loading, but As(V) adsorption slightly decreased at high iron loading. Phosphate showed a pronounced interfering effect, especially at high concentration. Kinetics data fitted to pseudo-second-order and intra-particle diffusion model suggested chemisorption and intra-particle diffusion might mainly govern As(III) and As(V) adsorption, respectively. Beads were regenerated using NaOH solution and successfully reused for multiple cycles.",

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AU - Sigdel, Abinashi

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AB - Hydrous iron oxide impregnated alginate beads were developed for effective arsenic removal from water. As(III) adsorption was maximized at neutral pH while As(V) adsorption was higher in acidic conditions. Adsorption efficiency for both As(III) and As(V) mostly increased with increasing iron loading, but As(V) adsorption slightly decreased at high iron loading. Phosphate showed a pronounced interfering effect, especially at high concentration. Kinetics data fitted to pseudo-second-order and intra-particle diffusion model suggested chemisorption and intra-particle diffusion might mainly govern As(III) and As(V) adsorption, respectively. Beads were regenerated using NaOH solution and successfully reused for multiple cycles.

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Arsenic removal from aqueous solutions by adsorption onto hydrous iron oxide-impregnated alginate beads

Abstract

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