Investigation of rare earth elements in drinking water of typical rare earth mining and non-mining areas in three provinces of China
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(1.China National Center for Food Safety Risk Assessment, Beijing 100022, China; ;2.Hangzhou Medical College, Zhejiang Hangzhou Hangzhou, Zhejiang Province, 310019, China)

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    Abstract:

    Objective To explore the concentrations of rare earth elements (Rare earth elements, REEs) in drinking water in rare earth mining and non-mining areas in Shandong, Guangdong, and Jiangxi provinces of China. Methods Typical rare earth mining areas and 3 non-mining areas in the 3 provinces were selected for investigation. Drinking water of people in mining areas and non-mining areas were collected for 3 consecutive days by duplicate portion method. The contents of La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Sc and Y in water samples were determined by inductively coupled plasma mass spectrometry (ICP-MS). Results The detection rate of each REEs in drinking water of mining and non-mining area was 12.98% to 86.64% and 1.07% to 69.04%, respectively. The average content of total REEs in drinking water in the mining area was 6.974 μg/L, with the maximum of 178.290 μg/L. The main elements were Ce, La, Nd, Y, Sc and Pr (≈90.0%). The average content of total REEs in drinking water in non-mining area was 0.772 μg/L, significantly lower than that in mining area (P<0.05); except for Tb, Ho and Tm, the contents of other REEs in drinking water from mining areas were significantly higher than those from non-mining areas (P<0.05). The total REEs contents in drinking water of mining areas in Guangdong and Jiangxi provinces were higher than that of non-mining areas (P<0.05), which were 90 times and 2 times of those of non-mining areas in average respectively. The average content of total REEs in drinking water of mining area in Shandong was higher than that of non-mining area, but with no statistical difference (P>0.05). Conclusion The contents of REEs in drinking water of mining area are higher than that of non-mining areas. Risk assessment of REEs exposure by drinking water should be further carried out for residents in mining areas.

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LOU Minhan, WANG Yibaina, SUI Haixia, MAO Weifeng, ZHANG Lei, LIU Zhaoping, WANG Yin, YONG Ling, SONG Yan. Investigation of rare earth elements in drinking water of typical rare earth mining and non-mining areas in three provinces of China[J].中国食品卫生杂志,2021,33(6):771-777.

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  • Received:September 16,2021
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  • Online: January 04,2022
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