摘要
利用电子显微镜对中国广州和珠海大气中的酸性粒子进行了研究 .通过一个二级粒子撞击器将粒子分为二部分 :粗大粒子 (r>1.0μm)和微小粒子 (r≤ 1.0μm) .然后对采集在电镜膜片上的粒子进行形态分析和复合薄膜法分析 .在电镜下 ,酸性粒子可以通过卫星滴结构检出 ,粒子中的SO2 -4 可以通过同心圆环状结构检出 .观察表明 ,在广州大气中的酸性粒子主要是硫酸 ;珠海大气中的酸性粒子有硫酸和甲磺酸 .这一研究提供了直接的证据 :广东沿海地区有甲磺酸粒子存在 ,它们来自海洋生物 .
The eletron microscope has been used in studies of the nature of acidic particle from the air of Guangzhou and Zhuhai near the South China Sea.Atmospheric Particles were size_fractionated into two size ranges: coarse particles( r >1.0 μm) and fine particles( r ≤1.0 μm). Particles were impacted on electron microscope screens for morphological analysis and thin_film chemical tests.Acidic particles could be identified on the basis of their distinctive morphology.Presence of sulfate or/and nitrate in individual particles were determined with an electron microscope using multiple thin film method .Acidic particles in the air of Guangzhou were sulfuric acid particles, and those in the air of Zhuhai were sulfuric acid particles and methanesulfonic acid particles which were produced by oceanic emissions.
出处
《华南理工大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2000年第8期27-31,共5页
Journal of South China University of Technology(Natural Science Edition)
基金
广东省自然科学基金资助项目! (980 5 93)
广东省环保局和高教厅科技研究开发项目! (B2 30 2 5 6 4)
关键词
酸性粒子
大气污染
广东
酸雨
acidic particles
sulfuric acid particles
methanesulfonic acid particles
South China Sea
oceanic emissions
