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MERCURY ON A LANDSCAPE SCALE: BALANCING REGIONAL EXPORT WITH WILDLIFE HEALTH
Marvin-DiPasquale, M., L. Windham-Myers, J.A. Fleck, J.T. Ackerman, C. Eagles-Smith, et al. U.S. Geological Survey Open-File Report 2018-1092:1-105(2018)
A treatment approach was tested at field scale to reduce MeHg loads to the Sacramento-San Joaquin River Delta by creating open-water deep cells with a small footprint at the downstream end of wetlands to promote net demethylation of MeHg and minimize MeHg and Hg loads exiting the wetlands. The deep cells were located immediately upgradient of the wetland outflow weir and were deep enough (75-91 cm depth) to be vegetation-free. The topographic and hydrologic structure of each treatment wetland was modified to include open-water deep cells so that the removal of aqueous MeHg might be enhanced through particle settling, photo-degradation, and benthic microbial demethylation. This report discusses the results. https://pubs.er.usgs.gov/publication/ofr20181092
A treatment approach was tested at field scale to reduce MeHg loads to the Sacramento-San Joaquin River Delta by creating open-water deep cells with a small footprint at the downstream end of wetlands to promote net demethylation of MeHg and minimize MeHg and Hg loads exiting the wetlands. The deep cells were located immediately upgradient of the wetland outflow weir and were deep enough (75-91 cm depth) to be vegetation-free. The topographic and hydrologic structure of each treatment wetland was modified to include open-water deep cells so that the removal of aqueous MeHg might be enhanced through particle settling, photo-degradation, and benthic microbial demethylation. This report discusses the results. https://pubs.er.usgs.gov/publication/ofr20181092
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