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EVALUATING THERMAL TREATMENT AS A VIABLE MECHANISM FOR THE REMEDIATION OF ELEMENTAL MERCURY
Spain, T. and R. Falta. The 26th Annual David S. Snipes/Clemson Hydrogeology Symposium, April 12, 2018: Book of Abstracts, p. 47, 2018

DOE's TOUGH2/TMVOC code, developed at Lawrence Berkeley National Laboratory, was used to determine the effectiveness of thermal treatment to remediate elemental Hg. TMVOC is a 3-phase nonisothermal numerical simulator for water, gas, and VOCs in porous media. The code was used to simulate the removal of elemental Hg due to its liquid state at 25°C and relatively high vapor pressure at elevated temperatures. The overlying work was conducted as feasibility research for the maturation of thermal treatment for elemental Hg. Multiphase flow, contaminant phase change, and transport processes were investigated during Hg thermal mass transfer. Temperature, pressure, and mass injection rates were evaluated the better to constrain the thermal Hg treatment process. The study consisted of three key elements: 1) numerical simulation of 1D thermal treatment experiments outlined by Kunkel et al. 2006 for the treatment of elemental Hg; 2) development of ex situ and in situ thermal treatment simulation under varying conditions for Hg removal; and 3) a feasibility assessment of thermal treatment for the removal of elemental Hg in porous media.



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