【作者】 韩月梅； 沈振兴； 曹军骥； 李旭祥； 周娟； 霍宗权；

【Author】 HAN Yue-mei~1,SHEN Zhen-xing~1,CAO Jun-ji~2,LI Xu-xiang~1,ZHOU Jun~1,HUO Zong-quan~1 (1.Department of Environmental Science and Engineering,Xi ’an Jiaotong University,Xi ’an,Shanxi 710049,China; 2.SKLLQG,Institute of Earth Environment,Chinese Academy of Sciences,Xi’an,Shanxi 710075,China)

【机构】 西安交通大学环境科学与工程系； 中国科学院地球环境研究所黄土与第四纪国家重点实验室；

【摘要】 为了解室内外PM_2.5和TSP的污染状况,自2008年3月24日至4月3日在学生教研室、教师办公室、实验室和室外同时采集PM_2.5和TSP样品,对其质量浓度及无机水溶性离子组分(Na⁺,NH₄⁺,K⁺,Mg²⁺,Ca²⁺,Cl^-,NO₃^-和SO₄^2-)进行了分析.结果表明,室内外PM_2.5和TSP浓度都远远高于美国空气质量标准规定的35μg/m³.室内外颗粒物浓度具有相同的变化规律,且室内总体上低于室外.室内PM_2.5在TSP中所占比例为65%～85%,室外在40%左右.室内外TSP和PM_2.5中二次污染离子SO₄^2-、NO₃^-和NH₄⁺占总离子质量的50%以上,主要富集在细颗粒上.NH₄⁺、K⁺和Cl^-在总离子中的比例均为室内大于室外,PM_2.5中大于TSP.Ca²⁺、Mg²⁺主要富集在粗颗粒上,室外含量远远高于室内.更多还原

【Abstract】 PM_2.5 and TSP samples were simultaneously collected from 24th march to 3rd April,2008,in three different rooms and outdoor to investigate the difference between indoor and outdoor.We analyzed the mass concentration and inorganic water-soluble ions (Na⁺,NH₄⁺,K⁺,Mg²⁺,Ca²⁺,Cl^-,NO₃^- and SO₄^2-) for all the samples.It showed that both of PM_2.5 and TSP mass concentration were much higher than 35μg/m³（U.S.air quality standards,2004）.Indoor and outdoor particulate concentrations changed similarly and indoor concentrations were lower than that of outdoor.Indoor PM_2.5 was take part of 65%-85%of indoor TSP,which was about 40%in the outdoor.The secondary pollution ions NH₄⁺、NO₃^-、SO₄^2- were the most important component in the indoor/outdoor particulate matters and were mainly observed in PM_2.5.The indoor proportion of NH₄⁺、K⁺ and Cl^- were all higher than that of the otitdoor,and especially in PM_2.5.Most of the Ca²⁺ and Mg²⁺ were found in the outdoor TSP.更多还原