Geochemical characteristics of selenium, fluorine, iodine in surface soil of the agricultural land in Ruoqiang County, Xinjiang
MA Chang-Lian1,2,3(), ZHOU Jin-Long1,2,3(), ZENG Yan-Yan1,2,3, REN Gui-Bing1,2,3, WANG Song-Tao4
1. College of Water Conservancy and Civil Engineering,Xinjiang Agricultural University,Urumqi 830052,China 2. Xinjiang Hydrology and Water Resources Engineering Research Center, Urumqi 830052, China 3. Xinjiang Key Laboratory of Hydraulic Engineering Security and Water Disasters Prevention,Urumqi 830052,China 4. No.2 Hydrogeology and Engineering Geology Party of Xinjiang Bureau of Geology and Mineral Resources Exploration and Development, Changji 831100, China
This study investigated the surface soil of the agricultural land in Ruoqiang County, Xinjiang. Based on 142 surface soil samples collected in 2016, this study analyzed the selenium (Se), fluorine (F), iodine (I), Al2O3, and SiO2 contents and the physicochemical proxies such as soil organic carbon (OrgC), total nitrogen (N), and pH of the surface oil in the study area. Then, this study explored the contents and distribution of biological elements Se, F, and I in the study area, as well as their influencing factors. The results are as follows. The soil in the study area is alkaline to strongly alkaline, with average Se, F, and I contents of 0.23×10-6, 645×10-6, and 1.06×10-6, respectively. The average contents of Se and I are lower than their national soil background values, while the average content of F is much higher than its national soil background value. The Se, F, and I contents are positively correlated with each other and all of them are significantly positively correlated with total N. The Se content is negatively correlated with the SiO2 content, while the I content is positively correlated with the Al2O3 content. The contents, distribution, and geochemical characteristics of Se, F, and I are controlled by parent materials and soil types. Among different parent materials, the Se, F, and I contents are higher in the soil of diluvium areas but are the lowest in the soil of alluvium-diluvium areas. Among different types of soil, the contents of the three elements are high in the irrigation-silted soil, while the Se content is the highest and the F and I contents are the lowest in the forest-shrub-grassland soil.
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MA Chang-Lian, ZHOU Jin-Long, ZENG Yan-Yan, REN Gui-Bing, WANG Song-Tao. Geochemical characteristics of selenium, fluorine, iodine in surface soil of the agricultural land in Ruoqiang County, Xinjiang. Geophysical and Geochemical Exploration, 2022, 46(6): 1573-1580.
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