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

Sneddon, I. R., Garelick, Hemda ORCID: https://orcid.org/0000-0003-4568-2300 and Valsami-Jones, Eugenia (Éva) (2005) An investigation into arsenic(V) removal from aqueous solutions by hydroxylapatite and bone-char. Mineralogical Magazine, 69 (5) . pp. 769-780. ISSN 0026-461X [Article] (doi:10.1180/0026461056950287)

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.

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