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Environ Sci Pollut Res Int

Title:		A reactive transport model for mercury fate in contaminated soil--sensitivity analysis
Author(s):		Leterme B; Jacques D;
Address:		"Performance Assessments, Institute for Environment, Health and Safety, Belgian Nuclear Research Centre (SCK*CEN), Boeretang 200, 2400, Mol, Belgium. bleterme@sckcen.be. Performance Assessments, Institute for Environment, Health and Safety, Belgian Nuclear Research Centre (SCK*CEN), Boeretang 200, 2400, Mol, Belgium. djacques@sckcen.be"
Journal Title:		Environ Sci Pollut Res Int
Year:		2015
Volume:		20150624
Issue:		21
Page Number:		16830 - 16842
DOI:		10.1007/s11356-015-4876-x
ISSN/ISBN:		1614-7499 (Electronic) 0944-1344 (Linking)
Abstract:		"We present a sensitivity analysis of a reactive transport model of mercury (Hg) fate in contaminated soil systems. The one-dimensional model, presented in Leterme et al. (2014), couples water flow in variably saturated conditions with Hg physico-chemical reactions. The sensitivity of Hg leaching and volatilisation to parameter uncertainty is examined using the elementary effect method. A test case is built using a hypothetical 1-m depth sandy soil and a 50-year time series of daily precipitation and evapotranspiration. Hg anthropogenic contamination is simulated in the topsoil by separately considering three different sources: cinnabar, non-aqueous phase liquid and aqueous mercuric chloride. The model sensitivity to a set of 13 input parameters is assessed, using three different model outputs (volatilized Hg, leached Hg, Hg still present in the contaminated soil horizon). Results show that dissolved organic matter (DOM) concentration in soil solution and the binding constant to DOM thiol groups are critical parameters, as well as parameters related to Hg sorption to humic and fulvic acids in solid organic matter. Initial Hg concentration is also identified as a sensitive parameter. The sensitivity analysis also brings out non-monotonic model behaviour for certain parameters"
Keywords:		"Adsorption Air Pollutants/*analysis Mercuric Chloride/analysis Mercury/*analysis Mercury Compounds/analysis *Models, Chemical Soil/*chemistry Soil Pollutants/*analysis Volatilization Water Pollutants, Chemical/*analysis Hp1 Hg Mercury Morris Reactive tran;"
Notes:		"MedlineLeterme, Bertrand Jacques, Diederik eng Research Support, Non-U.S. Gov't Germany 2015/06/24 Environ Sci Pollut Res Int. 2015 Nov; 22(21):16830-42. doi: 10.1007/s11356-015-4876-x. Epub 2015 Jun 24"