延吉市大气中多环芳烃分布特征研究

发布时间：2018-03-08 11:16

本文选题：多环芳烃　切入点：被动采样器　出处：《延边大学》2016年硕士论文　论文类型：学位论文

【摘要】：多环芳烃是一类具有致癌性和致畸性的物质。在大气中,多环芳烃的含量在痕量水平。在化石燃料以及生物质燃料不完全燃烧的过程中,会产生多环芳烃类物质。多环芳烃具有持久性、高毒性以及远距离迁移等特点。因此对于人体健康来说,环境中存在的多环芳烃是一种潜在的危险。延吉市位于中国东北地区,其采暖期长达6个月。近几年,随着经济快速发展,延吉地区的汽车数量也急剧上升。根据相关文献的报道,供暖期烧煤和汽车尾气排放是主要的大气中多环芳烃的污染源。为了调查延吉市大气中多环芳烃的污染水平,在本次研究中采用(聚氨酯,PUF)碟片型被动采样器对大气中多环芳烃进行了采样。采样活动的区域选定在延吉市市区内(11个采样点)。采样时间是从2015年3月到2016年1月。采样活动按季节总共进行了4次,每次采样期间为1-2月。结果表明,延吉市大气中16种多环芳烃的总浓度具有季节性变化特点。冬季的多环芳烃浓度高于其他季节。同时,延吉市大气中16种多环芳烃的总浓度在空间分布上存在差异。郊区采样点的浓度高于市内采样点。此外,延吉市大气中多环芳烃主要由萘和菲组成。
[Abstract]:Polycyclic aromatic hydrocarbons (PAHs) are carcinogenic and teratogenic substances. In the atmosphere, polycyclic aromatic hydrocarbons (PAHs) are present at trace levels. Polycyclic aromatic hydrocarbons (PAHs) can produce polycyclic aromatic hydrocarbons (PAHs). PAHs are persistent, highly toxic and can be transported over long distances. Therefore, for human health, the presence of PAHs in the environment is a potential hazard. Yanji City is located in northeast China. The heating period is up to six months. In recent years, with the rapid development of the economy, the number of cars in Yanji area has also risen sharply. In order to investigate the pollution level of polycyclic aromatic hydrocarbons (PAHs) in Yanji city, coal burning and automobile tail gas emissions are the main pollution sources of PAHs in the atmosphere during heating period. In this study, the PAHs in the atmosphere were sampled by using a PUF-based passive sampler. The sampling area was selected in Yanji city (11 sampling points). The sampling time was from March 2015 to 2016. January. A total of four sampling activities were conducted on a seasonal basis. The results show that the total concentrations of 16 kinds of PAHs in the atmosphere of Yanji City have seasonal variation characteristics, and the concentrations of PAHs in winter are higher than those in other seasons. The total concentration of 16 kinds of PAHs in the atmosphere of Yanji city is different in spatial distribution. The concentration of PAHs in the suburb is higher than that in the city. In addition, the PAHs in the atmosphere of Yanji city are mainly composed of naphthalene and phenanthrene.
【学位授予单位】：延边大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：X51

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