珠海海洋大气中甲磺酸粒子与季节变化的相关性  

Coherence between Seasonal Variation and Methane Sulfonic Acid Particles in Marine Atmosphere of Zhuhai

作　　者：张保安[1,2] 钱公望[3] 

机构地区：[1]华南理工大学化学科学学院 [2]华南理工大学环境科学与工程学院 [3]华南理工大学制浆造纸工程国家重点实验室,广东广州510640

出　　处：《环境科学与技术》2009年第2期5-8,共4页Environmental Science & Technology

基　　金：国家自然科学基金项目(29777009;20077009);广东省自然科学基金项目(04020023)

摘　　要：文章主要利用检测单个粒子的薄膜法,探讨了中国珠海海洋大气中甲磺酸(MSA)粒子的数量浓度、粒子百分数、大小和酸性(pH值)及其一般变化规律。根据在2005年1月至2005年12月间采集的样品的分析结果表明:甲磺酸粒子在大气中的数量浓度在8.6×10-11～26.6×10-11nmol/m3之间变化,粒子百分数在11.4%～34.8%之间变化,当量直径在1.0964～1.5171μm之间变化,酸性(pH值)在1.86～2.71之间变化;甲磺酸粒子的数量浓度、粒子百分数、当量直径和pH值的变化与季节变化具有明显的相关性;甲磺酸粒子的数量浓度、占总粒子的百分数随气温的升高和海洋生物生长的旺盛而增大,在夏季达到最大值,而随着气温的降低和空气湿度的增大,甲磺酸粒子的当量直径增大、酸性增强,在春季和空气湿度较大时,其当量直径具有最大值、pH值则具有最小值;1天当中,MSA粒子的浓度在下午时达到最大,早晨最小。Thin film method was used to detect the number concentration, number percentage, size, acidity and the regular pattern of ordinary alternation of methane sulfonic acid （MSA） particles collected from marine atmosphere of Zhuhai, Guangdong Province. Results of samples collected between January 2005 and December 2005 indicated that the number concentration of MSA particles varied from 8.6×10^-11 nmol/m^3 to 26.6×10^-11nmol/m^3, number percentage of MSA particles in total particles varied from 11.4% to 34.8%, equivalent diameter varied from 1.0964um to 1.5171um and acidity varied from 1.86 to 2.71. Obvious correlation between the change of number concentration, number percentage, equivalent diameter and acidity of MSA particles and change of season was demonstrated. Number concentration, number percentage of MSA particles increased with ascending of air temperature and exuberance of marine organisms growing, which was up to the maximal value in summer. With falling of air temperature and increase of air moisture, equivalent diameter of MSA particles increased and its acidity enhanced, and when in spring and higher air moisture, equivalent diameter was up to the maximal and pH value up to its minimum. Highest MSA particle concentration appeared in the afternoon and lowest in the moming during a day.

关 键 词：薄膜法 海洋大气 甲磺酸粒子 

分 类 号：X502[环境科学与工程—环境工程]