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Simulation of the redox buffer depletion rate in landfills of combustion residue waste materials
KTH, Superseded Departments, Chemical Engineering and Technology.
2001 (English)In: Water, Air and Soil Pollution, ISSN 0049-6979, E-ISSN 1573-2932, Vol. 128, no 04-mar, 223-242 p.Article in journal (Refereed) Published
Abstract [en]

Simulations have been made of the redox buffer depletion rate in landfills of combustion residue wastes. The model is based upon a one-dimensional mass balance where oxygen transport results from a combination of advective and diffusive processes. A simple, generalised representation of redox buffering properties is used where dissolved oxygen reacts in accordance with a first order rate law. Using certain simplifying assumptions, it is possible to obtain an analytical solution for the time required for complete depletion of the redox buffering capacity of landfilled solid wastes. The results indicate the overwhelming importance that the effective diffusivity of oxygen in the landfill has upon the rate of redox buffer depletion. The results also show under which conditions transport effects may be expected to dominate the leaching processes and determine an upper limit for the depletion rate.

Place, publisher, year, edition, pages
2001. Vol. 128, no 04-mar, 223-242 p.
Keyword [en]
landfill, leaching, quasi-stationary state, redox buffering, reducing capacity, simulation, solid waste, mass-transport
URN: urn:nbn:se:kth:diva-20511ISI: 000167945900003OAI: diva2:339206
QC 20100525Available from: 2010-08-10 Created: 2010-08-10Bibliographically approved

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Neretnieks, Ivars
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