General form of the ADE:
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General form of the ADE:. sink/source term. Chemical sink/source term. Simple form of the ADE. 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

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General form of the ade

General form of the ADE:

sink/source term

Chemical sink/source term


General form of the ade

Simple form of the ADE

Uniform 1D flow; longitudinal dispersion;

sink/source term


General form of the ade

General form of the ADE:

sink/source term

Chemical sink/source term


General form of the ade

  • We will consider two types of chemical reactions

  • Sorption (adsorption & absorption)

  • 1st order irreversible reactions (radioactive decay,

  • hydrolysis, some forms of biodegradation)


General form of the ade

sorption

1st order

LEA

(Zheng & Bennett)


General form of the ade

R > 1

Sorption (or retardation)

= v/vc

Zheng & Bennett, Fig. 4.3


General form of the ade

= v/vc

Zheng & Bennett, Fig. 4.3


General form of the ade

Linear Isotherm

LEA (Local Equilibrium Assumption)

Zheng & Bennett, Fig. 4.2


General form of the ade

Linear Isotherm

from MT3DMS manual


General form of the ade

Simple form of the ADE

Retardation Factor

Uniform 1D flow; longitudinal dispersion;

sink/source term; retardation


General form of the ade

= vc

Simple form of the ADE

R = v/vc


General form of the ade

Freundlich Isotherms

Linear Isotherm

Unlimited sorption sites

Zheng & Bennett, Fig. 4.2


General form of the ade

Freundlich Isotherm


General form of the ade

Langmuir Isotherm

= maximum sorption capacity

Limited sorption sites


General form of the ade

Langmuir Isotherm


General form of the ade

fraction of organic carbon

Spitz and Moreno (1996)


General form of the ade

Spitz and Moreno ( 1996)


General form of the ade

General form of the ADE:

Chemical sink/source term


General form of the ade

linear

Zheng & Bennett


General form of the ade

  • We will consider two types of chemical reactions

  • Sorption (adsorption & absorption)

  • 1st order irreversible reactions (radioactive decay,

  • hydrolysis, some forms of biodegradation)


General form of the ade

Simple form of the ADE

1st order rate constant

= ln 2 / half life = 0.693/ t½

Uniform 1D flow; longitudinal dispersion;

sink/source term; retardation; 1st order

irreversible reaction ( is the same for the

dissolved phase and the sorbed phase)


General form of the ade

Zheng & Bennett


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