View in EDS

Atmospheric particulate mercury: Concentrations and size distributions

Saved in:
Bibliographic Details
Title: Atmospheric particulate mercury: Concentrations and size distributions
Authors: Kim, Pyung-Rae1, Han, Young-Ji1 youngji@kangwon.ac.kr, Holsen, Thomas M.2, Yi, Seung-Muk3
Source: Atmospheric Environment. Dec2012, Vol. 61, p94-102. 9p.
Subjects: Particulate matter, Atmospheric aerosols, Mercury & the environment, Particle size distribution, Oxidation, Adsorption (Chemistry), Low temperatures
Geographic Terms: China
Abstract: Abstract: In this study, the size distributions of atmospheric particulate mercury (PHg) were measured in both urban and rural areas during the summer, fall, and winter. Both PHg concentrations and the contribution of PHg to total PM aerosol were higher at the urban (PHg = 6.8 ± 6.5 pg m−3, PHg/total PM = 0.18 pg μg−1) than at the rural site (PHg = 4.6 ± 2.7 pg m−3, PHg/total PM = 0.06 pg μg−1). Based on size-distribution measurements, the fine mode was the dominant size at both sites in winter while the coarse mode became more important during summer. In winter PHg concentrations in the fine mode increased because of the effective adsorption of gaseous Hg onto the fine particles at the low temperature and increased Hg oxidation reactions in the presence of high particles concentrations. During winter elevated concentrations of total PHg were measured when the prevailing winds were northwesterly originating in China. [Copyright &y& Elsevier]
Copyright of Atmospheric Environment is the property of Pergamon Press - An Imprint of Elsevier Science and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
Description
Abstract:Abstract: In this study, the size distributions of atmospheric particulate mercury (PHg) were measured in both urban and rural areas during the summer, fall, and winter. Both PHg concentrations and the contribution of PHg to total PM aerosol were higher at the urban (PHg = 6.8 ± 6.5 pg m−3, PHg/total PM = 0.18 pg μg−1) than at the rural site (PHg = 4.6 ± 2.7 pg m−3, PHg/total PM = 0.06 pg μg−1). Based on size-distribution measurements, the fine mode was the dominant size at both sites in winter while the coarse mode became more important during summer. In winter PHg concentrations in the fine mode increased because of the effective adsorption of gaseous Hg onto the fine particles at the low temperature and increased Hg oxidation reactions in the presence of high particles concentrations. During winter elevated concentrations of total PHg were measured when the prevailing winds were northwesterly originating in China. [Copyright &y& Elsevier]
ISSN:13522310
DOI:10.1016/j.atmosenv.2012.07.014