鞍山市夏冬季PM<sub>2.5</sub>中碳组分化学特征及来源解析

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摘要

为研究鞍山市PM_2.5中碳组分的化学特征，于2014年7月和2015年1月在鞍山市建成区6个监测点位采集PM_2.5样品，并用热光碳分析仪测定了其中有机碳（OC）和元素碳（EC）的质量浓度.通过分析2个季节PM_2.5中OC和EC的化学特征、比值及其相关性，以及SOC的估算值，定性分析了鞍山市PM_2.5中碳质气溶胶的来源；利用因子分析法，进一步分析了其来源.结果表明，夏季和冬季PM_2.5的平均浓度分别为（53.4 ± 18.0）和（124.9±60.1）μg/m³.夏季PM_2.5中OC和EC的质量浓度分别为（5.44±0.84）和（2.29 ±0.49）μg/m³；冬季PM_2.5中OC和EC的质量浓度分别为（21.47±12.45）和（4.68±1.79）μg/m³.夏季和冬季各点位的OC/EC值的变动范围分别为2.18~2.70和4.04~4.95.相比冬天，夏季OC和EC的相关性较强.夏季和冬季SOC的估算值分别为2.12，11.95μg/m³.鞍山市大气PM_2.5中碳组分主要来源于生物质燃烧源、燃煤源、汽车排放和道路扬尘源.

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	张伟
	姬亚芹
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	孙洪峰
	李树立
	赵杰
	王士宝
	王伟

关键词 ： PM_2.5, 元素碳, 有机碳, 来源解析, 鞍山

Abstract：

To study the characteristics of carbon fractions in PM_2.5, PM_2.5 samples were collected at six monitoring sites in Anshan city in July, 2014 and January, 2015. Thermal/Optical Carbon Analyzer (IMPROVE-TOR) was employed to detect the concentrations of the EC and OC in PM_2.5. The source of carbonaceous aerosol was obtained by analyzing the characteristics of OC and EC, its ratio and correlation, the SOC values; its source was further obtained with factor analysis method. The results showed that the concentrations of PM_2.5 in summer and winter were (53.4±18.0)μg/m³and (124.9±60.1)μg/m³, respectively. The concentrations of OC and EC in PM_2.5 in summer were (5.44±0.84)μg/m³ and (2.29±0.49)μg/m³; the concentrations of OC and EC in PM_2.5 in winter were (21.47±12.45)μg/m³ and (4.68±1.79)μg/m³. The range of OC/EC in summer and winter were 2.18~2.70和4.04~4.95, respectively. Compared with winter, there was significant correlation between OC and EC in summer. The SOC values in summer and winter were 2.12μg/m³ and 11.95μg/m³. The biomass burning, coal combustion, vehicle emission and road dust contributed to OC and EC in PM_2.5 in Anshan city.

Key words： PM_2.5 EC OC source apportionment Anshan City

收稿日期: 2016-08-23

PACS:

X513

基金资助:

环保公益性行业专项项目（201409004）

通讯作者: 姬亚芹,副教授,jiyaqin@nankai.edu.cn E-mail: jiyaqin@nankai.edu.cn

作者简介: 张伟(1992-),女,河北衡水人,硕士研究生,主要研究方向为大气颗粒物污染控制技术.

引用本文:

张伟, 姬亚芹, 李金, 孙洪峰, 李树立, 赵杰, 王士宝, 王伟. 鞍山市夏冬季PM_2.5中碳组分化学特征及来源解析[J]. 中国环境科学, 2017, 37(5): 1657-1662. ZHANG Wei, JI Ya-qin, LI Jin, SUN Hong-feng, LI Shu-li, ZHAO Jie, WANG Shi-bao, WANG Wei. The characteristics and source apportionment of carbon fractions in PM_2.5 during summer-winter period in Anshan City. CHINA ENVIRONMENTAL SCIENCECE, 2017, 37(5): 1657-1662.

链接本文:

http://manu36.magtech.com.cn/Jweb_zghjkx/CN/ 或 http://manu36.magtech.com.cn/Jweb_zghjkx/CN/Y2017/V37/I5/1657

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