| 大连市PM2.5中有机碳和元素碳的季节变化特征和来源分析研究 |
| |
| 引用本文： | 包艳英.大连市PM2.5中有机碳和元素碳的季节变化特征和来源分析研究[J].环境科学与管理,2017,42(3). |
| |
| 作者姓名： | 包艳英 |
| |
| 作者单位： | 大连市环境监测中心,辽宁 大连,116023 |
| |
| 摘 要： | 2014年1月-2014年12月期间,在大连市对PM2.5的质量浓度和含碳气溶胶进行了在线连续观测,获得了不同季节的含碳气溶胶的变化特征.观测结果显示:大连市PM2.5中有机碳(OC)和元素碳(EC)的年平均质量浓度分别为6.9 μg/m3和2.9 μg/m3,OC和EC浓度之和占PM2.5的18%,表明碳质气溶胶是大连市大气细粒子中的重要组分.OC和EC的比值表明机动车尾气、燃煤排放和船舶排放是大连市PM2.5中OC和EC的主要来源.重污染过程期间OC/EC的比值和PM2.5的变化趋势呈负相关关系可以作为判定外来污染输送的一个重要指标.
|
| 关 键 词： | PM2.5 有机碳 元素碳 大连市 |
Seasonal Characteristic and Source Analysis of Organic Carbonand Elemental Carbon in PM2.5 in Dalian |
| |
| Bao Yanying.Seasonal Characteristic and Source Analysis of Organic Carbonand Elemental Carbon in PM2.5 in Dalian[J].Environmental Science and Management,2017,42(3). |
| |
| Authors: | Bao Yanying |
| |
| Abstract: | Mass concentrations of PM2.5, organic carbon(OC)and elemental carbon(EC)have been measured continuously from January 2014 to December 2014 in Dalian to study the seasonal characteristics of carbon aerosol.The results show that the annual average concentrations of OC and EC in PM2.5 are 6.9 μg/m3 and 2.9μg/m3 respectively, accounting for 18% of PM2.5 mass concentration.Carbon aerosol is an important part of particulate matter.The OC/EC ratio shows that vehicle exhaust, coal-fired units and ship emission are the main sources of OC and EC in PM2.5 in Dalian.During the period of heavy pollution, negative correlation of OC/EC ratio and PM2.5 concentration can be regarded as an important indicator to judge the pollution is mainly caused by transportation from other areas. |
| |
| Keywords: | PM2 5 OC EC Dalian |
| 本文献已被 万方数据 等数据库收录！ |
|
