Relative importance of different exposure routes of heavy metals for humans living near a municipal solid waste incinerator
Relative importance of different exposure routes of heavy metals for humans living near a municipal solid waste incinerator
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DOI：
10.1016/j.envpol.2017.04.002
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发表时间：
2017-07-01
影响因子：
8.9
通讯作者：
Hu, Jianying
中科院分区：
文献类型：
--
作者：
Li, Tong;Wan, Yi;Hu, Jianying
城市固体废物焚烧炉（MSWI）排放的有毒化学物质（例如重金属）对健康的潜在影响受到当地居民的高度关注，但关于不同暴露途径的贡献及其对生活在城市固体废物焚烧炉附近居民身体负担的影响的研究却很少。本研究通过调查中国南方深圳垃圾焚烧厂周围收集的食品（如蔬菜、农作物、肉类和水果等）、饮用水、环境空气和土壤中的金属，评估了铅、铬、镉和锰等重金属的多种暴露途径。蔬菜摄入对铅和铬的日均总剂量影响最大，谷物是锰和镉的主要暴露途径。调查地区存在化合物特异性污染，周围环境中存在Pb和Cr，当地蔬菜中的Pb和Cr积累水平较高，摄入受污染的蔬菜食品对人体Pb和Cr负荷影响较大。与参考人群相比，当地居民检测到的 Pb 和 Cr 血液浓度始终较高，而 Cd 和 Mn 没有显着差异。结果可能表明，垃圾焚烧厂的排放影响了本研究中Pb和Cr主要途径的外照射剂量，并导致生活在垃圾焚烧厂附近的人类体内金属负荷不同。垃圾焚烧厂-当地食物-人类是生活垃圾焚烧厂附近居民的重要暴露途径，因此在制定未来的战略和政策以防止生活垃圾焚烧厂附近居民遭受高风险时不应忽视。 (C) 2017 Elsevier Ltd. 保留所有权利。
The potential health effects of toxic chemicals (e.g. heavy metals) emitted by municipal solid waste incinerators (MSWIs) are of great concern to local residents, however there have been few studies on the contributions of different exposure pathways and their subsequent effects on the body burden of residents living near MSWIs. In this study, multiple exposure routes of heavy metals including Pb, Cr, Cd and Mn were assessed by investigating the metals in foods (such as vegetables, crops, meats and fruits etc.), drinking water, ambient air and soil collected surrounding an MSWI in Shenzhen, south China. Vegetable ingestion played the most important role in the total average daily dose of Pb and Cr, and cereals were the key exposure routes for Mn and Cd. Compound-specific contaminations were observed in the investigated areas, with Pb and Cr present in the surrounding environment, having accumulated to relatively high levels in the local vegetables, and the intake of contaminated vegetable foods greatly influencing the body burden of Pb and Cr. Consistently, significantly high blood concentrations of Pb and Cr were detected in the local residents compared to a referenced population, and a lack of significant differences was found for Cd and Mn. The results possibly suggested that emission of MSWI influenced the external exposure doses of the major pathways of Pb and Cr in this study, and resulted in the different body burden of metals in humans living near a MSWI. MSWI-local food-humans is an important exposure pathway for residents living near MSWI, and thus should not be neglected in developing future strategies and policies to prevent the high risks suffered by residents living near MSWIs. (C) 2017 Elsevier Ltd. All rights reserved.