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XRF and nitrogen adsorption studies of acid-activated palygorskite

Published online by Cambridge University Press:  09 July 2018

Junping Zhang ,
Qin Wang ,
Hao Chen  and
Aiqin Wang
Junping Zhang
Affiliation:
Center of Eco-material and Eco-Chemistry, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, 730000, P.R.China Key Laboratory for Palygorskite Science and Applied Technology of Jiangsu Province, Huaian 223003, P.R. China
Qin Wang
Affiliation:
Center of Eco-material and Eco-Chemistry, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, 730000, P.R.China
Hao Chen
Affiliation:
School of Pharmaceutical and Chemical Engineering, Taizhou University, Linhai, 317000, P.R. China
Aiqin Wang*
Affiliation:
Center of Eco-material and Eco-Chemistry, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, 730000, P.R.China Key Laboratory for Palygorskite Science and Applied Technology of Jiangsu Province, Huaian 223003, P.R. China
*
*E-mail: [email protected]
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Abstract

The effects of acid activation on the chemical composition, surface area and pore structure of palygorskite from Xuyi (Jiangsu, P.R. China) were investigated systematically using X-ray fluorescence (XRF) and BET techniques. The palygorskite samples were activated with HCl, H2SO4 and H3PO4 of various concentrations at 80ºC for 4 h. The influences of acid concentration and acid type on the chemical composition, adsorption-desorption isotherms at 77 K, pore-size distribution, surface area and pore volume were studied in detail. The contents of most components of palygorskite decrease with increasing acid concentration except for Si and Ti. HCl shows a greater activation activity and its effect on the dissolution of components of palygorskite is greater than that of H2SO4 and H3PO4. It was found that 3 mol l–1 H3PO4 is a more efficient activator for increasing the number of micropores in palygorskite, whereas 12 mol l–1 HCl is more suitable for use in enhancing the number of meso- and macropores. The acid concentration and acid type have a great influence on the surface area and pore volume. HCl is the most effective at enhancing the external surface area and mesopore volume of palygorskite, whereas, H3PO4 is more suitable for use in improving the micropore surface and volume.

Keywords

palygorskitemicroporemesoporemacroporeacid activationX-ray fluorescenceBETHClH2SO4H3PO4
Type
Research Article
Information
Clay Minerals , Volume 45 , Issue 2 , June 2010 , pp. 145 - 156
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 2010

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References

Andreola, F., Castellini, E., Ferreira, J.M.F., Olhero, S. & Romagnoli, M. (2006) Effect of sodium hexametaphosphate and ageing on the rheological behaviour of kaolin dispersions. Applied Clay Science, 31, 56–64.CrossRefGoogle Scholar
Annabi-Bergaya, F. (2008) Layered clay minerals. Basic research and innovative composite applications. Microporous and Mesoporous Materials, 107, 141–148.CrossRefGoogle Scholar
Barret, E.P., Joyner, P.B. & Halenda, P. (1951) The determination of pore volume and area distributions in porous substances. I. Computations from nitrogen isotherms. Journal of the American Chemical Society, 73, 373–380.Google Scholar
Barrios, M.S., Gonzalez, L.V.F., Rodriguez, M.A.V. & Pozas, J.M.M. (1995) Acid activation of a palygorskite with HCI: Development of physico-chemical, textural and surface properties. Applied Clay Sciences, 10, 247–258.CrossRefGoogle Scholar
Bradley, W.F. (1940) The structural scheme of attapulgite. American Mineralogist, 25, 405–410.Google Scholar
Chen, H., Zhao, Y.G. & Wang, A.Q. (2007) Removal of Cu(II) from aqueous solution by adsorption onto acid-activated palygorskite. Journal of Hazardous Materials, 149, 346–354.Google Scholar
Chen, T.H. (2003) Nanometer scale mineralogy and geochemistry of palygorskite clays in the border of Jiangsu and Anhui provinces. PhD dissertation, pp. 103-105. Hefei University of Technology, China.Google Scholar
Chen, T.H., Xu, H.F., Peng, S.C., Wang, J.Q. & Xu, X.C. (2004) Nanometer scale study on reaction of palygorskite with acid: Reaction mechanism and change of specific surface area. Geological Journal of China Universities, 10, 98–105.Google Scholar
Dai, W.W. & Liu, Y.X. (2005) Mineralogical characteristics and pore structure of palygorskite pre- and post-hydrochloric acid modification from Mingguang, Anhui. Ada Mineralogica Sinica, 25, 393–398.Google Scholar
Galan, E. (1996) Properties and applications of palygorskite- sepiolite clays. Clay Minerals, 31, 443–453.CrossRefGoogle Scholar
Girgis, B.S., Yunis, S.S. & Soliman, A.M. (2002) Characteristics of activated carbon from peanut hulls in relation to conditions of preparation. Materials Letters, 57, 164–172.Google Scholar
Giiven, N., Caillerie, J.B.E. & Fripiat, J.J. (1992) The coordination of aluminum ions in the palygorskite structure. Clays and Clay Minerals, 40, 457–461.Google Scholar
Li, A., Wang, A.Q. & Chen, J.M. (2004) Studies on poly(acrylic acid)/attapulgite superabsorbent composite. I. Synthesis and characterization. Journal of Applied Polymer Science, 92, 1596–1603.Google Scholar
Mendioroz, S., Pajares, J., Benito, I., Pesquera, C., Gonzalez, F. & Blanco, C. (1987) Texture evolution of montmorillonite under progressive acid treatment: Change from H3 to H2 type of hysteresis. Langmuir, 3, 676–681.Google Scholar
Miao, S.D., Liu, Z.M., Zhang, Z.F., Han, B.X., Miao, Z.J., Ding, K.L. & An, G.M. (2007) Ionic liquid-assisted immobilization of Rh on attapulgite and its application in cyclohexene hydrogenation. Journal of Physical Chemistry C, 111, 2185–2190.Google Scholar
Myriam, M., Suarez, M. & Martín-Pozas, J.M. (1998) Structural and textural modifications of palygorskite and sepiolite under acid treatment. Clays and Clay Minerals, 46, 225–231.Google Scholar
Passe-Coutrin, N., Altenor, S., Cossement, D., Jean-Marius, C. & Gaspard, S. (2008) Comparison of parameters calculated from the BET and Freundlieh isotherms obtained by nitrogen adsorption on activated carbons: A new method for calculating the specific surface area. Microporous and Mesoporous Materials, 111, 517–522.Google Scholar
Rodríguez, M.A., Suarez, M., Munoz, M.A. & Gonzalez, J. de Dios. (1996) Comparative FT-IR study of the removal of octahedral cations and structural modifications during acid treatment of several silicates. Spectrochimica Ada; Part A: Molecular and Biomolecular Spectroscopy, 52, 1685–1694.Google Scholar
Suárez-Barrios, M., Flores-González, L.V., Vicente-Rodríguez, M.A. & Martín-Pozas, J.M. (1995) Acid activation of a palygorskite with HC1: Development of physico-chemical, textural and surface properties. Applied Clay Science, 10, 247–258.Google Scholar
Xue, S.Q., Reinholdt, M. & Pinnavaia, T.J. (2006) Palygorskite as an epoxy polymer reinforcement agent. Polymer, 47, 3344–3350.Google Scholar
Yan, J.M. & Zhang, Q.Y. (1979) Adsorption and Coacervation: Solid Surface and Pore, 74-76. Science Press, Beijing, China.Google Scholar
Zhang, J.P., Chen, H. & Wang, A.Q. (2006) Study on superabsorbent composite. IV. Effects of organification degree of attapulgite on swelling behaviors of polyacrylamide/organo-attapulgite composites. European Polymer Journal, 42, 101–108.CrossRefGoogle Scholar