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  • Volume 17, Issue 3

Arsenic adsorption using Fe(III)-loaded porous amidoximated acrylonitrile/itaconic copolymers

Chunnuan Ji, Suwen Sun, Shenghua Chi, Rongjun Qu, Changmei Sun, Peng Yin
Published May 2017, 17 (3) 698-706; DOI: 10.2166/ws.2016.148
Chunnuan Ji
School of Chemistry & Materials Science, Ludong University, Yantai 264025, China E-mail: jichunnuan@126.com
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Suwen Sun
School of Chemistry & Materials Science, Ludong University, Yantai 264025, China E-mail: jichunnuan@126.com
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Shenghua Chi
School of Chemistry & Materials Science, Ludong University, Yantai 264025, China E-mail: jichunnuan@126.com
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Rongjun Qu
School of Chemistry & Materials Science, Ludong University, Yantai 264025, China E-mail: jichunnuan@126.com
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Changmei Sun
School of Chemistry & Materials Science, Ludong University, Yantai 264025, China E-mail: jichunnuan@126.com
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Peng Yin
School of Chemistry & Materials Science, Ludong University, Yantai 264025, China E-mail: jichunnuan@126.com
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Abstract

A highly selective polymeric ligand exchanger was developed for the removal of trace As(V) from aqueous solution. This adsorbent was prepared by loading Fe(III) onto porous amidoximated polyacrynitrile (AN)/itaconic acid (IA) copolymers (Fe(III)-AO AN/IA). Negligible ferric ion dissolution was observed from Fe(III)-AO AN/IA in solution of acidic pHs up to 2. As(V) adsorption by Fe(III)-AO AN/IA is a pH-dependent process with maximum capacity of 1.32 mg/g at pH 2–3. The adsorption process was found to be governed by pseudo-second-order kinetics, and could be described by the Freundlich model. Fe(III)-AO AN/IA had higher adsorption selectivity for As(V) than other anions in a simulated groundwater body such as Cl−, SO42−, PO43−, SiO32−. Fixed-bed adsorption indicated that As(V) in simulated groundwater could be effectively captured from 400 μg/L to <10 μg/L within 190 bed volumes (BV). The As(V) adsorbed on Fe(III)-AO AN/IA could be efficiently eluted with 10 BV of 5% NaCl solution (at pH = 9.0).

  • adsorption
  • amidoximated acrylonitrile/itaconic copolymers
  • arsenic
  • iron ions
  • polymeric ligand exchanger
  • First received 27 April 2016.
  • Accepted in revised form 31 August 2016.
  • © IWA Publishing 2017
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Water Science and Technology: Water Supply: 18 (2)
  Volume 17, Issue 3

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Arsenic adsorption using Fe(III)-loaded porous amidoximated acrylonitrile/itaconic copolymers
Chunnuan Ji, Suwen Sun, Shenghua Chi, Rongjun Qu, Changmei Sun, Peng Yin
Water Science and Technology: Water Supply May 2017, 17 (3) 698-706; DOI: 10.2166/ws.2016.148
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Arsenic adsorption using Fe(III)-loaded porous amidoximated acrylonitrile/itaconic copolymers
Chunnuan Ji, Suwen Sun, Shenghua Chi, Rongjun Qu, Changmei Sun, Peng Yin
Water Science and Technology: Water Supply May 2017, 17 (3) 698-706; DOI: 10.2166/ws.2016.148

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Keywords

adsorption
amidoximated acrylonitrile/itaconic copolymers
arsenic
iron ions
polymeric ligand exchanger
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