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:

Worm Farming

Worm Farming

Do You Want To Learn More About Green Living That Can Save You Money? Discover How To Create A Worm Farm From Scratch! Recycling has caught on with a more people as the years go by. Well, now theres another way to recycle that may seem unconventional at first, but it can save you money down the road.

Get My Free Ebook

Post a comment