An analysis of influencing factors on the release of different species of uranium from uranium tailings and their correlation
PEI Jing-jing, HU Nan, ZHANG Hui, DAI Zhong-ran, DING De-xin, YU Zhao-Hui
Key Discipline Laboratory for National Defense for Biotechnology in Uranium Mining and Hydrometallurgy, Hunan Province Key Laboratory of Green Development Technology for Extremely Low Grade Uranium Resources, University of South China, Hengyang 421001, China
The influences of liquid-solid ratio, leaching time, acid rain pH, PO43-, CO32-, 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 > CO32- > humic acid > leaching time > PO43- > liquid-solid ratio, the first four factors were the main ones, and there was the strongest correlation between CO32- 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 > CO32- > humic acid > acid rain pH>PO43-, the first four factors were the main ones, and there was the strongest correlation between PO43- 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 PO43- > humic acid>CO32- > acid rain pH > liquid-solid ratio>Ca2+ > leaching time, the first four factors were the main ones, and there was the strongest correlation between PO43- and CO32-.
裴晶晶, 胡南, 张辉, 戴仲然, 丁德馨, 於照惠. 铀尾矿中不同形态铀释放的影响因素及其相关性[J]. 中国环境科学, 2019, 39(7): 3073-3080.
PEI Jing-jing, HU Nan, ZHANG Hui, DAI Zhong-ran, DING De-xin, YU Zhao-Hui. An analysis of influencing factors on the release of different species of uranium from uranium tailings and their correlation. CHINA ENVIRONMENTAL SCIENCECE, 2019, 39(7): 3073-3080.
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