Effects of acid leaching on halloysite

• Autorzy: Saklar S. , Yorukoglu A.

Identyfikatory

DOI

10.5277/ppmp150108

• Języki publikacji: EN

Abstrakty

EN

A characteristic iron-containing halloysite sample from Turkey was subjected to acid leaching using organic and inorganic acids for removing iron impurities. The aim of this study was to compare the raw hydrated and dehydrated halloysites with the leached products. Hydrochloric acid and oxalic acid were chosen as leaching agents for the removal of iron impurities at 80 °C for 2.5 h. The physicochemical properties of the acid-treated halloysite were analyzed by XRF, XRD, FTIR, TGA, DTA, SEM, and TEM. The XRF results showed that the acid treatment caused the dissolution of minor amounts of Al3+ ions from the clay layer. The XRD results indicated that the crystalline structure was unchanged after the leaching. However, it was observed that the hydrated (1 nm) halloysite readily lost its interlayer water and was transformed to the dehydrated (0.7 nm) form. In addition, no visible effects of the acid treatment on the tubular structure of halloysite were detected in the SEM and TEM images. Typical pores of varying dimensions were observed in all of the samples regardless of their form or treatment. Furthermore, the TG-DTA and FTIR analysis results were similar for both the raw and the acid-treated samples.

Słowa kluczowe

EN

halloysite; kaolin; leaching; dehydration; characterization

• Wydawca: Oficyna Wydawnicza Politechniki Wrocławskiej
• Czasopismo: Physicochemical Problems of Mineral Processing
• Rocznik: 2015
• Tom: Vol. 51, iss. 1
• Strony: 83--94
• Opis fizyczny: BIbliogr. 29 poz., rys., tab.

Twórcy

autor

Saklar S.

• General Directorate of Mineral Research and Exploration (MTA), Turkey

autor

Yorukoglu A.

• Department of Technology, Mineral Processing Division, Ankara, Turkey

Bibliografia

• 1. AMBIKADEVI V.R., LALITHAMBIKA M., 2000, Effect of organic acids on ferric iron removal from iron-stained kaolinite, Applied Clay Science, 16, 133-14.
• 2. ANTHONY J.W., BIDEAUX R.A., BLADH K.W., NICHOLS M.C., 1995, Handbook of Mineralogy, Vol. II. Silica, Silicates, Mineral Data Publishing, Tucson, Arizona.
• 3. ARSLAN V., BAYAT O., 2009, Removal of Fe from kaolin by chemical leaching and bioleaching, Clays and Clay Minerals, 57(6), 787–794.
• 4. BELKASSA K., BESSAHA F., MAROUF K., BATONNEAU I., COMPAROT J., KHELIFA A., 2013, Physicochemical and adsorptive properties of a heat-treated and acid-leached Algerian halloysite, Colloids and Surfaces A: Physicochemical and Engineering Aspects, 421, 26-33.
• 5. BOBOS I., DUPLAY J., ROCHA J., GOMES C., 2001, Kaolinite to halloysite-7 A transformation in the kaolin deposit of Sao Vicente De Pereira-Portugal, Clays and Clay Minerals, 49(6), 596-607.
• 6. CHURCHMAN G.J., CARR R.M., 1975, The definition and nomenclature of halloysites, Clays and Clay Minerals, 23, 382-388.
• 7. CHURCHMAN G.J., DAVY T.J., AYLMORE L.A.G., GILKES R.J., SELF P.G., 1995, Characteristics of fine pores in some halloysites, Clay Minerals, 30, 89–98.
• 8. CHURCHMAN G.J., WHITTON J.S., CLARIDGE G.G.C., THENG B.K.G., 1984, Intercalation method using formamide for differentiating halloysite from kaolinite. Clays and Clay Minerals, 32, 241–248.
• 9. ECE Ö.İ., SCHROEDER P.A., 2007, Clay mineralogy and chemistry of halloysite and alunite deposits in the Turplu area-Balıkesir-Turkey, Clays and Clay Minerals, 55(1), 18-35.
• 10. FROST R.L., 1995, Fourier transform raman spectroscopy of kaolinite, dickite and halloysite, Clays and Clay Minerals, 43(2), 191-195.
• 11. FROST R.L., KRISTOF J., HORVATH E., KLOPROGGE J.T., 2000, Rehydration and phase changes of potassium acetate-intercalated halloysite at 298 K, Journal of Colloid and Interface Science, 226, 318-327.
• 12. HORVATH E., KRISTOF J., KURDI R., MAKO E., KHUNOVA V., 2011, Study of urea intercalation into halloysite by thermoanalytical and spectroscopic techniques, Journal of Thermal Analysis and Calorimetry, 105, 53-59.
• 13. JOUSSEIN E., PETIT S., DELVAUX B., 2007, Behavior of halloysite clay under formamide treatment, Applied Clay Science, 35, 17–24.
• 14. JOUSSEIN E., PETIT S., FIALIPS C., VIEILLARD P., RIGHI D., 2006, Differences in the dehydration-rehydration behavior of halloysites: new evidence and interpretations, Clays and Clay Minerals, 54 (4), 473-484.
• 15. LEVIS S.R., DEASY P.B., 2002, Characterization of halloysite for use as a microtubular drug delivery system, International Journal of Pharmaceutics, 243, 125-134.
• 16. LUEVANOS A.M., DELGADO M.G.R., SALAS A.U., PEDROZA F.R.C., ALARCON J.G.O., 2011, Leaching kinetics of iron from low grade kaolin by oxalic acid solutions, Applied Clay Science, 51, 473–477.
• 17. MAKO E., SENKAR Z., KRISTOF J., VAGVÖLGYI V., 2006, Surface modification of mechano-chemically activated kaolinites by selective leaching, Journal of Colloid and Interface Science, 294, 362–370.
• 18. MANDAL S.K., BANERJEE P.C., 2004, Iron leaching from China clay with oxalic acid: effect of different physico-chemical parameters, International Journal of Mineral Processing, 74, 263–270.
• 19. MELLOUK S., CHERIFI S., SASSI M., MAROUF-KHELIFA K., BENGUEDDACH A., SCHOTT J., KHELIFA, A., 2009, Intercalation of halloysite from Djebel Debagh (Algeria) and adsorption of copper ions, Applied Clay Science, 44, 230–236.
• 20. MURRAY H.H., 2007, Applied Clay Mineralogy: Developments in Clay Science 2, Elsevier, Amsterdam.
• 21. OELKERS E.H., SCHOTT J., GAUTHIER J.M., HERRERO-RONCAL T., 2008, An experimental study of the dissolution mechanism and rates of muscovite, Geochimica et Cosmochimica Acta, 72, 4948–4961.
• 22. PANDA A.K., MISHRAA B.G., MISHRAC D.K., SINGHA R.K., 2010, Effect of sulphuric acid treatment on the physico-chemical characteristics of kaolin clay, Colloids and Surfaces A: Physicochemical and Engineering Aspects, 363, 98-104.
• 23. PRUETT R.J., PICKERING S.M., 2006, Kaolin, Pp. 383-399 in: Industrial minerals and rocks: commodities, markets and uses (J.E. Kogel, N.C. Trivedi, J.M. Barker and S.T. Krukowski, editors) 7th edn. SME. Colorado,
• 24. SAKLAR S., AGRILI H., ZIMITOGLU O., BAŞARA B., KAAN U., 2012, The characterization studies of the Northwest Anatolian halloysites/kaolinites, Bulletin of the Mineral Research and Exploration, 145, 48-61.
• 25. SINGER A., ZAREI M., LANGE F.M., STAHR K., 2004, Halloysite characteristics and formation in the northern Golan Heights, Geoderma, 123, 279–295.
• 26. SONUPARLAK B., SARIKAYA M., AKSAY I.A., 1987, Spinel phase formation during the 980°C exothermic reaction in the kaolinite-to-mullite reaction series, Journal of the American Ceramic Society, 70 (11), 837-842.
• 27. VEGLIO F., PASSARIELLO B., BARBARO M., PLESCIA P., MARABINI A.M., 1998, Drum leaching tests in iron removal from quartz using oxalic and sulphuric acids, International Journal of Mineral Processing, 54, 183–200
• 28. YOON R.H., SHI J., 1986, Processing of kaolin clay, Pp 366-379 in: Advances in Mineral Processing (P. Somasundran, Editor). AIME, New York.
• 29. ZHANG A., PAN L., ZHANG H., LIU S., YE Y., XIA M., CHEN X., 2012, Effects of acid treatment on the physico-chemical and pore characteristics of halloysite, Colloids and Surfaces A: Physicochemical and Engineering Aspects, 396, 182–188.