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首页> 外文期刊>International Journal of Environmental Research and Public Health >Seasonal Characteristics of the Chemical Composition of Fine Particles in Residences of Nanjing, China
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Seasonal Characteristics of the Chemical Composition of Fine Particles in Residences of Nanjing, China

机译：南京住宅中细颗粒化学成分的季节特征

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摘要

Indoor fine particulate matter (PM 2.5 ) and its chemical composition is important for human exposure as people spend most of their time indoors. However, few studies have investigated the multiseasonal characteristics of indoor PM 2.5 and its chemical composition in China. In this study, the chemical composition of PM 2.5 samples in residences was analyzed over four seasons in Nanjing, China. Indoor water-soluble ions exhibited similar seasonal variations (winter autumn summer spring) to those from outdoors (winter autumn spring summer) except in summer. Whereas, indoor metallic elements exhibited a different seasonal pattern from that of outdoors. The highest concentrations of indoor metallic elements were observed in summer when the outdoor concentrations were low. The different seasonal variations of the chemical composition between indoor and outdoor PM 2.5 indicated that people should consider both indoor and outdoor sources to reduce their exposure to air pollutants in different seasons. The carcinogenic risks for metallic elements were within the acceptable levels, while manganese (Mn) was found to have potential noncarcinogenic risk to humans. More attention should be paid to the pollution of Mn in the study area in the future. Moreover, the cumulative effect of noncarcinogenic PM 2.5 -bound elements should not be ignored.
机译：由于人们大部分时间都在室内度过，因此室内细颗粒物（PM 2.5）及其化学成分对于人体暴露至关重要。然而，很少有研究调查室内PM 2.5的多季节特征及其化学成分。在这项研究中，分析了中国南京四个季节居民住宅中PM 2.5样品的化学成分。除夏季外，室内水溶性离子的季节变化（冬季>秋季>夏季>春季）与室外的离子相似（冬季>秋季>春季>夏季）。而室内金属元素表现出与室外不同的季节性模式。夏季室外浓度较低时，室内金属元素的浓度最高。室内和室外PM 2.5之间化学成分的不同季节变化表明，人们应同时考虑室内和室外污染源，以减少不同季节暴露于空气污染物的情况。金属元素的致癌风险在可接受的范围内，而锰（Mn）被发现对人类具有潜在的非致癌风险。今后应更加关注研究区锰的污染。而且，非致癌性PM 2.5结合元素的累积作用不容忽视。

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