lecture_19 - LECTURE 19 - CONSERVATIVE SOLUTE TRANSPORT...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
LECTURE 19 - CONSERVATIVE SOLUTE TRANSPORT 19.1 SOLUTE TRANSPORT TERMS SOLUTE - CONTAMINANT INTRODUCED INTO GROUNDWATER SYSTEM SOLVENT - GROUNDWATER IN AN AQUIFER MOLECULAR DIFFUSION - IONIC AND MOLECULAR SPECIES IN SOLUTE MOVE FROM AREAS OF HIGHER CONCENTRATION (CHEMICAL ACTIVITY) ADVECTION - SOLUTE IS CARRIED ALONG BY MOVEMENT OF GROUNDWATER DISPERSION - MECHANICAL PROCESS THAT REDUCES CONCENTRATION OF SOLUTE 19.2 MOLECULAR DIFFUSION IN SOLUTIONS - CONTROLLED BY FICK'S FIRST AND SECOND LAWS FIRST LAW: F = -D * C/ * x WHERE F = FLUX OF SOLUTE (MASS/AREA/TIME) UNDER STEADY STATE CONDITIONS C = SOLUTE CONCENTRATION
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
(MASS/VELOCITY) D = DIFFUSION COEF. (1X10 -2X10 M /S) -9 -9 2 * C/ * x = CONCENTRATION GRADIENT SECOND LAW: * C/ * t = D * C/ * x 2 2 WHERE: * C/ * t = CONCENTRATION CHANGE WITH TIME 19.3 MOLECULAR DIFFUSION IN SATURATED MATERIAL D = wD * WHERE: D = EFFECTIVE DIFFUSION COEF. * w = 0.5 - 0.01 f(TORTUOSITY, n ) e F = -D dC/dx x x * 19.4 ADVECTION v = K * h/ * l x n e WHERE: v
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 5

lecture_19 - LECTURE 19 - CONSERVATIVE SOLUTE TRANSPORT...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online