The As release from coprecipitation products naturally formed in Bangladesh groundwaters was compared with that from synthetic Fe-As precipitates. Iron oxy(hydr)oxides were the main component of all materials, but the natural coprecpitates also contained carbonates, phosphates and microbial organic matter. Synthetic coprecipitation products released more As than the natural ones with several diluted extractants. Kinetics of As release from synthetic Fe-As coprecipitates, evidenced an hindrance in As mobilization when a coverage of Ca-polygalacturonate was introduced. Hence, the organic interface could be a key-factor in affecting the stability of such systems.

Arsenic mobility in natural and synthetic coprecipitation products

Martin M.;Balint R.;Gorra R.;Celi L.;Barberis E.;
2016

Abstract

The As release from coprecipitation products naturally formed in Bangladesh groundwaters was compared with that from synthetic Fe-As precipitates. Iron oxy(hydr)oxides were the main component of all materials, but the natural coprecpitates also contained carbonates, phosphates and microbial organic matter. Synthetic coprecipitation products released more As than the natural ones with several diluted extractants. Kinetics of As release from synthetic Fe-As coprecipitates, evidenced an hindrance in As mobilization when a coverage of Ca-polygalacturonate was introduced. Hence, the organic interface could be a key-factor in affecting the stability of such systems.
Arsenic Research and Global Sustainability - 6th International Congress on Arsenic in the Environment, As 2016
Stockholm
19-23 July 2016
Arsenic Research and Global Sustainability - Proceedings of the 6th International Congress on Arsenic in the Environment, As 2016
270
271
Arsenic, Iron, Coprecipitation
Martin M.; Balint R.; Gorra R.; Celi L.; Barberis E.; Violante A.
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/2318/1661556
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