摘要
利用中流量大气采样器对东莞市A和B两点(A:生活区,B:工业区)进行PM1、PM1-2.5采样,并分析其中F-、Cl-、NO-3、SO2-4、NH+4、Na+、K+、Ca2+、Mg2+等9种水溶性无机离子。结果显示,霾日工业区本地源对这些离子的贡献较非霾日大。二次离子SO2-4和NH+4的形成主要发生在PM1中,且其春冬季形成机制存在一定差异,其机制可能更主要受春冬季气象条件差异的影响,而不是霾日与非霾日的影响。对于颗粒物PM1,其霾日AE/CE值(0.974~1.168)要大于非霾日(0.877~1.039),霾日SO2-4和NH+4结合形态主要为NH4HSO4,而非霾日则为(NH4)2SO4;而对于PM1-2.5则相反。
Samples of PM1- 2.5 and PM1 were collected at A and B sites in Dongguan(A: living area; B: industrial area); and analysis of nine kinds of inorganic ions,including F-,Cl-,NO-3,SO2-4,NH+4,Na+,K+,Ca2+ and Mg2+,was performed.The results showed that industrial sources contributed more to these ions in haze days than in non-haze days.Second ions SO2-4 and NH+4 dominantly formed in PM1,and there were obvious distinctions between their formation mechanisms in spring and winter.And the mechanism was mainly affected by the difference of meteorological conditions in spring and winter,not by haze day.In PM1,AE/CE ratio values in haze days were higher than those in the non-haze days,and SO2-4 combined with NH+4 as NH4HSO4 in haze days,while as (NH4)2SO4 in nonhaze days; however,it was opposite in PM1- 2.5 in these terms.
出处
《环境工程》
CAS
CSCD
北大核心
2014年第S1期429-432,共4页
Environmental Engineering
基金
东莞市高等院校科研机构科技计划项目(2011108102040)
