Analytical mass leaching model for contaminated soil and soil stabilized waste

• Published in: Ground water Vol. 35; no. 2; pp. 233 - 242
• Main Authors: Shackelford, C.D. (Colorado State University, Fort Collins, CO.), Glade, M.J
• Format: Journal Article
• Language: English
• Published: Oxford, UK Blackwell Publishing Ltd 01.03.1997; Ground Water Publishing Company
• Subjects: ARENA; BENTONITA; BENTONITE; CADMIO; CADMIUM; CENDRE VOLANTE; CINC; CONTAMINANTES; Contamination; ELIMINACION DE DESECHOS; ELIMINATION DES DECHETS; Fly ash; Geology; Leaching; Lead; LESSIVAGE DU SOL; LIXIVIACION; Mathematical models; MINERAL ARGILEUX; MINERALES DE ARCILLA; MODELE MATHEMATIQUE; MODELOS MATEMATICOS; PLOMB; PLOMO; POLLUANT; POLVO DE CENIZAS; Q1; SABLE; Soils; SOL POLLUE; SUELO CONTAMINADO; ZINC
• ISSN: 0017-467X; 1745-6584
• DOI: 10.1111/j.1745-6584.1997.tb00080.x

An analytical model for evaluating mass leaching from contaminated soil or soil stabilized waste is presented. The model is based on mass transport due to advection, dispersion, and retardation and can be used to evaluate the suitability and/or efficiency of soil washing solutions based on the results of column leaching studies. The model differs from more traditional models for column leaching studies in that the analysis is based on the cumulative mass of leachate instead of leachate concentration. A cumulative mass basis for leaching eliminates the requirement for determination of "instantaneous" effluent concentrations in the more traditional column leaching approach thereby allowing for the collection of relatively large effluent volumes. The cumulative masses of three heavy metals--Cd, Pb, and Zn--leached from two specimens of soil mixed with fly ash are analyzed with the mass leaching model to illustrate application and limitation of the model