Journal
BULLETIN OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY
Volume 103, Issue 2, Pages 218-224Publisher
SPRINGER
DOI: 10.1007/s00128-019-02621-1
Keywords
Dissolved gaseous mercury; Photoreduction; Aquaculture; Lagoon; Contamination
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Funding
- Canada Foundation for Innovation [203477]
- Natural Sciences and Engineering Research Council [341960-2013]
- University of Trieste (Finanziamento di Ateneo per progetti di ricerca scientifica-FRA 2016)
- University of Trieste (Cofin MIUR 2017-Mercury dynamics in the lagoon environment)
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Dissolved gaseous mercury (DGM) production was examined in relation to ultraviolet radiation within a marine aquaculture site in the contaminated Marano and Grado Lagoon (Italy). The measured rates of DGM production relative to time elapsed (17.06 and 20.68pgh(-1), respectively) were substantially (6-20 times) higher than what has been observed in other marine Hg studies. We measured similar levels of DGM relative to dissolved total mercury (THgD) (0.84%-8.91%) at these sites in comparison to uncontaminated marine sites, however relative to other moderately-contaminated marine sites in Portugal the % DGM/THgD was high. These results suggest a substantial capacity for Hg volatilization from these highly contaminated lagoons to the atmosphere due to photoreduction mechanisms.
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