成都城区PM2.5季节污染特征及来源解析

被引：147

作者：

张智胜 ^{[1
]}

陶俊 ^{[1
]}

谢绍东 ^{[2
]}

周来东 ^{[3
]}

宋丹林 ^{[3
]}

张普 ^{[3
]}

曹军骥 ^{[4
]}

罗磊 ^{[5
]}

机构：

[1] 环境保护部华南环境科学研究所

[2] 北京大学环境科学与工程学院

[3] 成都市环境保护科学研究院

[4] 中国科学院地球环境研究所

[5] 中国气象局成都高原气象研究所

来源：

环境科学学报 | 2013年 / 33卷 / 11期

关键词：

成都; PM2.5; 碳气溶胶; 水溶性无机离子; 源解析;

D O I：

10.13671/j.hjkxxb.2013.11.014

中图分类号：

X513 [粒状污染物];

学科分类号：

0706 ; 070602 ;

摘要：

于2009—2010年各季节典型月在成都城区采集了大气PM2.5样品,对PM2.5的质量浓度及其主要化学成分(含碳组分、水溶性无机离子和元素)进行了测定.结果显示:成都城区PM2.5平均质量浓度高达(165.1±85.1)μg·m-3,是国家环境空气质量标准年均PM2.5限值的4.7倍.OC、EC和水溶性二次离子(SO2-4,NO-3和NH+4)的平均浓度分别为(22.6±10.2)μg·m-3,(9.0±5.4)μg·m-3和(62.8±44.3)μg·m-3,分别占PM2.5浓度的13.7%、5.5%和38.0%.PM2.5及其主要化学成分浓度季节特征明显,即秋冬季高于春夏季.利用正交矩阵因子分析(PMF)对成都城区PM2.5的来源进行解析,结果表明,土壤尘及扬尘、生物质燃烧、机动车源和二次硝酸盐/硫酸盐的贡献率分别为14.3%、28.0%、24.0%和31.3%.就季节变化而言,生物质燃烧源贡献率在四个季节均维持在较高水平;土壤尘及扬尘的贡献率在春季显著提高;机动车源的贡献率在夏季中表现突出;而二次硝酸盐/硫酸盐的贡献率在秋冬季中则最为显著.

引用

页码：2947 / 2952

页数：6

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