Zhang Lei, Ji Ya-Qin, Zhang Jun, Wang Shi-Bao, Li Yue-Yang, Zhao Jing-Qi, Zhang Wei
State Environmental Protection Key Laboratory of Urban Ambient Air Particulate Matter Pollution Prevention and Control, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China.
Panjin Environmental Monitoring Center, Panjin 124010, China.
Huan Jing Ke Xue. 2018 Jul 8;39(7):3051-3056. doi: 10.13227/j.hjkx.201712118.
In order to study the pollution characteristics and sources of carbon in Panjin City during autumn and winter, PM samples were collected at three monitoring points in October 2016 and January 2017. Pollution characteristics and sources of carbon components in PM were analyzed by the OC/EC ratio method, EC tracer method, and principal component analysis method. The results showed that the PM concentration exceeded the ambient air quality standard (GB 3095-2012) and that the average concentrations of OC and EC were 10.02 μg·m and 3.91 μg·m in autumn, respectively, and 16.04 μg·m and 5.62 μg·m in winter. According to the OC/EC ratio method, the OC/EC ratios were more than 2.0 during the sampling periods, indicating that there was secondary pollution in autumn and winter. Spearman correlation analysis and linear fitting indicated that the OC and EC sources were complex in development zones and that secondary school and cultural park areas may have similar sources during autumn and winter. SOC was quantitatively estimated by the EC tracer method, with concentrations of 7.21 μg·m and 23.07 μg·m in autumn and winter, respectively. The absolute and relative errors of SOC uncertainty were 0.98 μg·m and 14.00% in autumn, respectively, and 1.87 μg·m and 8.21% in winter. Based on the method of principal component analysis, the carbon components in autumn and winter were mainly derived from coal combustion, biomass burning, and vehicle exhaust.
为研究盘锦市秋冬季节碳的污染特征及来源，于2016年10月和2017年1月在三个监测点采集了PM样本。采用OC/EC比值法、EC示踪法和主成分分析法对PM中碳组分的污染特征及来源进行了分析。结果表明，PM浓度超过了环境空气质量标准（GB 3095 - 2012），秋季OC和EC的平均浓度分别为10.02μg·m和3.91μg·m，冬季分别为16.04μg·m和5.62μg·m。根据OC/EC比值法，采样期间OC/EC比值均大于2.0，表明秋冬季节存在二次污染。Spearman相关性分析和线性拟合表明，开发区OC和EC来源复杂，中小学及文化园区在秋冬季节可能有相似来源。采用EC示踪法对SOC进行定量估算，秋季和冬季浓度分别为7.21μg·m和23.07μg·m。秋季SOC不确定度的绝对误差和相对误差分别为0.98μg·m和14.00%，冬季分别为1.87μg·m和8.21%。基于主成分分析法，秋冬季节碳组分主要来源于煤炭燃烧、生物质燃烧和机动车尾气排放。
