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An investigation into arsenic(V) removal from aqueous solutions by hydroxylapatite and bone-char

Published online by Cambridge University Press:  05 July 2018

I. R. Sneddon ,
H. Garelick  and
E. Valsami-Jones
I. R. Sneddon
Affiliation:
School of Health and Social Sciences, Middlesex University, Queensway, Enfield, Middlesex EN3 4SA, UK
H. Garelick*
Affiliation:
School of Health and Social Sciences, Middlesex University, Queensway, Enfield, Middlesex EN3 4SA, UK
E. Valsami-Jones
Affiliation:
Department of Mineralogy, The Natural History Museum, Cromwell Road, London, SW7 5BD, UK
*
*E-mail: h.garelick@mdx.ac.uk
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Abstract

Arsenic(V) removal from aqueous solution following addition of either a mixture of synthetic hydroxylapatite and baryte or bone-char is discussed. Arsenic concentrations of 4, 10 and 100 mg/l were investigated and additions of 0.2—10 g/l of solid (hydroxylapatite, baryte or bone-char) were tested, at an initial pH of either 5 or 7. Although the mixture of hydroxylapatite and baryte had a small influence on arsenic concentrations, bone-char was found to be a very effective sorbing agent for arsenic(V). Packed-column studies to investigate the bone-char capacity, followed by leaching tests were carried out. The capacity of bone-char was found to be superior to that of granular activated carbon. The experiments presented here indicate that the mechanism involved is adsorption rather than co-precipitation.

Keywords

arsenicbone-charhydroxylapatitebarytegranular activated carbonadsorptionremediation
Type
Research Article
Information
Mineralogical Magazine , Volume 69 , Issue 5 , October 2005 , pp. 769 - 780
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 2005

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Footnotes

†

Present address: Cawthorn Institute, 98 Halifax St. East, Private Bag 2, Nelson, New Zealand

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