SciELO - Scientific Electronic Library Online

 
vol.24 issue2A brief overview about the proteins and the processes responsible for the formation of the nativ-folded thioproteins in the pro-and eukaryotic cells17ß-Estradiol and progesterone inhibit l-type Ca2+ current of rat aorta smooth muscle cells author indexsubject indexarticles search
Home Pagealphabetic serial listing  

Services on Demand

Journal

Article

Indicators

Related links

  • Have no similar articlesSimilars in SciELO

Share


Portugaliae Electrochimica Acta

Print version ISSN 0872-1904

Port. Electrochim. Acta vol.24 no.2 Coimbra  2006

 

Electrokinetic evaluation of the buffer capacity of soils

 

F. Hernández-Luis,a,* D. Grandoso,a M. Lemus,a D. Benjumea,a

C.D. Arbelo,b D. Naranjo,c M.V. Vázquezc

aDepartamento de Química Física, Universidad de La Laguna, Tenerife, España

bDepartamento de Edafología y Geología, Universidad de La Laguna, Tenerife, España

cGrupo de Electroquímica, Instituto de Química, Facultad de Ciencias Exactas y Naturales, Universidad de Antioquia, AA. 1226, Medellín, Colombia

 

Abstract

Based on the principles of the technique of electroremediation (electrochemical decontamination), experiments were carried out with the purpose to determine the buffer capacity of two soils from the region of Antioquia, Colombia, using a new method. These studies included the analysis of variation of the conductivity and residual pH in selected soils, after application of an electric field. From the different obtained parameters a function was defined combining the values of pH in zones close to the cathodic chamber with the corresponding one to the blank. This function allows obtaining a measurement of the buffer capacity of the soils. In this case the function represents the easiness for changing the pH when the electric field is applied and therefore it would not only have agricultural utility, but also to evaluate the behaviour in the case of a electrochemical decontamination treatment. The observed variations in the function are in agreement with those obtained when acid or bases solutions are added to soils.

Keywords: lectrocharacterization, electroremediation, soils, pH, conductivity.

 

Texto disponível em PDF

Full text only in PDF format

 

Referencias

1. Soil Analysis Handbook of Reference Methods, Council, Inc. CRC Press, Florida, 1999.        [ Links ]

2. F.R. Magdoff, R.J. Bartlett, Soil Sci. Soc. Am. J. 49 (1985) 145-148.

3. R.L. Aitken, Aust. J. Soil Res. 30 (1990) 119-130.

4. C.E. Quintero, G.N. Boschetti, R.A. Benavidez, Commun. Soil. Sci. Plant. Anal. 30 (1999) 1449-1461.

5. G. Aguado-Lara, B. Etchevers, C. Hidalgo-Moreno, A. Galvis-Spínola, A. Aguirre-Gómez, Agrociencia 36 (2002) 11-21.

6. S. Chinthamreddy, K. Reddy, Journal of Soil Contamination 8 (1999) 197-216.

7. M.M. Page, C.L. Page, Journal of Environmental Engineering 128 (2002) 208-219.

8. S. Pamukcu, A.Weeks, J. Wittle, Journal of Hazardous Materials 55 (1997) 305-318.

9. R.F. Probstein, R.E. Hicks, Science 260 (1993) 498-503.

10. K. Reddy, S. Chinthamreddy, A. Al-Hamdan, Remediation (2001) 85-109.

11. K. Reddy, M. Donahue, R. Saichek, R. Sasaoca, Journal of Air Waste Managent Assoc. 99 (1999) 823-830.

12. K. Reddy, U. Parupudi, S. Devulapalli, C. Xu, Journal of Hazardous Materials 55 (1997) 135-158.

13. K. Reddy, A.B. Shirani, Geotechnical and Geological Engineering 15 (1997) 3-29.

14. K. Reddy, S. Chinthamreddy, Waste Management 19 (1999) 269-282.

15. M.V. Vázquez, D.A. Tobón, Afinidad 58 (2001) 437-441.

16. M.V. Vázquez, F. Hernández-Luis, Innovación 15 (2003) 45-51.

17. M.V. Vázquez, F. Hernández-Luis, C.D. Arbelo, D. Grandoso, Portugaliae Electrochim. Acta 22 (2004) 399-410.

18. M.V. Vázquez, F. Hernández-Luis, C.D. Arbelo, D. Grandoso, M. Lemus, Remediation 14 (2004) 105-112.

19. M.V. Vázquez, F. Hernández-Luis, C. D. Arbelo, M. Lemus, Portugaliae Electrochim. Acta 22 (2004) 387-398.

20. M.V. Vázquez, D.A. Tobón, F.L. Gutiérrez, Afinidad 59 (2002) 601–604.

21. G.W. Thomas, Exchangeable cations.“ Methods of soils analysis” Part 2. Chemical and Microbiological Properties. Agronomy Monograph no. 9 (2nd Edition) pp 159-165 A.S.A., Inc Publisher. Madison Wisconsin, USA.

 

*Corresponding author. E-mail address: ffhelu@ull.es

 

Creative Commons License All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License