爱尔兰海岸夏季空气颗粒物水溶性离子粒径分布研究

被引:3
作者
黄卓尔 [1 ]
Roy M Harrison [2 ]
殷建新 [2 ]
机构
[1] 广州市环境监测中心站
[2] Division of Environmental Health and Risk Management University of Birmingham Birmingham BTTUK
关键词
海岸空气; 颗粒物; 可溶性离子; 粒径分布;
D O I
暂无
中图分类号
X513 [粒状污染物];
学科分类号
0706 ; 070602 ;
摘要
研究了爱尔兰西海岸国际海洋大气研究站夏季(2002年8月12~22日)大西洋气团颗粒物中水溶性无机离子的含量与其粒径关系。海盐成分(Cl-、SO42-、Na+、Ca2+、Mg2+、K+)含量在粗颗粒物中随粒径呈双峰分布(0.8~30μm),但Ca2+和K+受陆域源影响,在亚微米颗粒区间出现另一分布峰(0.1~0.8μm)。二次颗粒物成分在所有颗粒物中均有检出;NO3-呈广域宽带分布,其中大部分出现在海盐主峰区(0.8~8μm,存在Dp1.4μm和Dp4.4μm两种模态);nss-SO42-(非海盐硫酸根)和NH4+呈相关三峰分布(Dp 0.44μm、Dp 1.4μm和Dp 4.4μm),CH3SO3-也呈相似三峰分布(Dp 0.44μm、Dp 1.4μm和Dp 8μm),三者在亚微米颗粒区间同位出现主峰。二次颗粒物成分Dp 1.4μm模态在海岸空气颗粒物研究文献中尚少见报道。讨论了亚微米区间二次颗粒物盐类的化学形态。TSP中nss-SO42-、NO3-、NH4+和CH3SO3-的日均浓度分别为0.279、0.171、0.158和0.041μg/m3。
引用
收藏
页码:41 / 44+47 +47
页数:5
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