上海市淀山湖区域灰霾天大气颗粒物中碳组分的污染特征  

Characteristics of Carbonaceous Compositions in Atmospheric Particulate Matters during Haze Days in Dianshan Lake Area, Shanghai

作　　者：孙运筑 修光利[1] 段玉森[2] 伏晴艳[2] SUN Yunzhu;XIU Guangli;DUAN Yusen;FU Qingyan(State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on ChemicalProcess,Shanghai Environmental Protection Key Laboratory on Environmental Standard and Risk Management ofChemical Pollutants,School of Resources and Environmental Engineering,East China University ofScience and Technology,Shanghai 200237,China;Shanghai Environmental Monitoring Center,Shanghai 200233,China)

机构地区：[1]华东理工大学资源与环境工程学院,国家环境保护化工过程环境风险评价与控制重点实验室,上海市环境保护化学污染物环境标准和风险管理重点实验室,上海200237 [2]上海市环境监测中心,上海200233

出　　处：《华东理工大学学报（自然科学版）》2019年第3期440-448,共9页Journal of East China University of Science and Technology

基　　金：教育部博士点基金(20120074140001)

摘　　要：采集了上海市淀山湖区域 2015 年 3 月至 2016 年 2 月灰霾天大气颗粒物中 PM2.5 样品,重点分析了其中碳组分的污染特征。结果表明,PM2.5年均质量浓度为(69.01±37.05)μg/m3,数值与有机碳(OC)、元素碳(EC)和水溶性有机碳(WSOC)显著相关,相关性大小与灰霾程度有关。OC、EC的年均质量浓度分别为(4.46±3.41)μg/m3和(2.15±1.31)μg/m3,呈现冬季高、夏季低的趋势,两者显著相关,相关性大小同样与灰霾程度有关。WSOC 的年均质量浓度为(2.07±1.40)μg/m3,春季高于冬季,且灰霾天质量浓度大于非灰霾天相应值。碳组分对大气能见度的影响较大,需得到控制。PM2.5 samples were collected from March 2015 to February 2016 in Dianshan Lake area, Shanghai. The characteristics of the carbonaceous compositions in atmospheric particulates during haze days were studied. The results showed that the annual mean concentration of PM2.5 was (69.01±37.05)μg/m3, and the statistically significant correlations between PM2.5 and organic carbon (OC), elemental carbon (EC) and water-soluble organic carbon (WSOC) in haze days, respectively. The degree of the correlations was associated with the degree of haze pollution. The annual mean concentrations of OC and EC were (4.46±3.41)μg/m3 and (2.15±1.31)μg/m3, respectively. The mean concentrations of OC and EC were high in winter and low in summer. The significant correlations between EC and OC were found during haze days and the degree of the correlations was also associated with the degree of the haze pollution. OC and EC were likely from the same sources and the contribution of secondary organic carbon (SOC) couldn’t be ignored. The mean concentrations of both non-volatile organic carbon (NPVOC) and volatile organic carbon (PVOC), defined by this study, followed the trend of high in winter and low in summer. The mean concentration of NPVOC was greater than that of PVOC. The mean concentration of char-EC was much greater than that of soot-EC, which indicated that char-EC was the main composition of EC. The annual mean concentration of WSOC was (2.07±1.40)μg/m3, but the mean concentration was higher in spring than that in winter, and the mean concentration in haze days were higher than those in non-haze days. The research also indicates that carbonaceous compositions could affect the atmospheric visibility, the pollution hence caused by carbonaceous compositions should be controlled.

关 键 词：灰霾 PM2.5 有机碳(OC) 元素碳(EC) 水溶性有机碳(WSOC) 

分 类 号：X513[环境科学与工程—环境工程]