铀尾矿中不同形态铀释放的影响因素及其相关性

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Abstract

The influences of liquid-solid ratio, leaching time, acid rain pH, PO₄^3-, CO₃^2-, Ca²⁺ and humic acid concentration on the release of different species of uranium from uranium tailings in a uranium tailings repository were investigated by using the orthogonal tests, sequential extraction and principal component analysis. The degree of the influence of these factors on the release of the easily mobile species of uranium was in the order Ca²⁺ > acid rain pH > CO₃^2- > humic acid > leaching time > PO₄^3- > liquid-solid ratio, the first four factors were the main ones, and there was the strongest correlation between CO₃^2- and acid rain pH. The degree of the influence of these factors on the release of the potential migration species of uranium was in the order Ca²⁺ > liquid-solid ratio > leaching time > CO₃^2- > humic acid > acid rain pH>PO₄^3-, the first four factors were the main ones, and there was the strongest correlation between PO₄^3- and acid rain pH; and that the degree of the influence of these factors on the release of the stable species of uranium was in the order PO₄^3- > humic acid>CO₃^2- > acid rain pH > liquid-solid ratio>Ca²⁺ > leaching time, the first four factors were the main ones, and there was the strongest correlation between PO₄^3- and CO₃^2-.

Key words： uranium tailings uranium release uranium species orthogonal tests principal component analysis

Received: 05 December 2018

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X591

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	Articles by authors
	PEI Jing-jing
	HU Nan
	ZHANG Hui
	DAI Zhong-ran
	DING De-xin
	YU Zhao-Hui

Cite this article:

PEI Jing-jing,HU Nan,ZHANG Hui等. An analysis of influencing factors on the release of different species of uranium from uranium tailings and their correlation[J]. CHINA ENVIRONMENTAL SCIENCECE, 2019, 39(7): 3073-3080.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2019/V39/I7/3073

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