• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文学位 >Environmental chamber study on the formation of indoor secondary organic aerosols from household emissions.
【24h】

Environmental chamber study on the formation of indoor secondary organic aerosols from household emissions.

机译：环境室研究了由家庭排放物形成的室内二次有机气溶胶的形成。

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

Biogenic volatile organic compounds (BVOCs) are commonly used as solvents or odorants in household cleaning products and air fresheners. However, these BVOCs are unsaturated and very reactive, which can react rapidly with indoor oxidants such as ozone (O3) to produce secondary organic aerosols (SOAs) and secondary gaseous pollutants. These generated secondary pollutants can impose adverse effects on human health. Furthermore, the formation of indoor secondary pollutants from indoor gas-phase reactions can be influenced by environmental parameters including air exchange rate (ACH), relative humidity (RH) and temperature (T), and the co-existence of other indoor gaseous pollutants such as ammonia (NH3). Hence, in order to scientifically assess indoor air quality (IAQ) problems caused by secondary pollutants, it is important to characterize the BVOCs components in cleaning products and air fresheners popularly used in Hong Kong, and to investigate the effect such parameters have on the indoor secondary pollutants formation.;Solid-phase microextraction (SPME) coupling with gas chromatography/mass spectrometry (GC/MS) method was optimized for the determination of BVOCs in indoor environment. Parameters influencing the extraction processes, including sampling time, temperature and relative humidity were also investigated. The optimized SPME-GC/MS method was then applied for the determination of BVOCs compositions in three categories of cleaning products including floor cleaners (FC), kitchen cleaners (KC) and dishwashing detergent (DD), and air fresheners (AF). The analysis results showed that the chemical compositions and concentrations of individual BVOC varied broadly with household products in the view of their different functions and scents. The effects of ACH, T, and RH on the formation of indoor SOAs through ozonolysis of BVOCs emitted from FC samples were investigated. Oxidation-generated secondary carbonyl compounds were also quantified.;The effect of NH3 on secondary pollutants formation from ozonolysis of BVOCs emitted from cleaning products including FC, KC and DD were investigated in a large environmental chamber. Our results demonstrated that the presence of NH3 can significantly enhance SOAs formation regarding all the three categories of cleaning products. The percent yields (%) of secondary carbonyl compounds generated from ozonolysis of BVOCs emitted from the cleaning products were assessed in the presence and absence of NH3.
机译：生物挥发性有机化合物（BVOC）通常用作家用清洁产品和空气清新剂中的溶剂或增香剂。但是，这些BVOC是不饱和的，并且具有很高的反应性，可以与室内氧化剂（如臭氧（O3））迅速反应，产生二次有机气溶胶（SOA）和二次气态污染物。这些产生的二次污染物可对人体健康产生不利影响。此外，由室内气相反应形成的室内二次污染物可能会受到环境参数的影响，这些环境参数包括空气交换率（ACH），相对湿度（RH）和温度（T）以及其他室内气体污染物的共存，例如作为氨（NH3）。因此，为了科学地评估由二次污染物引起的室内空气质量（IAQ）问题，重要的是表征在香港流行的清洁产品和空气清新剂中的BVOC成分，并研究这些参数对室内的影响固相微萃取（SPME）结合气相色谱/质谱（GC / MS）方法进行了优化，用于测定室内环境中的BVOC。还研究了影响萃取过程的参数，包括采样时间，温度和相对湿度。然后将优化的SPME-GC / MS方法用于测定三种清洁产品中的BVOC成分，这些清洁产品包括地板清洁剂（FC），厨房清洁剂（KC）和洗碗清洁剂（DD）和空气清新剂（AF）。分析结果表明，鉴于家用产品的功能和气味不同，它们的化学组成和浓度在家用产品中差异很大。研究了ACH，T和RH通过臭氧分解从FC样品释放的BVOC形成的室内SOA的影响。还定量了氧化生成的仲羰基化合物。在一个大环境室内研究了NH3对从清洁产品（包括FC，KC和DD）排放的BVOC进行臭氧分解产生的次级污染物的影响。我们的结果表明，对于所有三种清洁产品，NH3的存在都可以显着增强SOA的形成。在存在和不存在NH3的情况下，评估了从清洁产品中排放的BVOC进行臭氧分解所产生的仲羰基化合物的百分收率（％）。

著录项

  • 作者

    Huang, Yu.;

  • 作者单位

    Hong Kong Polytechnic University (Hong Kong).;

  • 授予单位 Hong Kong Polytechnic University (Hong Kong).;
  • 学科 Environmental Sciences.
  • 学位 Ph.D.
  • 年度 2012
  • 页码 159 p.
  • 总页数 159
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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