兰州市冬季室内外颗粒物污染特征及其理化特性研究

发布时间：2018-04-24 23:08

本文选题：大气污染 + 冬季　；参考：《环境与健康杂志》2016年01期

【摘要】：目的探讨兰州市冬季室内外颗粒物污染特征及其理化特性。方法于2012年11月至2013年1月在不同采样点(混合区、工业区、郊区、公共场所)连续采集大气颗粒物(PM2.5和PM10)样品,分别采用离子色谱法和原子吸收分光光度法测定PM2.5和PM10中水溶性离子(F-、Cl-、NO3-、SO42-、Na+、NH4+、K+、Mg2+、Ca2+)和重金属(Fe、Pb、Cd和Cu)。结果调查期间PM2.5和PM10浓度均超过GB 3095—2012《环境空气质量标准》二级标准限值。除公共场所PM2.5外,其余采样点PM2.5和PM10污染均呈现为室外高于室内;室内颗粒物中水溶性离子主要为SO42-、NO3-、Cl-和NH4+,室外主要为SO42-、NO3-和Cl-;水溶性离子对PM2.5的贡献室外高于室内,对PM10的贡献则相反;室内外颗粒物中重金属污染均表现为室外高于室内,城区高于郊区,且Fe污染水平整体较高,Pb、Cd分别在混合区和工业区污染较重。结论本次调查的兰州市冬季室内外颗粒物污染较为严重,应进一步关注颗粒物中水溶性离子、铅、镉的污染水平。
[Abstract]:Objective to study the indoor and outdoor particulate pollution and its physical and chemical characteristics in Lanzhou. Methods from November 2012 to January 2013, atmospheric particulate matter (PM2.5 and PM10) samples were collected from different sampling sites (mixed areas, industrial areas, suburbs, public places). Ion chromatography and atomic absorption spectrophotometry (AAS) were used to determine the water-soluble ions (F-Cl-no _ 3-O _ 4SO _ 42-Na), NH _ 4-K _ 2O _ (2) mg _ (2) Ca ~ (2 +) and the heavy metals (Fe, Pb, CD and Cu ~ (2 +)) in PM2.5 and PM10, respectively. Results during the investigation period, the concentrations of PM2.5 and PM10 exceeded the second class limit of GB 3095-2012. Except for PM2.5 in public places, the pollution of PM2.5 and PM10 in other sampling sites was higher than that in indoor, the main water-soluble ions in indoor particulate were so _ 42-no _ 3-O _ 3-Cl- and NH4, and so _ 42-no _ 3- and Cl _ (-) in outdoor, and the contribution of water-soluble ions to PM2.5 was higher than that in indoor. The pollution of heavy metals in indoor and outdoor particulate matter was higher than that in indoor, urban area was higher than that in suburban area, and Fe pollution level was higher than that in suburban area, and the pollution level of Fe was higher in mixed area and industrial area, respectively. Conclusion the indoor and outdoor particulate pollution in Lanzhou is serious in winter, and the pollution level of water soluble ions, lead and cadmium should be paid more attention to.
【作者单位】：兰州大学资源环境学院;甘肃省环境污染预警和控制重点实验室;兰州大学大气科学学院;
【基金】：国家自然科学基金(41075102) 中央高校基本科研业务费专项资金(lzujbky-2013-m03;lzujbky-2014-101)
【分类号】：R122;X513

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