Evaluating the effectiveness of joint emission control policies on the reduction. of ambient VOCs: Implications from observation during the 2014 APEC summit in suburban Beijing
Evaluating the effectiveness of joint emission control policies on the reduction. of ambient VOCs: Implications from observation during the 2014 APEC summit in suburban Beijing
复制标题
评估联合排放控制政策对减排的有效性。
DOI：
10.1016/j.atmosenv.2017.05.050
复制
发表时间：
2017-09-01
影响因子：
5
通讯作者：
Ge, Maofa
中科院分区：
文献类型：
--
作者：
Li, Kun;Li, Junling;Ge, Maofa
2014年秋季，利用质子转移反应-质谱（PTR-MS）技术对北京郊区亚太经合组织（APEC）峰会举办地附近的大气挥发性有机物（VOCs）进行了在线检测。在APEC峰会期间，中国政府制定了严格的排放控制政策。结果表明，北京市和沿着太行山的5个城市在第一个控制期（EC I）实施控制政策后，VOC浓度仅略有下降。然而，大多数VOCs（12种非生物源中的10种）在第二个排放控制期（EC II）期间，当控制政策在16个城市实施时，包括北京，天津，河北省8个城市和山东省6个城市。此外，甲苯和苯的比例在EC II期间下降，可能是因为排放控制政策改变了不同人为来源的比例。采用正矩阵因子分解（PMF）源解析法，分析了5个因子：（1）机动车+燃料，（2）溶剂，（3）生物质燃烧，（4）二次污染，（5）背景+长寿命污染。其中，汽车+燃料、溶剂和生物质燃烧在污染期间贡献了大部分VOCs浓度（60%-80%），受排放控制政策的影响最大。在EC II期间，车辆+燃料、溶剂、生物质燃烧和二次物种的减少均不低于50%。总体而言，当排放控制政策在华北平原（NCP）的许多城市（即EC II），北京郊区的VOC浓度显着下降。这说明跨区域的联防联控政策对有机气体组分的减少有很大的影响。本研究的结果对中国和其他国家制定有效的排放控制政策具有重要意义。(C)2017爱思唯尔有限公司版权所有
Ambient volatile organic compounds (VOCs) at a suburban Beijing site were on-line detected using proton transfer reaction-mass spectrometry (PTR-MS) during autumn of 2014, near the location of the Asia-Pacific Economic Cooperation (APEC) summit. During the APEC summit, the Chinese government enacted strict emission control policies. It was found that VOC concentrations only slightly decreased during the first emission control period (EC I), when control policies were performed in Beijing and 5 cities along the Tai-hang Mountains. However, most of the VOCs (10 out of 12 non-biogenic species) significantly decreased (more than 40%) during the second emission control period (EC II), when control policies were carried out in 16 cities including Beijing, Tianjin, 8 cities of Hebei province and 6 cities of Shandong province. Also the ratio of toluene and benzene decreased during EC II, likely because the emission control policies changed the proportions of different anthropogenic sources. Using the positive matrix factorization (PMF) source apportionment method, five factors are analyzed: (1) vehicle + fuel, (2) solvent, (3) biomass burning, (4) secondary, and (5) background + long-lived. Among them, vehicle + fuel, solvent and biomass burning contribute most of the VOCs concentrations (60%-80%) during the polluted periods and are affected most by emission control policies. During EC II, the reductions of vehicle + fuel, solvent, biomass burning and secondary species were all no less than 50%. Overall, when emission control policies were carried out in many North China Plain (NCP) cities (i.e. EC II), the VOC concentrations of suburban Beijing markedly decreased. This indicates the cross-regional joint-control policies have a large influence on reductions of organic gas species. The findings of this study have vital implications for helping formulate effective emission control policies in China and other countries. (C) 2017 Elsevier Ltd. All rights reserved.