Mercury Cycling in Aquatic Systems: Sources, Fluxes, Transformations, and Influences
A special issue of Water (ISSN 2073-4441). This special issue belongs to the section "Water Quality and Contamination".
Deadline for manuscript submissions: closed (20 November 2023) | Viewed by 185
Special Issue Editor
Interests: water chemistry; soil chemistry; environmental photochemistry; environmental chemistry of mercury and chromium; environmental chemodynamics
Special Issues, Collections and Topics in MDPI journals
Special Issue Information
Dear Colleagues,
Mercury (Hg) remains a challenging, persistent, global pollutant. It is of paramount concern, especially in aquatic systems, since it is transformed into neuro-toxins such as methylated Hg, i.e., methyl mercury (CH3Hg(II)+) and dimethyl mercury ((CH3)2Hg(II)), mainly by aquatic microbes, thus entering the aquatic food chain. Hg is constantly engaging in a chemical redox cycling in waters between divalent Hg (Hg(II), the precursor to methylated Hg, and gaseous elemental Hg(Hg(0)). Hg(II) can enter aquatic systems via wet deposition (e.g., rain and snow) or runoff, while dissolved gaseous mercury (Hg(0), called DGM), can emit into the air, joining the global Hg cycle. Aquatic Hg transport and transformation thus profoundly impact regional and global Hg biogeochemical cycling. Hg's challenging and complex nature as a global pollutant has provided an ever-reviving impetus for the continuous advancement of environmental Hg research.
This Special Issue (SI) of Water on mercury intends to provide a platform to collect showcases and snapshots of the latest Hg research focused on aquatic Hg cycling in a broad spectrum embracing various perspectives, including sources, fluxes at water/air, water/soil, or water/sediment interfaces, transformations, biogeochemical cycles, Hg in fishes and aquatic birds, toxicology, risk assessment, influences on aquatic ecology or human society, environmental Hg modeling, Hg remediation, and many other pressing or persistent issues. Moreover, research on Zn and Cd in the triad of Zn-Cd-Hg of the periodic table may also be of particular interest in this SI as the research on Zn and Cd can offer engaging, inspiring insights into the Hg research from a comparative perspective.
Prof. Dr. Hong Zhang
Guest Editor
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Keywords
- algae/algal
- anthropogenic pollution
- aquatic ecology
- aquatic plants
- aquatic systems
- biogeochemical cycle
- Clean Air Act (CAA) Amendment
- coals
- coastal regions
- dissolved organic carbon/matter (DOC/DOM)
- divalent mercury
- elemental mercury
- environmental Hg modeling
- fish
- food chain/food web
- fossil fuels combustion
- Great Lakes
- Hg emission flux
- hazardous air pollutants (HAPs)
- humic substances/matter
- lakes
- mercury (Hg)
- mercury advisories
- mercury species and speciation
- mercury regulations
- mercury sources and sinks
- methyl/methylated mercury
- methylation
- Minamata disease
- neuro-toxin
- oceans
- oxidation/reduction/redox
- photochemical reactions
- polar areas/regions
- remediation
- risk assessment
- sediment
- seas
- sulfur (S)
- sunlight
- the Florida Everglades
- thiol groups
- toxicology
- wet deposition of Hg
- water
- watershed
- wetlands
