Journal
ENVIRONMENTAL SCIENCE & TECHNOLOGY
Volume 53, Issue 4, Pages 1947-1957Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.est.8b06736
Keywords
-
Categories
Funding
- National Science Foundation of China [41622305]
- Strategic Priority Research Program of Chinese Academy of Sciences
- Pan-Third Pole Environment Study for a Green Silk Road (Pan-TPE) [XDA20040502]
- CAS Light of West China program
- CAS Youth Innovation Promotion Association [2017443]
- K.C. Wong Education Foundation
Ask authors/readers for more resources
Isotopic composition of atmospheric particulate bound mercury (PBM) was obtained at four remote sites in different geographical regions of China for three to 12 month periods. Mean ( 16) Delta Hg-199(PBM) was the highest at the site in southwestern China (0.66 +/- 0.32 parts per thousand), followed by the site in northeastern China (0.36 +/- 0.34 parts per thousand), the site in the marine boundary layer of East China Sea (0.35 +/- 0.33 parts per thousand), and was the lowest at the site in northwestern China (0.27 +/- 0.22 parts per thousand). Delta Hg-199(PBM) was relatively higher in cold than warm season at the sites in northwestern and southwestern China, whereas the opposite was found at the site in northeastern China. We propose that the seasonal variations of Delta Hg-199(PBM) were influenced by the exposure of air masses to regional (e.g., anthropogenic and dust related) and long-range (e.g., anthropogenic and oceanic) sources in the preceding several days, with the former characterized by lower Delta Hg-199(PBM) and the latter characterized by more positive Delta Hg-199(PBM) due to sufficient atmospheric transformations. Modeling results from Potential Source Contribution Function suggested that domestic anthropogenic emission was the major contributor to PBM pollution at the sites in northeastern and eastern China, whereas long-range transboundary transport of PBM from South Asia played a more important role at the sites in southwestern and northwestern China.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available