Decoupling of arsenic and iron release from ferrihydrite suspension under reducing conditions: a biogeochemical model.

ABSTRACT: High levels of arsenic in groundwater and drinking water are a major health problem. Although the processes controlling the release of As are still not well known, the reductive dissolution of As-rich Fe oxyhydroxides has so far been a favorite hypothesis. Decoupling between arsenic and iron redox transformations has been experimentally demonstrated, but not quantitatively interpreted. Here, we report on incubation batch experiments run with As(V) sorbed on, or co-precipitated with, 2-line ferrihydrite. The biotic and abiotic processes of As release were investigated by using wet chemistry, X-ray diffraction, X-ray absorption and genomic techniques. The incubation experiments were carried out with a phosphate-rich growth medium and a community of Fe(III)-reducing bacteria under strict anox

SUBMITTER: Burnol A 

PROVIDER: S-EPMC2246110 | biostudies-literature | 2007 Nov

REPOSITORIES: biostudies-literature