Environmental Geochemistry and Health

, Volume 21, Issue 2, pp 157–173 | Cite as

An Investigation Into the Mechanism by Which Synthetic Zeolites Reduce Labile Metal Concentrations in Soils

  • Robert Edwards
  • Irina Rebedea
  • Nicholas W. Lepp
  • Anthony J. Lovell


The addition of synthetic zeolites and similar materials to metal contaminated soils has been shown to reduce soil phytotoxicity and to improve the quality of plant growth on such amended soils. To gain an understanding of the mechanism by which the phytotoxicity of contaminated soils is reduced when treated with synthetic zeolites, sequential extraction procedures and soil solution techniques have been used to identify changes associated with metal speciation in amended soils. Sequential extraction data and changes in soil solution composition are presented for three different contaminated soils, amended with three synthetic zeolites (P, 4A and Y) at concentrations of 0.5%, 1% and 5% w/w, or lime at 1%. The soils were collected from the site of a metal refinery, an old lead zinc mine spoil tip and from a field which had been treated with sewage sludge. After incubation of the zeolite treated soils for between one and three months, results showed a reduction in the metal content of the ammonium acetate fraction between 42% and 70%, depending on soil, zeolite and rate of addition, compared with the unamended soils. In addition, soil solution experiments indicated that synthetic zeolite amendments were more efficient at reducing metal content than comparable lime treatment. The mechanism by which synthetic zeolites reduce metal bioavailability in contaminated soils is discussed and compared to other amendments.

contaminated land in situ remediation heavy metals bioavailability zeolites 


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  1. Alloway, B.J. (ed.): 1995, Heavy Metals In Soils, 2nd edition, Chapman and Hall, London.Google Scholar
  2. Barrer, R.M. and Townsend, R.P.: 1975, Transition metal ion exchange in zeolites: Part 1. Thermodynamics of exchange of hydrated Mn2+, Co2+, Ni2+, Cu2+ and Zn2+ ions in ammonium mordenite, Journal of the Chemical Society Faraday Transactions 72, 661–673.Google Scholar
  3. Breck, D.W.: 1974, Zeolite Molecular Sieves, Wiley-Interscience, New York.Google Scholar
  4. Clevenger, T.E.: 1990. Use of sequential extraction to evaluate the heavy metals in mining wastes, Water, Air and Soil Pollution 50, 241–254.Google Scholar
  5. Coughlan, B. and Caroll, W.M.: 1976, Water in ion exchanged L, A, X and Y zeolites, Journal of the Chemical Society Faraday Transactions 72, 2016–2030.Google Scholar
  6. Dickinson, N.M., Watmough, S.A and Turner, A.P.: 1996, Ecological impact of 100 years of metal processing at Prescot, North West England, Environmental Reviews 4, 8–24.Google Scholar
  7. Grossmann, J. and Udluft, P.: 1991, The extraction of soil water by the suction-cup method, Journal of Soil Science 42, 83–93.Google Scholar
  8. Gworek, B.: 1992, Inactivation of cadmium in contaminated soils using synthetic zeolites, Environmental Pollution 75, 269–271.Google Scholar
  9. Hughes, M.K., Lepp, N.W. and Phipps, D.A.: 1980, Aerial heavy metal pollution and terrestrial ecosystems, Advances in Ecological Research 11, 218–327.Google Scholar
  10. Kabata-Pendias, A. and Pendias, H. (eds): 1992, Trace Elements in Soils and Plants, CRC Press, Boca Raton, Florida.Google Scholar
  11. Latouche, C., Dumon, J.C., Lavaux, C. and Pedemay, P.: 1993, Trace metal speciation and research in marine geochemistry, International Journal of Environmental Analytical Chemistry 51, 177–185.Google Scholar
  12. Litaor, M.I.: 1988, Review of soil solution samplers, Water Resources Research 24, 727–733.Google Scholar
  13. Loizidou, M.: 1985, Heavy metal removal using natural zeolites, Heavy Metals in the Environment 1, 649–651.Google Scholar
  14. Maes, A. and Cremers, A.: 1974. Ion exchange of synthetic zeolite X and Y with Co2+, Ni2+, Cu2+ and Zn2+ ions, Journal of the Chemical Soceity Faraday Transactions 71, 265–277.Google Scholar
  15. Mench, M., Vangronsveld, J., Didier, V.L. and Clijsters, H.: 1994a. Evaluation of metal mobility, plant availability and immobilisation by chemical agents in a limed-silty soil, Environmental Pollution, 86, 279–286.Google Scholar
  16. Mench, M., Didier, V.L., Loffler, M., Gomez, A. and Masson, P.: 1994b. A mimicked in situ remediation study of metal-contaminated soils with emphasis on cadmium and lead, Journal of Environmental Quality 23, 58–63.Google Scholar
  17. Mench, M., Vangronsveld, J., Lepp, N.W., Edwards, R, and Clijsters, H.: (in press) In situ metal immobilisation and phytostabilisation of contaminated soils, in: G. Banuelos, N. Jerry and J. Vangronsveld (eds), Phytoremediation, 5th International Conference on the Biogeochemistry of Trace Elements, Berkley, 1997.Google Scholar
  18. Rebedea, I. and Lepp, N.W.: 1995, The use of synthetic zeolites to reduce plant metal uptake and phytotoxicity in two polluted soils, Environmental Geochemistry and Health 16, 81–88.Google Scholar
  19. Rebedea, I.: 1997, An investigation into the use of synthetic zeolites for in situ contaminated land remediation, PhD Thesis, Liverpool John Moores University.Google Scholar
  20. Rebedea, I, Edwards, R, Lepp, N.W and Lovell, A.J.: 1997, An investigation into the use of synthetic zeolites for in situ land reclamation, in: Contaminated Soils, Third International conference on Biogeochemistry of Trace Elements, Paris, May 15–19, 1995 (R. Prost, ed.), D: ndatancommunicn121.PDF.Google Scholar
  21. Sanders, J.R., McGrath, S.P. and Adams, T.M.: 1987, Zinc, copper and nickel concentrations in soil extracts and crops grown on four soils treated with metal loaded sewage sludges, Environmental Pollution 44, 193–210.Google Scholar
  22. Schnitzer, M. and Skinner, S.I.M.: 1966, Organo-metallic interactions in soils: 5. Stability constants of copper, iron and zinc fulvic acid complexes, Soil Scientist 102, 361–365.Google Scholar
  23. Sposito, G.: 1993, Chemical forms of trace metals in soils, in: I. Thornton (ed.) Applied Environmental Geochemistry, Academic Press, London, pp. 123–170.Google Scholar
  24. Takenaga, H. and Aso, S.: 1975, Studies on the physiological effect of humic acid (Part 9). Stability constants of cation-nitrohumic acid chelates, Journal of Soil Science and Plant Nutrition 46, 349–354.Google Scholar
  25. Van Dijk, J.: 1971, Cation binding of humic acids, Geoderma 5, 53–67.Google Scholar
  26. Vangronsveld, J., Van Assche, F. and Clijsters, H.: 1995a, Reclamation of a bare industrial area contaminated by non-ferrous metals: in situ metal immobilisation and revegetation, Environmental Pollution 87, 51–59.Google Scholar
  27. Vangronsveld, J., Sterckx, J., Van Assche, F. and Clijsters, H.: 1995b, Rehabilitation studies on an old non-ferrous waste dumping ground: effects of revegetation and metal immobilisation by beringite, Journal of Geochemical Exploration 52, 221–229.Google Scholar
  28. Wood, P.A.: 1997, Remediation methods for contaminated sites, in: R.E. Hester and R.M. Harrison (eds), Issues in Environmental Science and Technology 7, 47–70.Google Scholar

Copyright information

© Kluwer Academic Publishers 1999

Authors and Affiliations

  • Robert Edwards
    • 1
  • Irina Rebedea
    • 1
  • Nicholas W. Lepp
    • 2
  • Anthony J. Lovell
    • 3
  1. 1.School of Pharmacy and ChemistryLiverpool John Moores UniversityLiverpoolGreat Britain
  2. 2.School of Biological and Earth ScienceLiverpool John Moores UniversityLiverpoolGreat Britain
  3. 3.Crosfield Chemicals, WarringtonCheshireGreat Britain

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