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IMPACT OF DISSOLVED ORGANIC MATTER ON MERCURY AND METHYLMERCURY SORPTION TO ACTIVATED CARBON IN SOILS: IMPLICATIONS FOR REMEDIATION
Schwartz, G.E., J.P. Sanders, A.M. McBurney, S.S. Brown, U. Ghosh, and C.C. Gilmoura.
Environmental Science: Processes and Impacts 21:485-496(2019)

This study examined the effect of dissolved organic matter (DOM) on MeHg and Hg sorption to activated carbon (AC) using Suwannee River humic acid (SRHA) in slurry microcosms. AC significantly reduced porewater concentrations of both ambient MeHg and a fresh Me199Hg spike, and the addition of up to 60 mg/L SRHA did not reduce sorption to AC. The AC also reduced ambient Hg and 201Hg porewater concentrations, but as SRHA concentration increased, the magnitude of solid phase sorption decreased. Speciation modeling revealed that SRHA might have affected Hg distribution to the solid phase by reducing HgS precipitation. See additional information on this project in a slide presentation at https://clu-in.org/conf/tio/SRPPIR11_052019/slides/2Slide_Presentation_for_Upal_Ghosh,_Ph.D.,_University_of_Maryland_Baltimore_County.pdf.



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