扬州市区大气降水特征及来源分析  

Characteristics and Source Analysis of Atmospheric Precipitation in Yangzhou City

作　　者：吴烨超 包金婷 张顶燕 Wu Yechao;Bao Jinting;Zhang Dingyan(Jiangsu Yangzhou Environmental Monitoring Center,Yangzhou 225000,China)

机构地区：[1]江苏省扬州环境监测中心,江苏扬州225000

出　　处：《皮革制作与环保科技》2024年第23期156-158,共3页Leather Manufacture and Environmental Technology

摘　　要：为了研究扬州市区的降水特征及来源,对2021年扬州市区降水样品的化学组分进行分析。研究表明,2021年扬州市区降水样品pH值的分布范围为4.67~7.18,酸雨以弱酸性为主,pH值年均值为5.79;大气降水电导率最低为7.50μS/cm,最高为70.5μS/cm,降水量加权平均值为23.98μS/cm;SO_(4)^(2-)和NO_(3)^(-)是降水中主要的阴离子,ρ(SO_(4)^(2-))和ρ(NO_(3)^(-))加权平均比值为0.8,污染类型偏向于混合型。利用富集系数法计算表明,SO_(4)^(2-)和NO_(3)^(-)的主要来源是人为输入。In order to study the characteristics and sources of precipitation in Yangzhou urban area,the chemical components of precipitation samples in Yangzhou urban area in 2021 were analyzed.The results show that the pH value of the precipitation samples in Yangzhou city in 2021 ranges from 4.67 to 7.18,acid rain is mainly weakly acidic,and the annual average pH value is 5.79.The lowest and highest values of atmospheric precipitation conductivity were 7.50μS/cm and 70.5μS/cm,and the weighted average value of precipitation was 23.98μS/cm.SO_(4)^(2-)and NO_(3)^(-)are the main anions in precipitation,and the weighted average ratio ofρ(SO_(4)^(2-))andρ(NO_(3)^(-))is 0.8.The pollution type tends to be mixed type.The enrichment coefficient method shows that the main source of SO_(4)^(2-)and NO_(3)^(-)is man-made input.

关 键 词：扬州 大气降水 离子组成 富集系数 

分 类 号：TS5[轻工技术与工程—皮革化学与工程]