Isotope Tracing of Atmospheric Mercury Sources in an Urban Area of Northeastern France
详细信息    查看全文
  • 作者:Nicolas Estrade ; Jean Carignan ; Olivier F. X. Donard
  • 刊名:Environmental Science & Technology
  • 出版年:2010
  • 出版时间:August 15, 2010
  • 年:2010
  • 卷:44
  • 期:16
  • 页码:6062-6067
  • 全文大小:234K
  • 年卷期:v.44,no.16(August 15, 2010)
  • ISSN:1520-5851
文摘
Mercury (Hg) isotope composition was investigated in lichens over a territory of 900 km2 in the northeast of France over a period of nine years (2001−2009). The studied area was divided into four geographical areas: a rural area, a suburban area, an urban area, and an industrial area. In addition, lichens were sampled directly at the bottom of chimneys, within the industrial area. While mercury concentrations in lichens did not correlate with the sampling area, mercury isotope compositions revealed both mass dependent and mass independent fractionation globally characteristic of each geographical area. Odd isotope deficits measured in lichens were smallest in samples close to industries, with Δ199Hg of −0.15 ± 0.03 ‰, where Hg is thought to originate mainly from direct anthropogenic inputs. Samples from the rural area displayed the largest anomalies with Δ199Hg of −0.50 ± 0.03‰. Samples from the two other areas had intermediate Δ199Hg values. Mercury isotopic anomalies in lichens were interpreted to result from mixing between the atmospheric reservoir and direct anthropogenic sources. Furthermore, the combination of mass-dependent and mass independent fractionation was used to characterize the different geographical areas and discriminate the end-members (industrial, urban, and local/regional atmospheric pool) involved in the mixing of mercury sources.

© 2004-2018 中国地质图书馆版权所有 京ICP备05064691号 京公网安备11010802017129号

地址:北京市海淀区学院路29号 邮编:100083

电话:办公室:(+86 10)66554848;文献借阅、咨询服务、科技查新:66554700