厦门大学学者库

中文论文

论文题名
福建九仙山大气PM_(10)及部分化学组成的季节变化
英文题名
Seasonal Variations in PM_(10) and Associated Chemical Species in Jiuxian Mountain in Fujian Province
作者
魏雅;林长城;胡清华;吴水平
作者单位
[魏雅] 厦门大学环境与生态学院;[吴水平] 厦门大学环境与生态学院;[林长城] 福建省气象科学研究所;[胡清华] 福建省环境监测中心站
期刊名称
环境科学
CN号
ISSN
0250-3301
出版日期
2017-10-15
卷
38
期
10
页码
4077-4083
中文关键词
九仙山; 化学组成; 季节变化; 来源分析
英文关键词
PM_(10); Jiuxian Mountain; PM_(10); chemical composition; seasonal; variation; source identification
中文摘要
于2011年3月~2012年1月期间在福建德化县九仙山气象站采集大气了PM_(10)样品,分析了九仙山大气PM_(10)中水溶性离子及二元羧酸,; 对其季节分布与来源进行了探讨。结果表明,九仙山大气PM_(10)、水溶性无机离子和有机二元羧酸的季节分布规律较为接近,都表现为春季的浓度显著高于; 其它季节,但9种二元羧酸对PM_(10)的贡献(0.51% 0.41%)显著低于水溶性离子(18.07 %; 8.73%)。其中,水溶性离子组成以NO_3~-和SO_4~(2-)的浓度为最高,其次为Na~+和NH_4~+;阴离子与阳离子当量浓度、NH_4; ~+与SO_4~(2-)当量浓度,以及NH_4~+与NO_3~-当量浓度之间都存在显著正相关关系。有机二元羧酸的组成以乙二酸的浓度为最高,占测量; 二元羧酸总量的75%左右,且随碳数增加呈逐渐递减趋势;来源特征比值(丙二酸/丁二酸、己二酸/壬二酸)、MODIS火点图及后向轨迹图显示,有机二元; 羧酸主要来自大气二次化学反应过程,生物质燃烧的直接贡献很小。
英文摘要
PM_(10) samples were collected at the top of Jiuxian Mountain in Fujian; Province from March 2011 to January 2012 and were analyzed for inorganic; water-soluble ions and dicarboxylic acids to investigate their seasonal; variations and sources. The results showed that PM_(10) and its; associated species exhibited much higher levels in the spring than those; in other seasons but the total contribution of the nine species of; dicarboxylic acids to PM_(10) (0.51% 0.41%) was significantly lower; than that of the water-soluble ions (18.07% 8.73%). The water-soluble; ions were characterized by the highest concentrations of SO_4~(2-) and; NO_3~-,followed by Na~+ and NH_4~+. Significant positive correlations; were observed between cation and anion equivalents,as well as between; NH_4~+ and SO_4~(2-) or NO_3~-equivalents. Individual dicarboxylic acid; showed a monotonically decreasing trend with increasing carbon number in; which oxalic acid accounted for approximately 75% of the total; dicarboxylic acids. Characteristic ratios of malonic acid to succinic; acid and adipic acid to azelaic acid,MODIS fire spots,and backward; trajectories showed that dicarboxylic acids mainly originated from; secondary reactions in the atmosphere and that the direct contributions; of open biomass burning to dicarboxylic acid concentrations were; negligible.
参考文献
基金
国家自然科学基金项目; 国家重点研发计划项目; 福建省自然科学基金计划资助项目

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