Metal Ion Leaching from Contaminated Soils: Model Development
Publication: Journal of Environmental Engineering
Volume 124, Issue 3
Abstract
A mathematical model is developed for metal leaching from contaminated soils subjected to acid extraction in a batch reactor. The model considers transport by pore diffusion and film transfer, leaching of metal bound to reversible and irreversible phases, and metal complexation by ions in solution. As currently developed, the model is semiempirical, with the primary objective of exploring the relative significance of chemical kinetics and diffusional transport under acidic leaching conditions. Simulation results and sensitivity analyses show that leaching kinetics vary according to the metal binding mechanism and location within a soil particle. The effects of pH, pore diffusion, film transfer, chemical reaction rate, particle size, and initial metal distribution are examined using parameter estimates derived from experimental data for a hazardous-waste-site soil contaminated with lead. Depending on leaching conditions, diffusion, reaction, or both may control metal leaching for timescales of interest in soil washing. Both the distribution of contaminant metal between the reversibly and irreversibly sorbed fractions and the initial spatial distribution within the soil particle are important in determining leaching behavior.
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References
1.
Annual book of ASTM standards. (1996). Soil and rock (I), 4.08 (ASTM #D 2487-93), West Conshoshocken, Pa., 214–224.
2.
Benedetti, M. F., Miline, C. J., Kinniburgh, D. G., Van Riemsdijk, W. H., and Koopal, L. K.(1995). “Metal ion binding of humic substances: application of the non-ideal competitive adsorption model.”Envir. Sci. and Technol., 29(2), 446–457.
3.
Borkovec, M., Rusch, U., Cernik, M., Koper, G. J. M., and Westall, J. C.(1996). “Affinity distributions and acid-base properties of homogeneous and heterogeneous sorbents: exact results versus experimental data inversion.”Colloids and Surfaces A: Physiochemical and Engineering Aspects, 107, 285–296.
4.
Braun, R. L., Lewis, A. E., and Wadsworth, M. E.(1974). “In-place leaching of primary sulfide ores: laboratory leaching data and kinetics model.”Metallurgical Trans., 5(8), 1717–1726.
5.
Byrne, G. D., and Hindmarsh, A. C.(1987). “Stiff ODE solvers: a review of current and coming attractions.”J. Computational Physics, 70(1), 1–62.
6.
Cabaniss, S. E., and Schuman, M. S.(1988). “Copper binding by dissolved matter: I. Suwannee River fulvic acid equilibria.”Geochimica Cosmochimica Acta, 52(1), 185–193.
7.
Cappellen, P. V., Charlet, L. Stumm, and W., and Wersin(1993). “A surface complexation model of the carbonate mineral-aqueous solution interface.”Geochimica et Cosmochimica Acta, 57(15), 3505–3518.
8.
Catts, J. G., and Langmuir, D.(1986). “Adsorption of Cu, Pb and Zn onto birnessite (δ-MnO2).”J. Appl. Geochem., 1, 255–264.
9.
Crank, J. (1975). The mathematics of diffusion, 2nd Ed., Oxford Clarendon Press, London, England.
10.
Davis, J. A., Fuller, C. C., and Cook, A. D.(1987). “A model for trace metal sorption processes at the calcite surface: adsorption of Cd2+ and subsequent solid solution formation.”Geochimica Cosmochimica Acta, 51(6), 1477–1490.
11.
Davis, J. A., and Kent, D. B. (1990). “Surface complexation modeling in aqueous geochemistry.”Mineral-water interface geochemistry, M. F. Hochella and A. F. White, ed., BookCrafters, Inc., Chelsa, Mich., 177–260.
12.
Davis, J. A., and Leckie, J. O.(1980). “Surface ionization and complexation at the oxide/water interface. III. Adsorption of anions.”J. Colloid and Interface Sci., 74(1), 32–43.
13.
Dixon, D. G., and Hendrix, J. L. (1993). “A general model for leaching of one or more solid reactants from porous ore particles.”Metallurgical Trans. B., 24B(1), 157–169.
14.
Griffin, R. A., and Burau, R. G.(1974). “Kinetics and equilibrium studies of boron desorption from soils.”Soil Sci. Soc. Am. Proc., 38(6), 892–897.
15.
Hayes, K. F., and Leckie, J. O.(1986). “Mechanism of lead ion adsorption at the goethite-water interface.”ACS Symposium Series, 323, 114–141.
16.
Hindmarsh, A. C. (1983). “ODEPACK, a systematized collection of ODE solvers.”Scientific computing, R. S. Stepleman et al., eds., West Holland, Amsterdam, The Netherlands, 55–63.
17.
Honeyman, B. D., and Leckie, J. O. (1986). “Macroscopic partitioning coefficients for metal ion adsorption: proton stoichiometry at variable pH and adsorption density.”Geochemical processes at mineral surfaces, ACS Symp. Ser. 323, J. A. Davis and K. F. Kent, eds., American Chemical Society, Washington, D.C., 162–190.
18.
Huang, C. P., and Stumm, W. J.(1973). “Specific adsorption of cation on hydrous α-Al2O3.”J. Colloid and Interface Sci., 43(2), 409–420.
19.
James, R. O., and Parks, G. A. (1975). “Adsorption of zinc(II) at the cinnabar (HgS)/(H2O) interface.”AIChE Symp. Ser. 150(71), 157–164.
20.
Jopony, M., and Young, S. D. (1987). “A constant potential titration method for studying the kinetics of desorption from soil and clay minerals.”J. of Soil Sci. 38(2), 219–226.
21.
Krupka, K. M., Erikson, R. L., Mattigod, S. V., Schramke, J. A., and Cowan, C. E. (1988). “Thermochemical data used by the FASTCHEM package.”EPRI Rep. No. EA-5872, EPRI, Palo Alto, Calif.
22.
Madsen, B. W., Wadsworth, M. E., and Grover, R. D.(1975). “Application of mixed kinetic model to the leaching of low grade copper sulfide ore.”Trans., AIME, 258(1), 69–74.
23.
Ogwada, R. A., and Sparks, D. L.(1986). “Kinetics of ion exchange on clay minerals and soils: II. Elucidation of rate-limiting steps.”Soil Sci. Soc. Am. J., 50(5), 1162–1166.
24.
Peters, E.(1991). “The mathematical modeling of leaching systems.”JOM, 43(2), 20–26.
25.
Purdue, E. M., and Lytle, C. R.(1983). “Distribution model for binding of protons and metal ions by humic substances.”Envir. Sci. and Technol., 17(11), 654–660.
26.
Roman, R. J., Benner, B. R., and Becker, G. W.(1974). “Diffusion model for heap leaching and it's application to scale up.”Trans., AIME, 256(3), 247–252.
27.
Shafer, J. L., White, M. L., and Caenepeel, C. L.(1979). “Application of the shrinking core model for copper oxide leaching.”Min. Engrg., 31(2), 165–171.
28.
Sparks, D. L. (1988). “Ion exchange kinetics on soils and soil constituents.”Kinetics of soil chemical processes, Academic Press, Inc., San Diego, Calif.
29.
Stumm, W., Huang, C. P., and Jenkins, S. R.(1970). “Specific chemical interactions affecting the stability of dispersed systems.”Croat. Chem. Acta., 42(2), 223–244.
30.
Stumm, W., and Morgan, J. J. (1995). Aquatic chemistry, 3rd Ed., John Wiley & Sons, Inc., New York, N.Y.
31.
Tipping, E., and Hurley, M. A.(1992). “A unifying model of cation binding by humic substances.”Geochimica Cosmochimica Acta, 56(10), 3627–3641.
32.
Tuin, B. J. W., and Tels, M. J.(1990). “Extraction kinetics of six heavy metals from contaminated clay soils.”Envir. Technol., London, U. K., 11(11), 541–554.
33.
Van Benschoten, J. E., Ganguly, C., and Matsumoto, M. R. (1995). “Kinetics of metal leaching from heavy metal contaminated soils.”21st Annu. RREL Res. Symp. EPA/600/R-95/012, 338–343.
34.
Van Benschoten, J. E., Matsumoto, M., and Young, W. H.(1997). “Evaluation and analysis of soil washing for seven contaminated soils.”J. Envir. Engrg., ASCE, 123(3), 217–224.
35.
Wadsworth, M. E. (1972). “Rate process in hydrometallurgy.”2nd Tutorial Symp. on Extractive Metallurgy, Univ. of Utah, Salt Lake City, Utah.
36.
Westall, J. C., Jones, J. D., Turner, G. D., and Zachara, J. M.(1995). “Models for association of metal ions with heterogeneous environmental sorbents 1. Complexation of Co(II) by Lenordite Humic Acid as a function of pH and NaClO4 concentration.”Envir. Sci. and Technol., 29(4), 951–959.
Information & Authors
Information
Published In
Journal of Environmental Engineering
Volume 124 • Issue 3 • March 1998
Pages: 278 - 287
Copyright
Copyright © 1998 American Society of Civil Engineers.
History
Published online: Mar 1, 1998
Published in print: Mar 1998
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