无锡市分级颗粒物来源解析研究

南京大学学报(自然科学版) ›› 2016, Vol. 52 ›› Issue (6): 1001–.

无锡市分级颗粒物来源解析研究

陈璞珑1，谢晓栋1，黄满堂1，王体健1*，杜元新2，东　梅2，邹　华3

出版日期:2016-11-21 发布日期:2016-11-21
作者简介: 1.南京大学大气科学学院，南京，210023；2.无锡市环境监测中心站，无锡，214121；
3．江南大学环境与土木工程学院，无锡，214122
基金资助:
基金项目：国家重点研发计划(2016YFC0208504，2016YFC0203303)，国家重点基础研究发展计划(2014CB441203)
收稿日期：2016－08－30
*通讯联系人，Email：tjwang@nju.edu.cn

A study of chemical mass balance source apportionment of sizefractionated particulate matter in Wuxi

Chen Pulong1，Xie Xiaodong1，Huang Mantang1，Wang Tijian1*，Du Yuanxin2，Dong Mei2，Zou Hua3

Online:2016-11-21 Published:2016-11-21
About author: 1.School of Atmospheric Sciences，Nanjing University，Nanjing，210023，China；
2．Environmental Monitoring Center of Wuxi，Wuxi，214121，China；
3．Environment and Civil Engineering Institute，Jiangnan University，Wuxi，214122，China

摘要/Abstract

摘要： 在无锡市崇宁和旺庄环境监测子站，通过对分级颗粒物进行不同季节(2014年4、7、10、12月)的采样，同时对当地颗粒物主要排放源进行采样，并对受体和排放源样品浓度和化学成分进行特征分析，结合化学质量平衡(CMB)模型解析无锡市城区和工业区分级颗粒物来源，确定分级颗粒物不同排放源的贡献率．两个观测站点，PM10年均浓度分别为143.1 μg·m－3(崇宁站)、119.9 μg·m－3(旺庄站)；PM2.1平均质量浓度分别为71.9 μg·m－3(崇宁站)、65.3 μg·m－3(旺庄站)；PM1.1年平均质量浓度分别为53.7 μg·m－3(崇宁站)、49.9 μg·m－3(旺庄)．崇宁站各级颗粒物平均质量浓度均要高于旺庄站，季节差异上，颗粒物浓度在冬季明显高于其他三个季节．分级颗粒物最主要的化学成分是NO－3、SO2－4、OC、NH＋4、EC、Ca、Cl－、K、Fe、Al、Na等，通过质量重构方法后最主要的化学组分依次是颗粒态有机物(POM)、硫酸根(SO2－4)、硝酸根(NO－3)、铵根(NH＋4)、地壳元素(CM)、其它水溶性离子、元素碳(EC)和微量元素．利用CMB模型计算得到，无锡市PM10的排放源主要为二次硝酸盐(18.2%)、二次硫酸盐(17.3%)、土壤扬尘(9.0%)，PM2.1最主要的三类排放源依次是二次硝酸盐(26.4%)、二次硫酸盐(22.6%)和电厂燃煤(7.3%)，PM1.1的排放主要来自二次硝酸盐和二次硫酸盐，分别可以达到26.6%和22.5%.分级颗粒物来源解析结果可以看出，粗粒径颗粒物主要来自于扬尘类、汽车尾气和工业过程，细粒径颗粒物主要来自汽车尾气和工业过程．为了减轻无锡市颗粒物浓度水平，重点是控制燃煤、工业生产活动中大气污染物的排放，同时要加强城市建设中的扬尘和交通废气控制．

Abstract: In this study，sizefractionated particles were sampled at environmental monitor stations(Chongning and Wangzhuang stastions)in all seasons(April，July，October，December in 2014)in Wuxi.Samples of local emission sources were collected and source profiles were made.Characteristics of concentrations and chemical compositions were analyzed.A chemical mass balance(CMB)model was applied to apportion the contribution rate of different sources at urban area and industrial area.Investigations show that the concentrations of PM10，PM2.1 and PM1.1 were 143.1 μg·m－3 ，71.9 μg·m－3，and 53.7 μg·m－3 at Chongning station.The concentrations of PM0.1，PM2.1，PM1.1 were 119.9 μg·m－3，65.3 μg·m－3 ，49.9 μg·m－3 at Wangzhuang station.The average concentration at Chongning Station was higher than that at Wangzhuang Station.The average concentration in winter was higher than that in other three seasons.The dominant chemical compositions of sizefractionated particles were NO－3，SO2－4，OC，NH＋4，EC，Ca，Cl－，K，Fe，Al and Na.Through mass reconstruction method，main chemical constituents are particle organic matter(POM)，sulfate(SO2－4)，nitrate(NO－3)，ammonium(NH4 ＋)，the elements of the earth’s crust(CM)，other watersoluble ions，elemental carbon(EC)and trace elements.The results of source apportionment show that main sources of PM10 are secondary nitrate(18.2%)，secondary sulfate(17.3%)，soil dust(9.0%)．The three largest sources of PM2.1 are secondary nitrate(26.4%)，secondary sulfate(22.6%)and coal combustion(7.3%)．For PM1.1, the emissions are mainly from secondary nitrate(26.6%)and secondary sulfate(22.5%)．Dusts and primary emission of industrial activity are the main sources of coarse particles.For fine particulate matter，secondary aerosols such as secondary sulfate，secondary nitrate and secondary organic aerosols are the main sources.The findings point out that it will be necessary to control the emissions of coal combustion，industrial activity and reduce the emission of construction dust.

陈璞珑1，谢晓栋1，黄满堂1，王体健1*，杜元新2，东　梅2，邹　华3. 无锡市分级颗粒物来源解析研究[J]. 南京大学学报(自然科学版), 2016, 52(6): 1001–.

Chen Pulong1，Xie Xiaodong1，Huang Mantang1，Wang Tijian1*，Du Yuanxin2，Dong Mei2，Zou Hua3. A study of chemical mass balance source apportionment of sizefractionated particulate matter in Wuxi[J]. Journal of Nanjing University(Natural Sciences), 2016, 52(6): 1001–.

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