天津市PM10中元素的浓度特征和富集特征研究

为了解天津市大气PM10中元素的浓度水平和污染元素的来源,在天津市布置了7个采样点,获得了风沙季、非采暖季和采暖季19个元素的监测数据。结果表明:Ni、Pb、Cu、Cr是PM10中的主要超标污染元素;K、Ca、Na、Mg、Al、Si、Fe、Ti等8种元素是PM10浓度的主要贡献率元素(92%);19个元素的富集系数风沙季明显低于非采暖季;Co、Cu、Zn、Br、Pb五个元素各季和各站的富集系数均大于10,人为源贡献大于自然源,是环境治理的重点元素。

Concentration and Enrichment Characteristics of Elements in PM10 of Tianjin

To understand concentration levels and source of elements in PM10,samples were collected in seven different sampling stations and concentration of 19 elements was observed in Tianjin.Results indicated that Ni,Pb,Cu and Cr were main pollutants in PM10,while elements such as K,Ca,Na,Mg,Al,Si,Fe and Ti were main contributors,with contribution rate of 92%.The enrichment factors of 19 elements were obviously lower in windy season than in nonheating season.Five elements including Co,Cu,Zn,Br and Pb with enrichment factors over 10 were affected by human activities and the important elements for pollution control.