...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Atmospheric environment >Isotopes as tracers of sources of lead and strontium in aerosols (TSP & PM_(2.5)) in Beijing
【24h】

Isotopes as tracers of sources of lead and strontium in aerosols (TSP & PM_(2.5)) in Beijing

机译：同位素作为北京气溶胶中铅和锶的示踪剂（TSP和PM_（2.5））

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

Even after its being phased out in gasoline in the late 90s, lead (Pb) is still present at relatively high levels in the atmosphere of Beijing, China (0.10-0.18 μg m~(-3)). Its origin is subject to debate as several distinct sources may contribute to the observed pollution levels. This study proposes to constrain the origin(s) of Pb and strontium (Sr) in aerosols, by coupling both Pb and Sr isotope systematics. The characterisation of the main pollution sources (road traffic, smelters, metal refining plants, coal combustion, cement factories, and soil erosion) shows that they can unambiguously be discriminated by the multi-isotope approach (~(206)Pb/~(204)Pb and ~(87)Sr/~(86)Sr). The study of total suspended particulates (TSP) and fine particles (PM_(2.5)) from Beijing and its vicinity indicates that both size fractions are controlled by the same sources. Lead isotopes indicate that metal refining plants are the major source of atmospheric lead, followed by thermal power stations and other coal combustion processes. The role of this latter source is confirmed by the study of strontium isotopes. Occasionally, emissions from cement plants and/or input from soil alteration are isotopically detectable.
机译：即使在90年代后期逐步淘汰了汽油中的铅，铅仍以较高的含量存在于中国北京的大气中（0.10-0.18μgm〜（-3））。其来源尚有争议，因为有几种不同的来源可能会导致观测到的污染水平。这项研究建议通过系统地耦合铅和锶同位素来限制气溶胶中铅和锶（Sr）的来源。对主要污染源（道路交通，冶炼厂，金属精炼厂，燃煤，水泥厂和土壤侵蚀）的表征表明，可以通过多同位素方法（〜（206）Pb /〜（204）明确地区分它们Pb和〜（87）Sr /〜（86）Sr）。对北京及其附近地区的总悬浮颗粒物（TSP）和细颗粒物（PM_（2.5））的研究表明，这两个尺寸分数均受相同来源的控制。铅同位素表明，金属精炼厂是大气中铅的主要来源，其次是火力发电厂和其他煤炭燃烧过程。锶同位素的研究证实了后者的作用。有时候，水泥厂的排放和/或土壤变化的输入是同位素检测的。

著录项

  • 来源
    《Atmospheric environment》 |2010年第30期|p.3679-3687|共9页
  • 作者

    David Widory; Xiande Liu; Shuping Dong;

  • 作者单位

    BRGM MMA/ISO, 3 Avenue Claude Cuillemin, BP 6009, 45060 Orleans, Cedex 2, France;

    rnChinese Research Academy of Environmental Sciences, Anwai, Beiyuan, Dayangfang 8. Beijing 100012, PR China;

    rnNational Research Center for Environmental Analysis and Measurements, Yuhui nanlu 1, Beijing 100029, PR China;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    air pollution; lead isotopes; strontium isotopes; aerosol sources;

    机译：空气污染;铅同位素锶同位素;气溶胶源;

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