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Arsenic speciation and bioaccessibility in arsenic-contaminated soils: Sequential extraction and mineralogical investigation

Kim, Eun Jung ; Yoo, Jong-Chan ; Baek, Kitae

Environmental pollution (1987), 2014-03, Vol.186, p.29-35 [Peer Reviewed Journal]

Kidlington: Elsevier Ltd

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Title:
Arsenic speciation and bioaccessibility in arsenic-contaminated soils: Sequential extraction and mineralogical investigation
Author: Kim, Eun Jung ; Yoo, Jong-Chan ; Baek, Kitae
Subjects: Applied sciences ; Arsenic ; Arsenic - analysis ; Arsenic - chemistry ; Arsenicals - analysis ; Bioaccessibility ; Bioavailability ; Biological and physicochemical properties of pollutants. Interaction in the soil ; Earth sciences ; Earth, ocean, space ; Engineering and environment geology. Geothermics ; Environmental Monitoring ; Environmental Pollution ; Environmental Restoration and Remediation ; Exact sciences and technology ; Extraction ; Ferric Compounds - analysis ; Iron - analysis ; Iron oxides ; Minerals - analysis ; Mining ; Pollution ; Pollution, environment geology ; Soil ; Soil - chemistry ; Soil and sediments pollution ; Soil Pollutants - analysis ; Soil Pollutants - chemistry ; Soils ; Solid-state speciation ; Speciation ; Sulfates - analysis ; Sulfides ; Sulfides - analysis ; Weathering ; X-Ray Diffraction
Is Part Of: Environmental pollution (1987), 2014-03, Vol.186, p.29-35
Notes: ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
Description: In this study, a combination of sequential extraction and mineralogical investigation by X-ray diffraction and X-ray photoelectron spectroscopy was employed in order to evaluate arsenic solid-state speciation and bioaccessibility in soils highly contaminated with arsenic from mining and smelting. Combination of these techniques indicated that iron oxides and the weathering products of sulfide minerals played an important role in regulating the arsenic retention in the soils. Higher bioaccessibility of arsenic was observed in the following order; i) arsenic bound to amorphous iron oxides (smelter-2), ii) arsenic associated with crystalline iron oxides and arsenic sulfide phase (smelter-1), and iii) arsenic associated with the weathering products of arsenic sulfide minerals, such as scorodite, orpiment, jarosite, and pyrite (mine). Even though the bioaccessibility of arsenic was very low in the mine soil, its environmental impact could be significant due to its high arsenic concentration and mobility. [Display omitted] •Combination of sequential extraction and mineralogical investigation was employed.•Arsenic was primarily associated with iron oxides and sulfide minerals in soils.•Bioaccessibility of arsenic was affected by arsenic solid-phase speciation. We investigated arsenic solid-state speciation in soils, which is crucial for risk assessment and developing suitable remediation strategies in arsenic contaminated sites.
Publisher: Kidlington: Elsevier Ltd
Language: English

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Arsenic speciation and bioaccessibility in arsenic-contaminated soils: Sequential extraction and mineralogical investigation

Kim, Eun Jung ; Yoo, Jong-Chan ; Baek, Kitae

Kidlington: Elsevier Ltd

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