摘要
对洛杉矶2005年1月至2015年1月的降水数据进行了分析,并通过UNMIX模型对降水中的无机离子成分进行了来源解析。结果表明,洛杉矶降水的p H均值为4.84,表现为轻度污染的弱酸性水平;降水的污染来源主要有3个,分别是二次污染源(50%)、海洋传输源(43%)、燃煤源及生物质燃烧源(7%);降水中离子解析结果与洛杉矶地区细颗粒物污染来源解析结果有较好的一致性,表明在细颗粒物化学成分缺失的情况下,降水离子可在一定程度上反应污染来源解析。
The rainfall data of Los Angles from January 2005 to January 2015 was analyzed by using UNMIX to identify the potential sources of inorganic ions. The results showed that the p H value was 4. 84,which indicated low pollution and acidity level. Source apportionment of water-soluble ions in rainwater mainly divided into three parts,secondary aerosols,with about 50%contribution to total mass,seawater spray was the second major contributor about 43% to acid rain,following biomass burning and coal-fires power plant were the least contributor around 7%. Compared to the other source apportionment of fine particle in Los Angeles,the result was reliable and once lack of chemical composition of fine particles,ion in precipitation can be characterized for analysis.
出处
《环境科学与管理》
CAS
2016年第5期150-153,共4页
Environmental Science and Management
