Microscale Investigation into Selenium Distribution and Speciation in Se‐Rich Soils from Enshi, China

• Published in: Bulletin of environmental contamination and toxicology 2021, Vol.106 (1), p.40-43
• Main Authors: Qin, Hai-Bo, Zhu, Jian-Ming, Tan, Decan, Xu, Wen-Po, Liang, Dong-Xu, Takahashi, Yoshio
• Format: Article
• Language: English
• Subjects: Agricultural land; Aquatic Pollution; Bioavailability; Biogeochemical cycles; Biogeochemistry; Chemical speciation; China; Dietary minerals; Earth and Environmental Science; Ecotoxicology; Environment; Environmental Chemistry; Environmental Health; Geochemistry; Investigations; Laboratories; Pollution; Science; Selenium; Selenium - analysis; Soil; Soil environment; Soil investigations; Soil Pollutants - analysis; Soil Science & Conservation; Soils; Speciation; Spectroscopy; Spectrum analysis; Toxicology; Waste Water Technology; Water Management; Water Pollution Control; X ray absorption; X-Ray Absorption Spectroscopy; X-ray fluorescence; X-rays
• ISSN: 0007-4861; 1432-0800
• DOI: 10.1007/s00128-020-03090-7

In this study, we investigated the distribution and chemical speciation of Se in Se-rich soil by using micro-focused X-ray absorption near-edge structure (μ-XANES) spectroscopy coupling with X-ray fluorescence (μ-XRF) mapping. The microscale distribution showed that Se is heterogeneously distributed in the soil from seleniferous areas in Enshi, China. Se K-edge μ-XANES analysis suggested that Se is mainly present as Se(IV), organic Se(-II) or Se(0) species in Se-rich agricultural soil. The findings from this study would help improve the understanding of the fate, mobility, bioavailability, and biogeochemical cycling of Se in the seleniferous soil environment.