## Sorption and Transport

In very turbulent systems like shallow lakes and coastal waters with extensive contact between water and sediments with a high sorption capacity, the mass transfer across the sediment-water interface can be approached by a diffusion-advection term and an equilibrium term:

where C is the element concentration in the porewater, Ce is the equilibrium concentration, K is the sorption/ desorption rate, D is the effective diffusion coefficient, U is the advective transport of pore water, and z is the depth in the sediment. The steady-state solution gives

and if the seepage is neglected (U> 10~7ms_1) the equation is reduced to

Ifwe assume a film model for diffusive transport and ifthe flux at z = o is calculated, we can derive at a mass transfer KL equation:

Was this article helpful?

You Might Start Missing Your Termites After Kickin'em Out. After All, They Have Been Your Roommates For Quite A While. Enraged With How The Termites Have Eaten Up Your Antique Furniture? Can't Wait To Have Them Exterminated Completely From The Face Of The Earth? Fret Not. We Will Tell You How To Get Rid Of Them From Your House At Least. If Not From The Face The Earth.

Get My Free Ebook

## Post a comment