燃煤限制前后与潜在有毒元素（PTEs）形态、生物可利用性和健康风险相关的 PM。
PM-bound potentially toxic elements (PTEs) fractions, bioavailability and health risks before and after coal limiting.
机构信息
Hebei Key Lab of Power Plant Flue Gas Multi-Pollutants Control, Department of Environmental Science & Engineering, North China Electric Power University, Baoding 071000, China.
Hebei Key Lab of Power Plant Flue Gas Multi-Pollutants Control, Department of Environmental Science & Engineering, North China Electric Power University, Baoding 071000, China; MOE Key Laboratory of Resources and Environmental Systems Optimization, College of Environmental Science and Engineering, North China Electric Power University, Beijing 102206, China.
出版信息
Ecotoxicol Environ Saf. 2020 Apr 1;192:110249. doi: 10.1016/j.ecoenv.2020.110249. Epub 2020 Feb 7.
Fractions, bioavailability, health risks of fine particulate maters (PM)-bound potentially toxic elements (PTEs) (Pb, Cd, Cr, Cu and Zn) were investigated before and after coal limiting in Baoding city. The winter PM samples were collected at different functional areas such as residential area (RA), industrial area (IA), suburb (SB), street (ST) and Botanical Garden Park (BG) in 2016 (coal dominated year) and 2017 (gas dominated year). The fractions and bioavailability of PTEs were determined and evaluated based on BCR sequential extraction. Health risks through inhalation exposure were evaluated by US EPA health risk assessment model. The results from different years and functional areas were compared and discussed. The fractions and bioavailability of PM-bound PTEs varied with functional areas. The percentages of cadmium (Cd) and zinc (Zn) in acid-soluble fraction (F1-Cd and F1-Zn) to the total amount of Cd and Zn were low in BG samples (p < 0.05). Bioavailability of Cd were high in SB samples (p < 0.05). Total contents of PM-bound PTEs in 2017 generally decreased compared with 2016. The differences of fraction and bioavailability between 2016 and 2017 depended on the elements and areas. Higher proportions of copper (Cu) in acid-soluble fraction (F1-Cu) and bioavailability of Cu (p < 0.05) were found in 2017 samples. Significant differences were found just at IA and RA for Pb, Cd and Zn. Our results indicated that the health risks from inhalation exposure for PTEs in PM declined about 11%-52% after the coal limiting in this city.
在实施煤炭限产后，研究人员调查了保定市冬季不同功能区（居民区、工业区、郊区、街道和植物园公园）大气细颗粒物（PM）中结合的潜在有毒元素（Pb、Cd、Cr、Cu 和 Zn）的赋存形态、生物可给性、健康风险。在 2016 年（煤炭主导年）和 2017 年（燃气主导年）采集 PM 样本。采用 BCR 连续提取法对 PTEs 赋存形态和生物可给性进行分析，采用美国环保署健康风险评估模型评估通过吸入暴露的健康风险。对比分析了不同年份和功能区的结果。结果表明，不同功能区的 PM 结合 PTEs 赋存形态和生物可给性存在差异。BG 中 Cd 和 Zn 的酸可提取态（F1-Cd 和 F1-Zn）占总量的比例较低（p<0.05）。SB 中 Cd 的生物可给性较高（p<0.05）。2017 年 PM 结合 PTEs 总量普遍低于 2016 年。2016 年和 2017 年的赋存形态和生物可给性差异取决于元素和区域。2017 年 F1-Cu 中 Cu 比例较高，Cu 的生物可给性也较高（p<0.05）。仅在工业区和居民区发现 Pb、Cd 和 Zn 存在显著差异。结果表明，实施煤炭限产后，该城市大气 PM 中 PTEs 经吸入暴露产生的健康风险降低了 11%-52%。
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