鞍山城区夏季PM<sub>2.5</sub>中碳组分污染特征及来源

王伟; 姬亚芹; 赵哲; 李金; 孙洪峰; 张静; 张诗建

doi:10.3969/j.issn.1674-991X.2015.02.014

鞍山城区夏季PM_2.5中碳组分污染特征及来源

doi: 10.3969/j.issn.1674-991X.2015.02.014

王伟^1, ,,
姬亚芹^2,3,
赵哲¹,
李金¹,
孙洪峰¹,
张静^2,3,
张诗建^2,3

1.
鞍山市环境监测中心站
2.
南开大学环境科学与工程学院
3.
国家环境保护城市空气颗粒物污染防治重点实验室

详细信息

通讯作者:
王伟 E-mail: ashjjcwangwei@163.com

中图分类号: X513
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出版历程
- 收稿日期: 2014-10-27
- 修回日期: 2014-11-04
- 刊出日期: 2015-03-20

Pollution Characteristics of Carbon Fractions in PM_2.5 and Their Sources in Urban Area of Anshan City in Summer

1.
Anshan Environmental Monitoring Center
2.
College of Environmental Science and Engineering, Nankai University
3.
State Environmental Protection Key Laboratory of Urban Ambient Air Particulate Matter Pollution Prevention and Control

More Information

Corresponding author: WANG Wei E-mail: ashjjcwangwei@163.com

摘要

摘要: 2014年7月采集鞍山市大气中PM_2.5样品，采用IMPROVE-TOR方法准确测量了样品中的8个碳组分，研究了鞍山城区夏季PM_2.5及其载带的碳组分的污染特征。鞍山市夏季PM_2.5浓度为(53.4±18.0) μg/m3。有机碳(OC)、元素碳(EC)和总碳(TC)占PM_2.5的比例分别为(11.89±3.86)%、(4.79±1.31)%和(16.68±5.02)%，表明碳是鞍山市城区夏季PM_2.5中的重要成分。PM_2.5中OC、EC浓度显著相关，R=0.715；另外，全市OC/EC的平均值为2.49±0.43，所有监测点位OC/EC的平均值均>2，表明PM_2.5中二次有机碳(SOC)对OC有贡献，从而说明OC、EC的来源相同。8个碳组分（OC1、OC2、OC3、OC4、EC1、EC2、EC3、OPC）的丰度研究显示，鞍山市城区夏季PM_2.5中碳主要来源于机动车尾气尘、道路尘和燃煤尘。
- PM_2.5 /
- 有机碳(OC) /
- 元素碳(EC)
Abstract: A study on the PM_2.5 in the urban area of Anshan city in summer and pollution characteristics of carbon fractions in PM_2.5was presented. PM_2.5 samples were collected at Anshan city in July, 2014. Thermal/Optical Carbon Analyzer (IMPROVE-TOR) was employed to detect the concentrations of eight carbon fractions in particulate samples. The results showed that the average mass concentration of PM_2.5 in Anshan in summer was (53.4±18) μg/m3. Organic Carbon(OC), Element Carbon(EC) and Total Carbon(TC) took (11.89±3.86)%, (4.79±1.31)% and (16.68±5.02)%, showing that carbon was the important component of PM_2.5 in Anshan in summer. The correlation between OC and EC was significant in PM_2.5, R=0.715. Moreover, the average of OC/EC ratios in PM_2.5 was 2.49±0.43. All the OC/EC ratios exceeded 2. This result suggested that there existed secondary organic carbon in ambient air contributing to OC. All of this showed the sources of OC and EC were the same in general. The percentage of eight carbon fractions（OC1、OC2、OC3、OC4、EC1、EC2、EC3、OPC）in PM_2.5 indicated that vehicle exhaust, road dust and coal combustion were primary sources of carbon in PM_2.5 in Anshan during summer.
- PM_2.5 /
- organic carbon(OC) /
- elemental carbon(EC)