Distributions of the total concentration, bioavailability, and speciation of selenium in soils in Luoyang City, Henan Province, China
TIAN Qiang-Guo1(), HOU Jin-Kai1, YANG Zai-Wei2,3, LI Li-Yuan2,3()
1. Institute of Geology and Mineral Resources Survey, Henan Bureau of Geology and Mineral Development, Luoyang 471023, China 2. School of Environment and Natural Resources, Zhejiang University of Science and Technology, Hangzhou 310023, China 3. Key Laboratory of Recycling and Eco-Treatment of Waste Biomass of Zhejiang Province, Hangzhou 310023, China
Targeting the selenium resource in soils of Luoyang City, Henan Province, this study analyzed the distribution of total selenium concentration under different geological settings, soil types, land use types, acidity and alkalinity, and organic matter. Furthermore, it determined the bioavailability and speciation distribution of selenium in the soils. The results indicate that: (1) The soils in Luoyang City have total selenium concentrations of (0.03~5.67)×10-6, with an average of 0.30×10-6, and the area of soils with moderate and rich selenium accounts for 94.73%; (2) The average selenium concentration is the highest in soils of the Jixian Yunmengshan formation and the lowest in soils of the Cambrian Xinji Formation; (3) The average total selenium concentration is the highest in lime concretion black soil and the lowest in paddy soil; (4) Regarding land use types, the average total selenium concentration is relatively high in soils of paddy land and woodland; (5) Soils with high acidity and high organic matter concentrations are favorable for selenium enrichment; (6) In terms of soil types, the average concentration of bioavailable selenium is the highest in fluvo-aquic soils and the lowest in red clays; (7) The average concentration of bioavailable selenium is higher in alkaline soils than in neutral and acidic soils; (8) Selenium in soils primarily occurs in residue, strong organic bound, and humic acidic bound forms, with the highest average concentration of bioavailable selenium occurring in alkaline soils and red clays. The selenium resource in the soils in Luoyang City has high utilization potential, and it is feasible to conduct targeted development and planning of the selenium-rich industry according to the distribution of total selenium concentration in the study area.
田强国, 侯进凯, 杨在伟, 李立园. 河南省洛阳市土壤硒全量、有效性及形态分布特征[J]. 物探与化探, 2023, 47(5): 1371-1378.
TIAN Qiang-Guo, HOU Jin-Kai, YANG Zai-Wei, LI Li-Yuan. Distributions of the total concentration, bioavailability, and speciation of selenium in soils in Luoyang City, Henan Province, China. Geophysical and Geochemical Exploration, 2023, 47(5): 1371-1378.
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