Effects of natural particles on photo-reduction of divalent mercury in everglades waters

Photo-reduction of divalent mercury (Hg(II)) in waters plays an important role in the air-water exchange of Hg and biogeochemical cycle of Hg in general. As previous studies on photo-reduction of Hg(II) have mainly focused on dissolved Hg species, the effects of natural particles on photo-reduction...

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Bibliographic Details
Published in:Environmental pollution (1987) 2023-04, Vol.323, p.121327-121327, Article 121327
Main Authors: Wang, Kang, Liu, Guangliang, Cai, Yong
Format: Article
Language:English
Subjects:
Dust
Environmental Monitoring
Everglades waters
Mercury
Mercury - analysis
Natural particles
Photo-reduction
Water
Water Pollutants, Chemical - analysis
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Summary:Photo-reduction of divalent mercury (Hg(II)) in waters plays an important role in the air-water exchange of Hg and biogeochemical cycle of Hg in general. As previous studies on photo-reduction of Hg(II) have mainly focused on dissolved Hg species, the effects of natural particles on photo-reduction of Hg(II) remain largely unknown, except the presumed light attenuating effect through light absorption and scattering. Considering the prevalence of particulate Hg due to adsorption of divalent and elemental Hg species on aquatic particles that are often photochemically active, natural particles may play a more direct role in Hg photo-reduction. By using incubation experiments with Everglades waters and additions of isotopically labelled Hg(II), we studied the effects of particles on photo-reduction of Hg(II) in natural waters. The effect of natural particles on Hg(II) photo-reduction was not observed between filtered or unfiltered Everglades waters, probably because of the low particle concentrations (
ISSN:0269-7491
1873-6424
DOI:10.1016/j.envpol.2023.121327