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Warianty tytułu
Języki publikacji
Abstrakty
Two main kinds of migration through clays can be distinguished: advection and diffusion. The main force for advective flow is the water pressure gradient, while ionic concentration gradients drive diffusion. In compacted clays the hydraulic permeability is very low, therefore the diffusion process predominates. Clays can be considered as waste repositories. This paper shows characteristics of the diffusion process and the application of this process to modelling of waste migration in clays. Additionally, a new calculation method for the apparent diffusion coefficient using the finite-difference method is given. Experimental, values of the apparent diffusion coefficient Dapp for Poznan Clay and glacial clay are respectively 2.2_2.6 _ 10-12 m2/s and 2.6_4.4 _ 10-12 m2/s.
Słowa kluczowe
Czasopismo
Rocznik
Tom
Strony
111--118
Opis fizyczny
Bibliogr. 19 poz., rys., tab.
Twórcy
autor
- Faculty of Geology, University of Warsaw, PL-02-089 Warszawa, Al. Żwirki i Wigury 93, mieszko@geo.uw.edu.pl
Bibliografia
- 1. CHO W. J., OSCARSON D. W. and HAHN P. S. (1993) - The measurement of apparent diffusion coefficients in compacted clays: an assessment of methods. Applied Clay Science, 8: 283-294.
- 2. CRANK J. (1979) - The mathematics of diffusion. Calderon Press. Oxford.
- 3. CROOKS V. E. and QUIGLEY R. M. (1984) - Saline leachate through clay: a comparative laboratory and field investigation. Canadian Geotech. J., 21:349-362.
- 4. FARLOW S. J. (1982) - Partial differential equations for scientists and engineers. J. Wiley and Sons, Inc. London.
- 5. KABATA-PENDIAS A. and PENDIAS H. (1993) - Biogeochemia pierwiastków śladowych. PWN. Warszawa.
- 6. KEMPER W. D., MAASLAND D. E. L. and PORTER L. K. (1964) -Mobility of water adjacent to mineral surfaces. Proc. Soil Sc. Soc. Amer., 28 (2): 164-167.
- 7. KULESZA-WIEWIÓRA K. (1990) - Badanie składu mineralnego metodą rentgenostrukturalną. In: Metody badań gruntów spoistych. (red. B. Grabowska-Olszewska). Wyd. Geol. Warszawa.
- 8. LAI T. M. and MORTLAND M. M. (1960) - Self diffusion of exchangeable cations in bentonite. 9th Nat. Conf. Clays and Clay Miner.: 229-247.
- 9. LAI T. M. and MORTLAND M. M. (1961) - Diffusion of ions in bentonite and vermiculite. Soil Sc. Soc. Am. Proc., 35: 353-357.
- 10. LEITE A. L., PARAGUASSU A. B. and ZUQUETTE L. V. (1998) - K+ and Cl- diffusion in compacted tropical soils: a liner usage perspective: 2505-2512. 8th Inter. IAEG Congres. A. A. Balkema. Roterdam.
- 11. NEY P. H. (1979) - Diffusion of ions and uncharged solutes in soils and soil clays. Advances in Agronomy, 31: 225-272.
- 12. OLSEN S. R. and KEMPER W. D. (1968) - Movement of nutrients to plant roots. Advances in Agronomy, 20: 91-151.
- 13. ROEHL K. E. and CZURDAK. (1998) - Diffusion and solid speciation of Cd and Pb in clay liners. Applied Clay Science, 12: 387-402.
- 14. SHACKELFORD CH. and DANIEL D. E. (1991a) - Diffusion in saturated soil. Background, I. J. Geotech. Engin., 117: 467-481.
- 15. SHACKELFORD CH. and DANIEL D. E. (19916) - Diffusion in saturated soil. Results for compacted clay, II. J. Geotech. Engin., 117: 485-506.
- 16. SHACKELFORD CH. (1993) - Contaminant transport. In: Geotechnical Practice for Waste Disposal (ed. D. E. Daniel): 33-65. Chapman and Hall. London.
- 17. TESSIER A. CAMPBELL P. G. C. and BISSON M. (1979) - Sequential extraction procedure for the speciation of particulate trace metals. Anal. Chem., 51 (7): 844-851.
- 18. WITCZAK S. (1984) - Ocena laboratoryjnych metod określania parametrów migracji zanieczyszczeń. Mat. Sympozjum "Metody badania wód podziemnych, ich użytkowania i ochrona", Tuczno, 8-10 maja 1984: 156-171. Inst. Geol. Centr. Arch. Geol. Warszawa.
- 19. WYRWICKI R. (1996) - Analiza derywatograficzna. In: Metodyka badań kopalin ilastych (red. H. Kościówko and R. Wyrwicki). Państw. Inst. Geol. Warszawa-Wrocław.
Typ dokumentu
Bibliografia
Identyfikator YADDA
bwmeta1.element.baztech-article-BAT3-0014-0055