PMID: 16646478May 2, 2006Paper

Remediation of elemental mercury using in situ thermal desorption (ISTD)

Environmental Science & Technology
Anna M KunkelGary A Pope

Abstract

In situ thermal desorption (ISTD) is a soil heating method that simultaneously applies heat and vacuum to the subsurface at temperatures up to 600 degrees C. As the soil is heated, the vapor pressure of the contaminant increases allowing mass transfer to the gas phase and extraction from the soil using vacuum wells. The overall goal of this research is to assess the feasibility of using ISTD to remove elemental mercury from soils. The initial phase of research included design of a laboratory soil column apparatus and preliminary soil column experiments with surrogate nonaqueous phase liquids (perfluorocarbons) to test the apparatus and investigate the effects of air flow rate and temperature on the ISTD process. Following the preliminary experiments, a mercury off-gas treatment system was added and mercury experiments were conducted. Experiments performed using elemental mercury showed greater than 99.8% removal of the mercury from Ottawa sand. These results show that ISTD can remove mercury from soil at temperatures well below its boiling point and that perfluorodecalin can be used as a surrogate for elemental mercury in laboratory experiments. A flow and transport simulator was used to model the results from both the perfluor...Continue Reading

Citations

Nov 28, 2013·Environmental Science and Pollution Research International·Deepak Pant, Pooja Singh
Aug 16, 2015·Journal of Hazardous Materials·Chang Min ParkHoward M Liljestrand
May 15, 2012·Journal of Hazardous Materials·Jianxu WangLihai Shang
Apr 9, 2015·Environmental Science and Pollution Research International·Feng HeLiyuan Liang
Oct 7, 2014·Journal of the Air & Waste Management Association·Zeng-Yei HseuHsing-Cheng Hsi
Mar 3, 2006·Physics in Medicine and Biology·O RampadoR Ropolo
Jun 28, 2018·Environmental Science and Pollution Research International·Ting ZhaoPing Li
Nov 8, 2015·Environmental Science and Pollution Research International·María J SierraInmaculada Cañadas
Oct 23, 2019·International Journal of Environmental Research and Public Health·Huangxin ChengYi Shi
Jun 20, 2020·Environmental Science and Pollution Research International·He SunYongsheng Zhao

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