| 盘锦市秋冬季节PM2.5中碳组分特征及来源解析 |
| 摘要点击 1721 全文点击 533 投稿时间：2017-12-16 修订日期：2018-01-08 |
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| 中文关键词 盘锦市 有机碳(OC) 元素碳(EC) 二次有机碳(SOC) 来源解析 |
| 英文关键词 Panjin City organic carbon(OC) elemental carbon(EC) secondary organic carbon(SOC) source apportionment |
| 作者 | 单位 | E-mail | | 张蕾 | 南开大学环境科学与工程学院, 国家环境保护城市空气颗粒物污染防治重点实验室, 天津 300350 | 995421075@qq.com | | 姬亚芹 | 南开大学环境科学与工程学院, 国家环境保护城市空气颗粒物污染防治重点实验室, 天津 300350 | jiyaqin@nankai.edu.cn | | 张军 | 盘锦市环境保护监测站, 盘锦 124010 | | | 王士宝 | 南开大学环境科学与工程学院, 国家环境保护城市空气颗粒物污染防治重点实验室, 天津 300350 | | | 李越洋 | 南开大学环境科学与工程学院, 国家环境保护城市空气颗粒物污染防治重点实验室, 天津 300350 | | | 赵静琦 | 南开大学环境科学与工程学院, 国家环境保护城市空气颗粒物污染防治重点实验室, 天津 300350 | | | 张伟 | 南开大学环境科学与工程学院, 国家环境保护城市空气颗粒物污染防治重点实验室, 天津 300350 | |
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| 中文摘要 |
| 为研究盘锦市秋冬季节大气PM2.5中碳组分的污染特征和来源，于2016年10月和2017年1月采集盘锦市3个点位PM2.5样品，通过OC/EC比值法，EC示踪法以及主成分分析法对PM2.5中碳组分进行污染特征分析及来源解析.结果表明，盘锦市秋冬季节PM2.5浓度均超过环境空气质量标准（GB 3095-2012）二级标准，秋季OC和EC的平均浓度为10.02 μg·m-3和3.91 μg·m-3，冬季为16.04 μg·m-3和5.62 μg·m-3；采样期间秋冬季节OC/EC均大于2.0，说明各采样点位在秋冬季均可能存在二次污染，Spearman相关分析及线性拟合可知开发区OC与EC来源复杂，第二中学及文化公园OC和EC可能具有同源性；通过EC示踪法对SOC进行定量估算，得出秋季SOC浓度为7.21 μg·m-3，冬季为23.07 μg·m-3，对结果进行不确定性分析，可知秋冬季节SOC不确定性的绝对误差和相对误差均在可接受范围内；通过主成分分析得出盘锦市秋冬季节PM2.5中碳组分主要来源于煤烟尘，生物质燃烧以及机动车尾气. |
| 英文摘要 |
| In order to study the pollution characteristics and sources of carbon in Panjin City during autumn and winter, PM2.5 samples were collected at three monitoring points in October 2016 and January 2017. Pollution characteristics and sources of carbon components in PM2.5 were analyzed by the OC/EC ratio method, EC tracer method, and principal component analysis method. The results showed that the PM2.5 concentration exceeded the ambient air quality standard (GB 3095-2012) and that the average concentrations of OC and EC were 10.02 μg·m-3 and 3.91 μg·m-3 in autumn, respectively, and 16.04 μg·m-3 and 5.62 μg·m-3 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-3 and 23.07 μg·m-3 in autumn and winter, respectively. The absolute and relative errors of SOC uncertainty were 0.98 μg·m-3 and 14.00% in autumn, respectively, and 1.87 μg·m-3 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. |
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