Geochemical characteristics and genesis of selenium in soil in northern Muchuan County, Sichuan Province
HAN Wei1,2,3(), WANG Qiao-Lin1,2,3, SONG Yun-Tao1,2,3, PENG Min1,2,3, WANG Cheng-Wen1,2,3
1. Institute of Geophysical and Geochemical Exploration,CAGS,Langfang 065000,China 2. Research Center of Geochemical Survey and Assessment on Land Quality,CGS,Langfang 065000,China 3. Key Laboratory of Geochemical Cycling of Carbon and Mercury in the Earth's Critical Zone,CAGS,Langfang 065000,China
Based on geochemical investigation of land quality in northern Muchuan County of Sichuan Province, the authors identified the geochemical characteristics of Se element in the soil of the working area and carried out a study of its causes . The results show that the Se content of the soil in the working area ranges from 0.06×10-6 to 1.49×10-6, with an average value of 0.41×10-6. It is mainly dominated by selenium-enriched soil, which satisfies the conditions of selenium-enriched soil and possesses 60% of the whole working area. The content of Se in different parent rocks is quite different and tends to be enriched in the surface layer. The content of Se in soils with Xiangxi Group as the parent rock is higher but the content of heavy metals is lower; the content of Se is the highest in forest land in different land use types; the difference in content of Se in different soil types is relatively small. Correlation analysis shows that the Se content of the soil is significantly positively correlated with SOM, Pb, As, Cd, etc. Different parent rocks have a greater influence on the correlation between Se content and pH, indicating that the main factors of Se content in soil are parent rocks, SOM and heavy metal elements in the working area.
韩伟, 王乔林, 宋云涛, 彭敏, 王成文. 四川省沐川县北部土壤硒地球化学特征与成因探讨[J]. 物探与化探, 2021, 45(1): 215-222.
HAN Wei, WANG Qiao-Lin, SONG Yun-Tao, PENG Min, WANG Cheng-Wen. Geochemical characteristics and genesis of selenium in soil in northern Muchuan County, Sichuan Province. Geophysical and Geochemical Exploration, 2021, 45(1): 215-222.
Yang L C, Li M L, Yang T A, et al. Study on distribution characteristics of selenium content of surface soil and its influencing factors in Enshi City, Hubei Province[J]. Resources Environment & Engineering, 2015,29(6):825-829.
Chang C Y, Yin R S, Wang X, et al. Selenium translocation in the soil-rice system in the Enshi seleniferous area, central China[J]. Science of the Total Environment, 2019,669:83-90.
Huang C L, Song M Y, Wei Y C, et al. Study on selenium contents of typical selenium-rich soil in the middle area of Zhejiang and its influencing factors[J]. Environmental Science, 2013,34(11):4405-4410.
Zhou M, Chen G G, Zhang M, et al. Geochemical characteristics and influencing factors of selenium in soils of south Jiangxi province: A typical area of Qingtang-Meijiao[J]. Geoscience, 2018,32(6):1292-1301.
Xiao G Q, Zong Q X, Xiang L Z, et al. Geochemical characteristics and influencing factors of Selenium in soils and agricultural products in the Jiucheng-Jiemao area, Yingjiang County, Yunnan Province[J]. Geophysical and Geochemical Exploration, 2020,44(2):412-418.
Feng C X, Liu S, Hu R Z, et al. Geochemistry of lower Cambrian Se-rich black rock series in Zunyi, Guizhou Province,southwest China: The petrogenesis and enrichment mechanism of selenium[J]. Earth Science Journal of China University of Geosciences, 2010,35(6):947-958.
Zhu J M, Liang X B, Ling H W, et al. Advances in studying occurrence modes of selenium in environment[J]. Bulletin of Mineralogy, Petrology and Geochemistry, 2003,22(1):75-81.
Swaine D J, Goodarzi F. Environmental aspects of trace elements in coal[M]. Netherlands: Kluwer Academic Publisers, 1995.
Elrashidi M A, Adriano D C, Workman S M, et al. Chemical equilibria of selenium in soil: A theoretical development[J]. Soil Science, 1987,144(2):141-151.
Jayaweera G R, Biggar J W. Role of redox potential in chemical transformations of selenium in soils[J]. Soil Science Society of America Journal, 1996,60:1056-1063.