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8101049 
Book/Book Chapter 
Modelling Reactive Transport of Organic Solutes in Groundwater with a Lagrangian Streamtube Approach 
Finkel, M; Liedl, R; Teutsch, G 
2007 
Wiley Blackwell 
Geochemical Processes: Conceptual Models for Reactive Transport in Soil and Groundwater. Research Report 
115-134 
English 
Spreading of organics in groundwater is modelled by a numerical streamtube approach providing a computationally efficient alternative to conventional finite difference and finite element techniques due to a decoupling of conservative transport and physicochemical processes. The streamtube model is designed as a forward modelling tool, i.e. the input data set describing groundwater flow, transport and reactions only contains parameters which may be determined by field or laboratory experiments. The model accounts for equilibrium as well as nonequilibrium retardation. Sorption/desorption kinetics are described as intra-particle diffusion of chemicals inside the grain particles of porous aquifer material which may consist of different lithological components and/or grain size fractions.The applicability of the model is demonstrated by a parameter study focusing on the remediation of a PAH contaminated site with the help of surfactants. It is found that the spreading and the removal of the contaminant (phenanthrene) are strongly affected by the grain size distribution and the surfactant concentration, respectively. © 2002 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. 
Lagrangian streamtube approach; Modelling reactive transport of organic solutes in groundwater; Reactive transport model SMART; Reactive transport of phenanthrene and Terrasurf G50