NDLI: Adsorption of antimony(v) by floodplain soils, amorphous iron(iii) hydroxide and humic acid

Content Provider	Royal Society of Chemistry (RSC)
Author	Wilson, Susan Tighe, Matthew Lockwood, Peter
Copyright Year	2005
Abstract	Antimony (Sb) emissions to the environment are increasing, and there is a dearth of knowledge regarding Sb fate and behaviour in natural systems. In particular, there is a lack of understanding of sorption of the oxidised Sb(V) species onto soils and soil phases. In this study sorption of Sb(V) by two organic rich soils with high levels of oxalate extractable Fe was examined over the pH range of 2.5–7. Furthermore, the sorption behaviour of Sb(V) was examined in two phases mimicking those dominant in the experimental soils, namely a solid humic acid and an amorphous Fe(OH)3, across the same pH range. Sorption of Sb by the soils and the humic acid fitted a Freundlich type isotherm, with the equation parameters reflecting changes in bonding affinity corresponding to pH changes. The soils sorbed >75% of the added Sb in all trials, and 80–100% at pH values less than approximately 6.5. The Fe(OH)3 retained >95% of the added Sb in all experiments. The humic acid sorbed up to 60% of the added Sb at acidic pH values, but sorption decreased to zero at higher pH values. Further adsorption studies are recommended, such as examining the effects of ion competition and changes in ionic strength.
Starting Page	1177
Ending Page	1185
Page Count	9
File Format	HTM / HTML PDF
ISSN	14640325
Volume Number	7
Issue Number	12
Journal	Journal of Environmental Monitoring
DOI	10.1039/b508302h
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Subscribed
Subject Keyword	Antimony Freundlich Sorption PH Acid Adsorption Ion Ionic strength
Content Type	Text
Resource Type	Article
Subject	Public Health, Environmental and Occupational Health Management, Monitoring, Policy and Law

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