金华市大气PM_(2.5)及其含碳组分的污染特征  

Pollution Characteristics of PM_(2.5) and Its Carbonaceous Species in Jinhua

作　　者：周怀中 王杨君[2] 徐奔奔 冯加良[2] 汪午[2] 常毅[2] 张苗云 吴明红[2] ZHOU Huaizhong; WANG Yangjun., XU Benben; FENG Jialiang; WANG Wu; CHANG Yi; ZHANG Miaoyun; WU Minghong;(Jinhua Municipal Environmental Monitoring Station, Jinhua 321000, China; School of Environmental and Chemical Engineering, Shanghai University, Shanghai 200444, China; Yongkang Municipal Environment Protection Monitoring Centre, Yongkang 321300, China)

机构地区：[1]金华市环境监测中心站,浙江金华321000 [2]上海大学环境与化学工程学院,上海200444 [3]永康市环境保护监测站,浙江永康321300

出　　处：《环境科学与技术》2018年第10期192-197,共6页Environmental Science & Technology

基　　金：国家自然科学基金项目(21377078;41675123);金华市科技局资助项目(2013-3-001);金华市环保局资助项目(YG2014-FW673-ZFCG046)

摘　　要：该文在浙中金华市郊区(监测站)、城区(十五中)、工业区(婺城小学)进行PM_(2.5)采样分析,并采用IMPROVE-TOR方法测定了有机碳(OC)、元素碳(EC)质量浓度。结果表明,春夏秋冬四季的PM_(2.5)的平均浓度分别为73.0～100.6、41.7～51.7、72.0～95.5、90.7～112.6μg/m^3。OC浓度分别为9.25～12.65、6.89～9.46、12.54～15.80和12.40～13.77μg/m3,而EC浓度分别为2.82～4.62、1.01～1.91、1.92～3.23、3.08～4.58μg/m^3。根据后向轨迹图分析可知,金衢盆地静稳天气是形成2015年1月26日重污染的重要原因。结果表明,春冬季的OC、EC来源较相似,夏季时所有站和秋季城区站的OC、EC的来源差异性较大。夏季OC中二次有机碳的贡献率>48%,二次光化学作用是夏秋季浙中地区OC的重要来源。In order to understand pollution characteristics of PM2.5,organic carbon （OC） and elemental carbon （EC） in Jinhua, Zhejiang Province, PM2.5samples collected in urban （SWZ）, industrial （WC） and suburban （JCZ） areas in Jinhua during January, April, July and Oct. in 2015, and OC, EC were analyzed with a DRI carbon analyzer using IMPROVE-TOR protocol. The results showed that the seasonal average concentrations of PM2.5for spring, summer, autumn and winter were in range of 73.0-100.6, 41.7~51.7, 72.0-95.5, 90.7-112.6 μg/m3, respectively. Stagnated weather status in Jin-qu Basin could be the main reason of heavy PM25 pollution formation in Jinhua based on analysis of backward trajectories. The seasonal average concentrations of OC in spring, summer, autumn and winter were 9.25~12.65, 6.89-9.46, 12.54~15.80 and 12.40-13.77 μg/m3, respectively, while the EC average concentrations were 2.82~4.62, 1.01-1.91, 1.92-3.23, 3.08~4.58 μg/m3 in spring, summer, autumn and winter, respectively. Results show that sources of OC and EC were similar for both sites of JCZ and WC in autumn and all sites in winter and spring, and there were more complicate sources for all sites in summer and SWZ site in autumn. The relatively high contribution （above 48%） of SOC to OC suggested that secondary production was significant source of OC in summer and autumn in Jinhua.

关 键 词：PM2.5 有机碳 元素碳 金华 

分 类 号：X513[环境科学与工程—环境工程]