内蒙古巴彦淖尔市临河区富硒耕地硒形态特征及其影响因素

doi:10.11720/wtyht.2023.1010

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Abstract

This study investigated the speciation of selenium in 51 surface soil samples from the selenium-rich cultivated land in Linhe District, Bayannur City, Inner Mongolia and explored the content and speciation of selenium and their influencing factors. The results showed that the surface soil in the study area had total selenium content of (0.19~0.48)×10^-6, averaging 0.33×10^-6, indicating a soil environment with moderate-high selenium content. Among the seven forms of selenium speciation, major forms include the residue, humic acid bound, and strong organic bound forms. The remaining forms, namely water-soluble, ion exchange, iron-manganese oxide bound, and carbonate bound forms accounted for only 13.67%. Water-soluble selenium consisted mainly of moderate-high water-soluble selenium (92.16%), with the absence of water-soluble selenium deficiency. The selenium content in each form was highly correlated with the total selenium content in the soil. The organic matter content, pH, Eh, and CEC had different effects on the distribution characteristics of selenium speciation.

Key words： Bayannur City selenium-rich soil selenium form water-soluble form influencing factor

Received: 11 January 2022 Published: 27 April 2023

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	Articles by authors
	Shi-Bao LI
	Li-Guo YANG
	Wan-Li XIONG
	Zhi-Chao MA
	Hong-Wei YUAN
	Ji-Xue DUAN

Cite this article:

Shi-Bao LI,Li-Guo YANG,Wan-Li XIONG, et al. Speciation of selenium in the selenium-rich cultivated land in Linhe District, Bayannur City, Inner Mongolia and its influencing factors[J]. Geophysical and Geochemical Exploration, 2023, 47(2): 477-486.

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https://www.wutanyuhuatan.com/EN/10.11720/wtyht.2023.1010 OR https://www.wutanyuhuatan.com/EN/Y2023/V47/I2/477

Traffic location (a) and topsoil sample distribution (b) in the study area

Accuracy and precision for analysis method of various indicators

Statistical characteristics of soil selenium speciation in the study area

Evaluation results of water-soluble selenium classification in the study area

Average contents of selenium forms of different soil types in the study area10^-6

The basic properties of tidal irrigation and salinization irrigation in the study area

Relationship between total selenium and various forms of selenium and physical and chemical properties in the study area

Correlation between some selenium forms and totle selenium content in the study area

Correlation between organic matter and total selenium content and some selenium forms in the study area

Correlation between pH and total seleniumcontent and some selenium forms in the study area

Correlation between Eh and water-soluble state selenium in the study area

E_h-pH of selenium at 25 ℃ and 1 atm pressure

Correlation between CEC and total selenium and water-soluble state selenium in the study area

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