金华市城区PM2.5的质量浓度及其污染特征分析  

Analysis of the mass concentration and major contaminants characteristics of PM2.5 in Jinhua city

作　　者：何晓庆[1] 盛微[1] 王祚懿[1] 陈强[1] 盛建荣[1] 罗进斌 

机构地区：[1]金华市疾病预防控制中心,浙江金华321002

出　　处：《中国卫生检验杂志》2017年第22期3304-3306,3309,共4页Chinese Journal of Health Laboratory Technology

基　　金：浙江省科学技术厅重大科技专项重点社会发展项目(2014-C03025);金华市社会发展类研究项目(2015-3-069)

摘　　要：目的了解金华市城区PM2.5的质量浓度和主要污染特征。方法在金华市城区设置1个PM2.5采样点,2016年连续监测每月10日-16日PM2.5质量浓度,并对16种多环芳烃、12种有害元素和4种水溶性无机离子进行分析。结果2016年PM2.5日均浓度为50.6μg/m^3,超标率为16.67%,最高超标倍数为1.55倍;16种多环芳烃总和平均含量为8.57 ng/m^3,含量最高为苯并[b]荧蒽(2.56 ng/m^3);12种有害元素总和平均含量为151 ng/m^3,含量最高的为Al(44.5 ng/m^3),最低为Be(0.065 ng/m^3);4种离子总和平均含量为23.3μg/m^3,含量最高的为SO_4^(2-)(9.12μg/m^3),最低为Cl-(1.04μg/m^3);不同季节PM2.5质量浓度以及多环芳烃、有害元素和无机水溶性离子含量差异均有统计学意义(P<0.05)。结论 2016年金华市城区PM2.5污染水平较低,PM2.5质量浓度及其多环芳烃、有害元素和无机水溶性离子含量均存在明显的季节差异,秋冬季较高,夏季最低。Objective To understand the pollution level of PM2. 5 and characteristics of its major contaminants in Jinhua city.Methods A sampling point was set up in Jinhua city,and the concentrations of PM2. 5 from 10 th to 16 th per month were continuously monitored. The mass concentrations of PM2. 5,the content of 16 polycyclic aromatic hydrocarbons（ PAHs）,12 toxic elements and 4 water-soluble inorganic ions were analyzed. Results The daily average mass concentration of PM2. 5 was50. 6 μg/m3,and 16. 67% samples exceeded the national limit,with a maximum excess multiple of 1. 55. The average content of16 ∑PAHs was 8. 57 ng/m3,and the highest PAH content was benzo[b]fluoranthene（ 2. 56 ng/m3）. The average content of 12 toxic elements was 151 ng/m3,the highest content was aluminum（ 44.5 ng/m3）,and the lowest was beryllium（ 0.065 ng/m3）. The average content of 4 water-soluble inorganic ions was 23. 3 μg/m3,the highest content was SO_4（2-）（ 9. 12 μg/m3）,and the lowest was Cl-（ 1. 04 μg/m3）. The differences of the mass concentrations of PM2. 5,PAHs,toxic elements and water-soluble inorganic ions were statistically significant in different seasons（ P〈 0. 05）. Conclusion The pollution level of PM2. 5 is low in Jinhua city in 2016. PM2. 5,PAHs,water-soluble inorganic ions,and toxic elements show seasonal variations. The pollution level is higher in autumn and winter,but the lowest in summer.

关 键 词：PM2.5 质量浓度 多环芳烃 有害元素 无机水溶性离子 

分 类 号：R122[医药卫生—环境卫生学]