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Arsenic adsorption by iron-aluminium hydroxide coated onto macroporous supports : Insights from x-ray absorption spectroscopy and comparison with granular ferric hydroxides

Suresh Kumar, P. LU ; Quiroga Flores, R. LU ; Önnby, L. LU and Sjöstedt, C. (2016) 6th International Congress on Arsenic in the Environment, AS 2016 In Arsenic Research and Global Sustainability - Proceedings of the 6th International Congress on Arsenic in the Environment, AS 2016 p.478-479
Abstract

The arsenic adsorption characteristics of a macroporous polymer coated with coprecipi-tated iron-aluminium hydroxides (MHCMP) is evaluated in this study. The MHCMP had a maximum adsorption capacity of 82.3 and 49.6 mg As/g adsorbent for As(III) and As(V) ions respectively. Extended X-ray Absorption Fine Structure (EXAFS) confirmed that binding of As(III) ions took place on the iron hydroxides coated on the MHCMP, whereas for As(V) ions the binding specificity could not be attributed to one particular metal hydroxide. Column experiments were run in a well water spiked with 100 μg/L concentration of As(III) and for comparison a commercially available adsorbent (GEH®102) based on granular iron-hydroxide was used. The MHCMP was able to... (More)

The arsenic adsorption characteristics of a macroporous polymer coated with coprecipi-tated iron-aluminium hydroxides (MHCMP) is evaluated in this study. The MHCMP had a maximum adsorption capacity of 82.3 and 49.6 mg As/g adsorbent for As(III) and As(V) ions respectively. Extended X-ray Absorption Fine Structure (EXAFS) confirmed that binding of As(III) ions took place on the iron hydroxides coated on the MHCMP, whereas for As(V) ions the binding specificity could not be attributed to one particular metal hydroxide. Column experiments were run in a well water spiked with 100 μg/L concentration of As(III) and for comparison a commercially available adsorbent (GEH®102) based on granular iron-hydroxide was used. The MHCMP was able to treat seven times more volume of well water as compared to GEH®102, maintaining the threshold concentration of less than 10 μg As/L, indicating that the MHCMP is a superior adsorbent.

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publication status
published
subject
in
Arsenic Research and Global Sustainability - Proceedings of the 6th International Congress on Arsenic in the Environment, AS 2016
pages
2 pages
publisher
CRC Press/Balkema
conference name
6th International Congress on Arsenic in the Environment, AS 2016
external identifiers
  • scopus:85016999965
ISBN
9781138029415
language
English
LU publication?
yes
id
007a37d8-0423-40c2-971f-f0b6ab827511
date added to LUP
2017-05-11 14:11:00
date last changed
2017-08-09 14:36:45
@inproceedings{007a37d8-0423-40c2-971f-f0b6ab827511,
  abstract     = {<p>The arsenic adsorption characteristics of a macroporous polymer coated with coprecipi-tated iron-aluminium hydroxides (MHCMP) is evaluated in this study. The MHCMP had a maximum adsorption capacity of 82.3 and 49.6 mg As/g adsorbent for As(III) and As(V) ions respectively. Extended X-ray Absorption Fine Structure (EXAFS) confirmed that binding of As(III) ions took place on the iron hydroxides coated on the MHCMP, whereas for As(V) ions the binding specificity could not be attributed to one particular metal hydroxide. Column experiments were run in a well water spiked with 100 μg/L concentration of As(III) and for comparison a commercially available adsorbent (GEH®102) based on granular iron-hydroxide was used. The MHCMP was able to treat seven times more volume of well water as compared to GEH®102, maintaining the threshold concentration of less than 10 μg As/L, indicating that the MHCMP is a superior adsorbent.</p>},
  author       = {Suresh Kumar, P. and Quiroga Flores, R. and Önnby, L. and Sjöstedt, C.},
  booktitle    = {Arsenic Research and Global Sustainability - Proceedings of the 6th International Congress on Arsenic in the Environment, AS 2016},
  isbn         = {9781138029415},
  language     = {eng},
  pages        = {478--479},
  publisher    = {CRC Press/Balkema},
  title        = {Arsenic adsorption by iron-aluminium hydroxide coated onto macroporous supports : Insights from x-ray absorption spectroscopy and comparison with granular ferric hydroxides},
  year         = {2016},
}