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天津市某小学儿童个体PM2.5暴露特征及来源解析

张 楠 韩 斌 何 飞 许 嘉 牛 璨 白志鹏 徐 鹤

张 楠, 韩 斌, 何 飞, 许 嘉, 牛 璨, 白志鹏, 徐 鹤. 天津市某小学儿童个体PM2.5暴露特征及来源解析[J]. 环境科学研究, 2015, 28(3): 347-354.
引用本文: 张 楠, 韩 斌, 何 飞, 许 嘉, 牛 璨, 白志鹏, 徐 鹤. 天津市某小学儿童个体PM2.5暴露特征及来源解析[J]. 环境科学研究, 2015, 28(3): 347-354.
ZHANG Nan, HAN Bin, HE Fei, XU Jia, NIU Can, BAI Zhipeng, XU He. Characterization and Source Apportionment of Children's Personal Exposure to PM2.5 in a Primary School in Tianjin[J]. Research of Environmental Sciences, 2015, 28(3): 347-354.
Citation: ZHANG Nan, HAN Bin, HE Fei, XU Jia, NIU Can, BAI Zhipeng, XU He. Characterization and Source Apportionment of Children's Personal Exposure to PM2.5 in a Primary School in Tianjin[J]. Research of Environmental Sciences, 2015, 28(3): 347-354.

天津市某小学儿童个体PM2.5暴露特征及来源解析

基金项目: 国家重点基础研究发展计划(973)项目(2011CB503801);国家自然科学基金项目(20977054)

Characterization and Source Apportionment of Children's Personal Exposure to PM2.5 in a Primary School in Tianjin

  • 摘要: 为探讨儿童个体PM2.5暴露水平及来源,分别于2010年5月17日—6月24日(夏季)和11月8日—12月3日(冬季)对36名9~12岁小学生进行个体PM2.5暴露样品的采集和分析. 结果表明:天津市某小学儿童夏、冬两季个体PM2.5暴露浓度(以质量浓度计)分别为(74.7±29.5)和(122.4±42.3)μg/m3,冬季暴露水平高于夏季,可能与冬季取暖有关. 两季PM2.5载带的Al和Si,Zn、Pb和Mn的质量浓度分别呈显著相关;夏、冬两季SO42-和NO3-质量浓度之和分别占个体PM2.5暴露浓度的43.3%和39.5%. 夏、冬两季NO3-和SO42-质量浓度平均值之比分别为2.3和0.6,说明夏季机动车排放为主导源,冬季则为固定源(如工业源和燃煤源). 冬季OC(有机碳)和EC(无机碳)质量浓度分别高于夏季,与PM2.5质量浓度的季节变化趋势一致. 源解析结果表明,天津市儿童夏季PM2.5暴露的来源为二次源、机动车排放、土壤尘、工业源和机动车添加剂,贡献率分别为30.4%、28.9%、12.8%、20.8%和7.1%;冬季则为二次源、机动车排放、土壤尘、工业源、燃煤源和道路尘,贡献率分别为26.5%、24.5%、13.7%、10.3%、19.9%和5.1%.

     

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