Themed collection Mercury Biogeochemistry, Exposure, and Impacts
Modern science of a legacy problem: mercury biogeochemical research after the Minamata Convention
Guest editors Heileen Hsu-Kim, Chris Eckley, and Noelle Selin introduce the Mercury Biogeochemistry, Exposure, and Impacts themed issue of Environmental Science: Processes & Impacts.
Characterization of manganese oxide amendments for in situ remediation of mercury-contaminated sediments
Mn(IV)-oxide amendment experiments with mercury-contaminated sediments demonstrate mineral redox buffering by mixed-valent (Mn, Fe)(III, II) oxides to limit mercury methylation.
Manganese(IV) oxide amendments reduce methylmercury concentrations in sediment porewater
Manganese(IV) oxide amendments reduce methylmercury concentrations in sediment by poising redox to inhibit sulfate reduction.
Mining legacy across a wetland landscape: high mercury in Upper Peninsula (Michigan) rivers, lakes, and fish
A geographic enigma is that atmospheric deposition of mercury is low and declining in the Upper Peninsula although total mercury (THg) and (MeHg) levels are high in waters and fish.
Microbial community structure with trends in methylation gene diversity and abundance in mercury-contaminated rice paddy soils in Guizhou, China
Sulfate-reducing bacteria and methanogens are the primary Hg-methylators in Chinese rice paddies.
Hg isotopes reveal in-stream processing and legacy inputs in East Fork Poplar Creek, Oak Ridge, Tennessee, USA
Reduction processes and inputs of hyporheic pore water influence Hg cycling and flux in Hg-contaminated headwater stream.
The precipitation, growth and stability of mercury sulfide nanoparticles formed in the presence of marine dissolved organic matter
Coastal and oceanic DOM formed stable mercury sulfide nanoparticle solutions but smaller sized particles were obtained when coastal DOM was used.
Mercury behaviour and C, N, and P biogeochemical cycles during ecological restoration processes of old mining sites in French Guiana
Restoration processes affect positively microbial activities and decrease mercury mobility.
Evidence of transboundary mercury and other pollutants in the Puyango-Tumbes River basin, Ecuador–Peru
Hg isotopic analyses show Au processing in Ecuador is source of pollution in Peru.
Distribution of mercury species and mercury isotope ratios in soils and river suspended matter of a mercury mining area
Light/heavy isotope enrichment is strongly related with Hg species. Combining Hg isotope analysis and Hg speciation allows the differentiation between Hg sources and Hg species transformation in Hg contaminated areas.
Response of mercury in an Adirondack (NY, USA) forest stream to watershed lime application
Total mercury and dissolved organic carbon concentrations increased following a lime application, while increases in methylmercury concentrations did not persist.
Mercury methylation in stormwater retention ponds at different stages in the management lifecycle
Stormwater retention ponds produce MeHg, but accumulate less than other types of small wetlands. Their mercury biogeochemistry is subtly different from that of superficially similar environments.
Emerging investigator series: methylmercury speciation and dimethylmercury production in sulfidic solutions
Experimental and computational evidence show that dimethylmercury is produced from decomposition of bis(methylmercury(II)) sulfide.
Responses of deposition and bioaccumulation in the Great Lakes region to policy and other large-scale drivers of mercury emissions
The effect of policy on fish mercury levels varies spatially, even within the Great Lakes Basin.
Emerging investigator series: the effect of wildfire on streamwater mercury and organic carbon in a forested watershed in the southeastern United States
The amount of streamwater mercury associated with suspended solids was an order of magnitude greater following a low-intensity wildfire.
About this collection
Edited by ESPI Associate Editor Helen Hsu-Kim (Duke University) and Guest Editors Chris Eckley (EPA) and Noelle Selin (MIT) this collection showcases a selection of the original research presented at the 13th International Conference on Mercury as a Global Pollutant in Providence, July 2017.