Interaction of Nano-Clays and Cu Contaminant in Geo-Environmental Projects

Subject Areas : environmental management

Vahidreza Ouhadi ¹ , Mohammad Amiri ²

1 - Prof., Architecture and Engineering Faculty, Bu-Ali Sina University, Hamedan,
2 - Ph.D Student, Architecture and Engineering Faculty, Bu-Ali Sina University, Hamedan University

Received: 2009-01-30 Accepted : 2009-06-28 Published : 2014-05-22

Keywords: Nano-clay, Carbonate, Buffering capacity, Heavy metal contaminant,

Abstract :

The main objective to study the materials in nano scale is establishing the new classification ofmaterials and their new function which may introduce a noticeable application for them. Even thoughthere have been several researches on the process of soil-contaminant interactions, the process ofheavy metal contaminant and nano-clays have not been investigated yet. On the other hand,contamination of soils with Cu ions is very common in geo-environmental projects. The mainobjective of this research is to investigate the interaction process of Cu contaminant with nano-claysbefore and after treatment with carbonate. To achieve this objective, series of geo-environmentalexperiments were performed. These experiments included, batch equilibrium testing, buffering and pHmeasurements. The achieved results indicate that the main part of buffering capacity and contaminantretention of soil are due to the presence of carbonate in soils. According to the achieved results inbetonies, kaolinite, and four nano-clay samples the contaminant retention of soils is as follows:Betonies > Cloisite®Na+ > Kaolinite > Cloisite®30B > Cloisite®20A > Cloisite®15A.Furthermore, with increasing of carbonate content there will be a change on the order of ability ofsamples for contaminant retention. For soil samples with 8% carbonate, the Cu retention of sampleswill be according to the following order:Cloisite®Na+ > Cloisite®15A ≥ Cloisite®20A > Cloisite®30B > Bentonite

References:

1. Bradbury, M. H, Baeyens; B., (2009). "Sorption modelling on illite Part I: Titration measurements and the sorption of Ni, Co, Eu and Sn", Geochimica et Cosmochimica Acta 73; pp. 990–1003.


2. Cruz-Guzmán, M., Celis, M. C. Hermosín, W. C. Koskinen, E. A. Nater and J. Cornejo., (2006). "Heavy Metal Adsorption by Montmorillonites Modified with Natural Organic Cations", Published in Soil Sci Soc Am J 70: pp. 215-221.


3. Lines, M. G., (2008). "Nanomaterials for practical functional uses", Journal of Alloys and Compounds 449, pp. 242–245.


4. Tiller, K.G., (1996). "Soil contamination issues: past, present and future, a personal perspective." In: Naidu, R., Kookana, R.S., Oliver, D.P., Rogers, S., McLaughlin, M. J. (Eds.). Contaminants and the Soil Environment in the Australasia-Pacific Region. Kluwer, Dordrecht, pp. 1–27.


5. Yong, R. N. and Phadangchewit, Y., (1993). "pH Influence on Selectivity and Retention of Heavy Metals in Some Clay Soils," Can. Geotech. J., 30, pp. 821-833.


6. Krishna B. G. and Gupta, S. S., (2008). "Adsorption of a few heavy metals on natural and modified kaolinite and montmorillonite: A review", Advances in Colloid and Interface Science 140, pp. 114–131.


7. Ouhadi, V.R., and Amiri, M., (2008). "Geo-Environmetal behaviour of nano-clays in interaction with heavy metal contaminants", Proceedings of the fourth Conference on Nano-Technology, Razi University, Kermanshah.


8.  Ouhadi. V.R., Yong. R.N., (2003). "The role of clay fractions of marly soils on their post Stabilization failure", Engineering Geology 70, pp. 365–375.


9.  Yong, R. N. and Warkentin, B. P. and Phadangchewit, Y. and Galvez, R., (1990). "Buffer capacity and lead retention in some clay minerals". Water, Air, Soil, Pollution, J., 53, pp. 53-67.


10.  Luckham, P. F. and Rossi, S., (1999). "The colloidal and rheological properties of bentonite suspensions", Adv. Colloids Interface Sci. 82, pp. 43-92.


11.  Günister, E. and İşçi, S. and Alemdar, A. and Güngör, N., (2004). "The modification of rheologic properties of clays with. PVA effect", Mater. Sci. 27, pp. 101–106.


12. Sevim, İ. and Seniha, F. G., (2005). "Investigation of rheological and colloidal properties of bentonitic clay dispersion in the presence of a cationic surfactant", Progress in Organic Coatings.  54 (1), pp. 28-33.


13. Hesse, P. R., (1971), "A textbook of soil chemical analysis", William Clowes and Sons, 519p.


14. Yong, R. N., (2000). "Geoenvironmental engineering, contaminated soils, pollutant fate and mitigation", CRC Press.


15. Handershot, W. H., and Duquette, M., (1986). "A simple barium chloride method for determining cation exchange capacity and exchangeable cations", Soil Sci. Soc. Am. J. 50, pp. 605–608.