• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Environmental Science and Pollution Research >Impact of emissions controls on ambient carbonyls during the Asia-Pacific Economic Cooperation summit in Beijing, China
【24h】

Impact of emissions controls on ambient carbonyls during the Asia-Pacific Economic Cooperation summit in Beijing, China

机译：北京亚太经济合作峰会环境羰基对亚太经济合作峰会的影响

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Beijing and its surrounding areas implemented a series of stringent measures to ensure good air quality during the Asia-Pacific Economic Cooperation (APEC) summit. These measures included restrictions on traffic, constructions, and industrial activities. The diurnal variations of carbonyls, 24-h PM2.5, and its chemical species were investigated before, during, after APEC, and the 2015 summer. The average concentrations of carbonyls, formaldehyde, acetaldehyde, and acetone were decreased by 65.2%, 78.6%, 41.5%, and 55.6% during APEC, respectively. The concentrations of propene equivalent, the ozone formation potential, and the contribution to OH removal by carbonyls during APEC were approximately 27-33% of those during the preceding interval. The temporal variation of carbonyls during APEC was similar to that of other air pollutants, except for O-3; however, the diurnal variation of carbonyls was consistent with that of O-3, with the highest values at noon and the lowest ones at night during APEC. Large variations in C1/C2 (0.95-9.41) and C2/C3 (5.70-15.71) were observed during the sampling period. The correlations analysis, diagnostical ratios, and diurnal variations of carbonyls indicated that primary sources were not an important source and secondary formation was the dominant source of atmospheric carbonyls during the entire period. The control measures not only reduced primary carbonyl emissions but also dramatically reduced secondary carbonyl precursors, such as NOx and volatile organic compounds (VOCs), resulting in the low level of carbonyls during APEC. In addition, the potential health effects of carbonyls were evaluated and the cancer risk from formaldehyde and acetaldehyde was significantly higher before APEC than during the other intervals.
机译：北京及其周边地区实施了一系列严格的措施，以确保亚太经济合作期间的良好空气质量（APEC）峰会。这些措施包括对交通，建筑和工业活动的限制。在APEC和2015年夏季之前，之前，期间，研究了羰基，24小时PM2.5及其化学物质的昼夜变化。羰基，甲醛，乙醛和丙酮的平均浓度分别在APEC中降低了65.2％，78.6％，41.5％和55.6％。丙烯当量，臭氧形成电位的浓度和ob of在αc中的羰基的贡献率约为前面的间隔期间的羰基〜27-33％。 APEC期间羰基的时间变化与其他空气污染物相似，除O-3外;然而，羰基的昼夜变化与O-3的季节一致，中午的最高值和最低的APEC期间。在取样期间观察到C1 / C2（0.95-9.41）和C2 / C3（5.70-15.71）的大变异。羰基的相关性分析，诊断比和昼夜变化表明，主要来源不是重要的来源，二次形成是整个时期内大气羰基的主要来源。控制措施不仅减少了初级羰基排放，而且还显着减少了仲羰基前体，例如NOx和挥发性有机化合物（VOC），导致亚烷铁中的羰基含量低。此外，评估羰基的潜在健康效果，并且在亚均匀之前，甲醛和乙醛的癌症风险明显高于其他间隔。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号