Key Laboratory of Land Surface Pattern and Simulation, Institute of Geographical Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing, 100101, China.
University of Chinese Academy of Sciences, Beijing, 100049, China.
Environ Geochem Health. 2018 Dec;40(6):2795-2805. doi: 10.1007/s10653-018-0146-4. Epub 2018 Jul 9.
Particulate pollution, especially PM (particles with an aerodynamic equivalent diameter of 2.5 μm or less), has received increased attention in China recently. In this study, PM samples were collected in August 2013 and April 2014 from different regions of Baotou, the largest rare earth elements (REEs) processing city in northern China. The concentrations and distribution patterns of REEs in PM were analyzed, and the inhalation exposure to REEs associated with PM was assessed. The results showed that the REEs levels were 56.9 and 15.3 ng m in August 2013 and April 2014, respectively. These values are much higher than those in non-REEs mining areas. The distribution patterns of REEs exhibited LREE enrichment. The Eu and Ce anomalies displayed slightly positive and negative values, respectively, which were in accordance with the background soil and ore. The average daily intake amounts of REEs for population through inhalation exposure of PM in Baotou were in the range of 5.09 × 10 to 2.25 × 10 mg kg day.
颗粒物污染，尤其是 PM（空气动力学等效直径为 2.5μm 或以下的颗粒物），最近在中国受到了越来越多的关注。本研究于 2013 年 8 月和 2014 年 4 月在包头市（中国北方最大的稀土元素（REEs）加工城市）的不同地区采集了 PM 样本。分析了 PM 中 REEs 的浓度和分布模式，并评估了与 PM 相关的 REEs 的吸入暴露。结果表明，2013 年 8 月和 2014 年 4 月 REEs 的浓度分别为 56.9 和 15.3ngm。这些值远高于非 REEs 矿区的值。REEs 的分布模式表现为轻 REE 富集。Eu 和 Ce 异常分别呈现出轻微的正异常和负异常，这与背景土壤和矿石一致。包头市人群通过吸入 PM 暴露摄入 REEs 的平均日摄入量范围为 5.09×10 至 2.25×10mgkg day。
