江阴市细颗粒物来源解析研究  

Chemical Characteristics and Source Apportionment of Fine Particles in Jiangyin

作　　者：范丽花 龚伟达 丁宏 奚海明 陈璞珑 王体健[2] 

机构地区：[1]江阴市市环境监测站,江苏江阴214200 [2]南京大学大气科学学院,江苏南京210023

出　　处：《环境科技》2017年第6期49-54,共6页Environmental Science and Technology

基　　金：国家重点研发计划(2016YFC0208504;2016YFC0203303);国家重点基础研究发展计划(2014CB441203);国家自然科学基金(91544230;41575145;41621005)

摘　　要：在江阴市采集了不同季节的细颗粒物样品,并对细颗粒物样品和排放源样品进行化学组分特征分析,结合化学质量平衡(CMB)模型解析细颗粒物来源贡献,确定细颗粒物不同排放源的贡献率。结果表明,江阴市2016年PM_(2.5)年均质量浓度为50.7μg/m^3,4个季节质量浓度分别为春季70.5μg/m^3、夏季32.4μg/m^3、秋季36.5μg/m^3、冬季63.5μg/m^3。利用CMB模型计算得到,江阴市PM_(2.5)的最主要的排放源为二次硫酸盐(18.3%)、二次硝酸盐(15.9%)、二次有机气溶胶(14.9%)、燃煤电厂(12.0%)。通过二次来源解析得到综合排放贡献为燃煤(30.7%)、工业(30.7%)、移动源(13.5%)、扬尘(12.6%)、其他来源(12.5%)。为了减轻江阴市颗粒物浓度水平,重点是对工业生产活动、燃煤中的污染物排放以及城市机动车废气的控制。In this study, fine particles were sampled at all seasons in Jiangyin. Characteristics of concentrations and chemical compositions were analyzed. Chemical mass balance（CMB） model was applied to apportion the contributions of different source emissions in Jiangyirr The results show that the annual average concentrations of PM2.5 in Jiangyin were 50.7 μg/m^3. The concentration was 70.5 μg/m^3in spring which is the highest and lowest in summer（32.4 μg/m^3）. The concentration NaS 36.5 mg/m^3 in autumn amd was 63.5 mg/m^3 in winter. The results of source apportionment using CMB model show that the main sources of PM2.5 are secondary sulfate（18.3%）, secondary nitrate（15.9%）, secondary organic aerosols （14.9%）, coal combustion power plant （12.0%）. With local emission inventory, the secondary aerosols were apportioned and the final contribution of emissions was coal combustion（30.7%）, industry（30.7%）, vehicle exhaust（13.5%）, the dust （12.6%）, and other emissions（12.5%）. In order to reduce the particulate concentration grade level, we should focus on industrial activity as well as the atmospheric pollutants in coal, at the same time in order to strengthen the control of motor vehicle exhaust in Jiangyin.

关 键 词：细颗粒物 化学质量平衡模型(CMB) 来源解析 江阴 

分 类 号：X8[环境科学与工程—环境工程]