UW-Madison GEOLOGY 727 - Lecture Notes (22 pages)

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Lecture Notes



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Lecture Notes

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Pages:
22
School:
University of Wisconsin, Madison
Course:
Geology 727 - Advanced Hydrogeology

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General form of the ADE sink source term Chemical sink source term Simple form of the ADE 2c c qscs c D 2 v x t x Uniform 1D flow longitudinal dispersion sink source term General form of the ADE sink source term Chemical sink source term We will consider two types of chemical reactions 1 Sorption adsorption absorption 2 1st order irreversible reactions radioactive decay hydrolysis some forms of biodegradation LEA sorption 1st order Zheng Bennett Sorption or retardation v vc R 1 Zheng Bennett Fig 4 3 v vc Zheng Bennett Fig 4 3 Linear Isotherm LEA Local Equilibrium Assumption Zheng Bennett Fig 4 2 Linear Isotherm from MT3DMS manual Simple form of the ADE 2c c qscs c D 2 v R x t x Retardation Factor Uniform 1D flow longitudinal dispersion sink source term retardation Simple form of the ADE D 2 c v c qscs c 2 R x R x R t vc R v vc Freundlich Isotherms Linear Isotherm Unlimited sorption sites Zheng Bennett Fig 4 2 Freundlich Isotherm Langmuir Isotherm maximum sorption capacity Limited sorption sites Langmuir Isotherm fraction of organic carbon Spitz and Moreno 1996 Spitz and Moreno 1996 General form of the ADE Chemical sink source term linear R 1 b Kd Zheng Bennett We will consider two types of chemical reactions Sorption adsorption absorption 1 2 1st order irreversible reactions radioactive decay hydrolysis some forms of biodegradation Simple form of the ADE 2c c qscs c D 2 v Rc R x t x 1st order rate constant ln 2 half life 0 693 t Uniform 1D flow longitudinal dispersion sink source term retardation 1st order irreversible reaction is the same for the dissolved phase and the sorbed phase Zheng Bennett



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