In this work, catalysts were synthesized based on chemically modified clays through pillaring process with Al (III) and Fe (III) using commercial bentonite and acid-treated montomorillonite like KSF montmorillonite and K10 montmorillonite from Aldrich, as raw materials. The raw materials and chemically modified clays were characterized by: BET (Brunauer-Emmet-Teller) method and XRD (X-ray diffraction). Afterwards these catalysts were tested during wet oxidation with peroxides using phenol as target compound. Experimental results show that chemically modified clays with Fe(III) presented a higher catalytic activity in Fenton like processes than Al-Fe clays.


catalytic oxidation, montmorillonit, phenol, pillared clay

Full Text:



Catrinescu, C., Teodosiu, C., Macoveanu, M., Miehe-Brendle, J., Le Dred, R., Catalytic wet peroxide oxidation of phenol over Fe - exchanged pillared beidellite, Water Research, vol. 37, 2003, p. 1154.

Timofeeva, M.N., Khankhasaeva, S.T, Chesalov, Y.U.A., Tsybulya, S.V, Panchenko, V.N., Dashinamzhilova, E.T.S., Synthesis of Fe, Al-pillared clays starting from the Al, Fe-polymeric precursor: Effect of synthesis parameters on textural and catalytic properties, Applied Catalysis, vol. 88, 2009, p.127.

Busca, G., Berardinelli, S., Resini, C., Arrighi, L., Technologies for the removal of phenol from fluid streams: A short review of recent developments, Journal of Hazardous Materials, vol. 160, 2008, p.265.

Carriazo, J.G., Guelou, E., Barrault, J., Tatibouet, J.M., Molina, R., Moreno, S., Catalytic wet peroxide oxidation of phenol by pillared clays containing Al-Ce-Fe, Water Research, vol. 39, 2005, p. 3891.

Platon, N., Siminiceanu, I., Nistor, I.D., Miron, N.D., Muntianu, G., Mares, A.M., Fe - pillared clay as an efficient Fenton-like heterogeneous catalyst for phenol degradation, Chemistry Magazine (Bucharest),. vol. 62, 2011, p. 676.

Aouad, A., Mandali, T., Bergaya, F., A novel method of Al-pillared montmorillonite preparation for potential industrial up-scaling, Applied Clay Science, vol. 28, 2003, p. 175.

Schoonheydt, R.A., Leeman, H., Pillaring of saponite in concentrated medium, Clay Minerals, vol. 27, 1992, p. 249-252.

Storaro, L., Lenarda, M., Puchini, V., Hydroxyl al-pillaring of concentrated suspension of smectite clays, Microporous and Mesoporous Materials, vol. 20, 1998, p. 317.

Vicente, M.A., Lambert, J., Al-Pillaring of saponite with the Al polycation using a new synthetic route. Clays and Clay Minerals, vol. 51, 2003, p.168.

Balci, S., Gőkçay, E., Pore structure and surface acidity evaluation of Fe - PILCs, Turkish Journal of Chemistry, vol. 33, 2009, p. 843.

Azzouz, A., Nistor, D., Miron, D., Ursu, A.V., Sajin, T., Monette, F., Niquette, P., Hausler, R., Assessment of acid-base strength distribution of ion-exchanged montmorillonites through NH3 and CO2-TPD measurements, Thermochimica Acta, vol. 449, 2006, p. 27.

Nistor, D., Dron, P.I., Surpateanu, G.G., Siminiceanu, I., Miron, N.D., Azzouz, A., Optimized procedure for clay pillaring with aluminum species used in depollution, Journal of Thermal Analysis and Calorimetry, vol. 84, 2006, p. 527.

Nistor, D., Dron, P.I., Surpateanu, G.G., Siminiceanu, I., Miron, N.D., Azzouz, A., Programmed thermal desorption of the properties of modified clays - Impact on pollution of the environment, Journal of Thermal Analysis and Calorimetry, vol. 76, 2004, p. 913.

Platon, N., Siminiceanu, I., Nistor, I.D., Miron, N.D., Muntianu, G., Zavada, R.M., Isopencu, G., Nistor, I.D., Preparation and characterization of new products obtained by pillaring process, Chemistry Magazine (Bucharest), vol. 62, 2011, p. 799.

Luo, M., Bowden, D., Catalytic property of Fe-Al pillared clay for Fenton oxidation of phenol by H2O2, Applied Catalysis, vol. 85, 2009, p. 201.

Romanian Government Decision 352/2005, Discharge conditions of the wastewater in the environment.

Nicolau, M., The implementation of EU environmental directives, problems and solutions (in Romanian), Finmedia, Bucharest, 2005.

Schoonheydt, R.A., Van Den Eynde, J., Tubbax, H., The Al pillaring of clays, Clays and clay Minerals, vol. 41, 1993, p. 598.

Maes, N., Vansant, E.F., Study of Fe2O3-pillared clays synthesized using the trinuclear Fe(III)-acetato complex as pillaring precursor, Microporous and Mesoporous Materials, vol. 4, 1995, p. 43.

Belver, C., Bañares-Muñoz, M.A., Vicente, M.A., Fe-saponite pillared and impregnated catalysts: I. Preparation and characterization, Applied Catalysis, vol. 50, 2004, p. 101.


  • There are currently no refbacks.