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Quantitative source apportionment and human toxicity of indoor trace metals at university buildings

机译：大学建筑室内痕量金属的定量源分配和人类毒性

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This study focuses on the source apportionment principal component analysis of indoor particulate matter (PM10) composition in two university buildings with different ventilation systems. A low volume sampler using Teflon filter paper was used to collect the PM10 samples and inductively coupled plasma mass spectrometry was used to determine the concentration of heavy metals. The potential human health damage due to the inhalation of carcinogenic and non-carcinogenic elements was also determined based on the USEPA standard. The results showed PM10 concentrations recorded in Building 1 and Building 2 ranged between 19.1 and 237 mu g m(-3) and 23.4-159 mu g m(-3), respectively. In Building 1, the principal component analysis (PCA) and multiple linear regression (MLR) showed that the main sources of pollutants in PM10 were the crustal source (20%), indoor-induced (8%), urban origin (7%) and the Earth's crust (6%). The main sources of pollutants in Building 2 were combustion (21%), biogenic (6%), anthropogenic (4%) and crustal (3%). The effective lifetime carcinogenic risks (ELCR) in Buildings 1 and 2 were 1.90E-3 and 1.65E-4, respectively. The hazard quotient (HQ) represents the non-carcinogenic risk, with 7.73 and 6.46 in Building 1 and Building 2, respectively. These ECLR and HQ values exceed the acceptable limit and are higher compared to the standard from the United States Environmental Protection Agency's Guidelines for the assessment of carcinogen risk. It was suggested that different types of ventilation influence the PM10 distribution in buildings and associated risks towards the occupant's health and indoor air quality. (C) 2017 Elsevier Ltd. All rights reserved.
机译：这项研究的重点是在两座通风系统不同的大学建筑中，室内颗粒物（PM10）成分的源分配主成分分析。使用特富龙滤纸的小体积采样器收集PM10样品，电感耦合等离子体质谱法确定重金属的浓度。还根据USEPA标准确定了由于吸入致癌和非致癌元素而对人体健康造成的潜在危害。结果显示，在1号楼和2号楼中记录的PM10浓度分别在19.1和237μg m（-3）和23.4-159μgm（-3）之间。在1号楼中，主成分分析（PCA）和多元线性回归（MLR）显示，PM10中的主要污染物来源为地壳来源（20％），室内引起的（8％），城市起源（7％）和地壳（6％）。 2号楼污染物的主要来源是燃烧（21％），生物（6％），人为（4％）和地壳（3％）。 1号楼和2号楼的有效终生致癌风险（ELCR）分别为1.90E-3和1.65E-4。危险商（HQ）表示非致癌风险，分别在1号楼和2号楼中为7.73和6.46。这些ECLR和HQ值超过了可接受的极限，并且比美国环境保护局的致癌物风险评估指南中的标准更高。有人建议，不同类型的通风会影响建筑物中PM10的分布以及对乘员健康和室内空气质量的相关风险。 （C）2017 Elsevier Ltd.保留所有权利。

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