鞍山市夏冬季PM_(2.5)中碳组分化学特征及来源解析  

The characteristics and source apportionment of carbon fractions in PM_(2.5) during summer-winter period in Anshan City

作　　者：张伟[1,2] 姬亚芹[1,2] 李金[3] 孙洪峰[3] 李树立[1,2] 赵杰[1,2] 王士宝[1,2] 王伟[3] ZHANG Wei;JI Ya-qin;LI Jin;SUN Hong-feng;LI Shu-li;ZHAO Jie;WANG Shi-bao;WANG Wei(College of Environmental Science and Engineering, Nankai University, Tianjin 300071, China;State Environmental Protection Key Laboratory of Urban Ambient Air Particulate Matter Pollution Prevention and Control,Tianjin 300071, China;An-Shan Environmental Monitoring Center, Anshan 114004, China)

机构地区：[1]南开大学环境科学与工程学院,天津300071 [2]国家环境保护城市空气颗粒物污染防治重点实验室,天津300071 [3]鞍山市环境监测中心站,辽宁鞍山114004

出　　处：《中国环境科学》2017年第5期1657-1662,共6页China Environmental Science

基　　金：环保公益性行业专项项目(201409004)

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.To study the characteristics of carbon fractions in PM2.5,PM2.5samples were collected at six monitoring sites in Anshan city in July,2014and January,2015.Thermal/Optical Carbon Analyzer(IMPROVE-TOR)was employed to detect the concentrations of the EC and OC in PM2.5.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 PM2.5in summer and winter were(53.4±18.0)μg/m3and(124.9±60.1)μg/m3,respectively.The concentrations of OC and EC in PM2.5in summer were(5.44±0.84)μg/m3and(2.29±0.49)μg/m3;the concentrations of OC and EC in PM2.5in winter were(21.47±12.45)μg/m3and(4.68±1.79)μg/m3.The range of OC/EC in summer and winter were2.18~2.70和4.04~4.95,respectively.Compared with winter,there wassignificant correlation between OC and EC in summer.The SOC values in summer and winter were2.12μg/m3and11.95μg/m3.The biomass burning,coal combustion,vehicle emission and road dust contributed to OC and EC in PM2.5in Anshan city.

关 键 词：PM2.5 元素碳 有机碳 来源解析 鞍山 

分 类 号：X513[环境科学与工程—环境工程]