Bao T M, Tian Y, Wang L X, Wu T, Lu L N, Ma H Y, Wang L
School of Public Health, Baotou Medical College, Baotou 014040, China.
Zhonghua Lao Dong Wei Sheng Zhi Ye Bing Za Zhi. 2018 Feb 20;36(2):99-101. doi: 10.3760/cma.j.issn.1001-9391.2018.02.005.
To investigate the levels of lanthanum, cerium, praseodymium, and neodymium in the blood, urine, and hair samples from residents in the rare earth mining area of a city in China, and to provide a scientific basis for the control of rare earth pollution and the protection of population health. A total of 147 residents who had lived in the rare earth mining area of a city for a long time were selected as the exposure group, and 108 residents in Guyang County of this city who lived 91 km away from the rare earth mining area were selected as the control group. Blood, urine, and hair samples were collected from the residents in both groups. Inductively coupled plasma mass spectrometry was used to determine the content of lanthanum, cerium, praseodymium, and neodymium in blood, urine, and hair samples. In the exposure group, the median levels of lanthanum, cerium, praseodymium, and neodymium were 0.854, 1.724, 0.132, and 0.839 μg/L, respectively, in blood samples, 0.420, 0.920, 0.055, and 0.337 μg/L, respectively, in urine samples, and 0.052, 0.106, 0.012, and 0.045 μg/g, respectively, in hair samples. The exposure group had significantly higher levels of the four rare earth elements in blood, urine, and hair samples than the control group (<0.01) . The residents in the rare earth mining area of this city have higher content of lanthanum, cerium, praseodymium, and neodymium in blood, urine, and hair than those in the non-mining area; the content of cerium is highest, followed by lanthanum, neodymium, and praseodymium.
为调查中国某城市稀土矿区居民血液、尿液和头发样本中镧、铈、镨和钕的含量，为控制稀土污染和保护人群健康提供科学依据。选取长期居住在该城市稀土矿区的147名居民作为暴露组，选取该市固阳县距离稀土矿区91公里的108名居民作为对照组。采集两组居民的血液、尿液和头发样本。采用电感耦合等离子体质谱法测定血液、尿液和头发样本中镧、铈、镨和钕的含量。暴露组血液样本中镧、铈、镨和钕的中位数水平分别为0.854、1.724、0.132和0.839μg/L，尿液样本中分别为0.420、0.920、0.055和0.337μg/L，头发样本中分别为0.052、0.106、0.012和0.045μg/g。暴露组血液、尿液和头发样本中四种稀土元素的含量均显著高于对照组（<0.01）。该城市稀土矿区居民血液、尿液和头发中镧、铈、镨和钕的含量高于非矿区居民；铈的含量最高，其次是镧、钕和镨。
