青海东部碱性土壤中硒的形态特征

doi:10.11720/wtyht.2019.0053

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Abstract

In this paper, the Se speciation characteristics of alkaline natural Se-rich soil in eastern Qinghai were studied by collection and analysis of surface soil samples with different Se values. The results show that Se exists in the form of effective state, including water soluble state and ion exchange state, which accounts for 6.38% of the total Se. Carbonate state and iron and manganese oxidation state account for 4.53% of the total Se. The values of both of them are higher than the proportion of corresponding form in some acidic and Se rich soils in China. The unusable state Se, including strong organic state, humic acid binding state and residue state , accounts for 89.09% of the total Se, lower than the level of non-available Se in some acidic and selenium rich soils. The feature of selenium rich soil in Qinghai Province exhibits higher available state, higher potential available state and lower unusable state. In addition to the iron and manganese oxidation state, the values of 6 forms of Se are positively correlated with the total Se. The values of total Se, humic acid binding Se and residue Se are significantly negatively correlated with pH value, thus the total Se and the non-available Se decrease with the increase of soil alkaline environment.

Key words： alkaline soil selenium-rich soil selenium speciation effective selenium correlation

Received: 22 January 2019 Published: 25 October 2019

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	Articles by authors
	Ya-Feng ZHANG
	Guo-Wen MIAO
	Qiang MA
	Bing-Yan JI
	Guang XU

Cite this article:

Ya-Feng ZHANG,Guo-Wen MIAO,Qiang MA, et al. Distribution characteristics of Se speciation of alkaline soil in eastern Qinghai[J]. Geophysical and Geochemical Exploration, 2019, 43(5): 1138-1144.

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https://www.wutanyuhuatan.com/EN/10.11720/wtyht.2019.0053 OR https://www.wutanyuhuatan.com/EN/Y2019/V43/I5/1138

Geochemical map of soil selenium and sampling point map in the study area

Statistical characteristics of Se speciation and pH in soil in the study area

Correlation analysis of Se speciation and pH in the study area

Relationship between different species of Se and total Se in soil in the study area

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