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Low-temperature synthesis of zeolite from perlite waste — Part I: review of methods and phase compositions of resulting products

Abstract

In this paper a review of the recent studies on the synthesis of zeolites from expanded perlite under hydrothermal conditions is presented. Attention is paid to possible outcomes of synthesis from low cost glass material, such as perlite. The study also investigates the phase composition of zeolitic materials obtained by modification of by-product derived from an expanded perlite production process. The synthesis was made using the hydrothermal method with sodium hydroxide under autogenous pressure at a temperature below 100 °C for 1 to 72 h. It was possible to obtain a zeolitic material at a temperature as low as 60 °C using 4.0 M NaOH. The X-ray diffraction pattern showed the biggest peak intensity of zeolite X with 4.0 M NaOH at the temperature of 70 °C. During synthesis at higher temperature zeolite Na-P1 (with 3.0 M NaOH at 90 °C) and hydroxysodalite (with 5.0 M NaOH at 90 °C) were obtained.

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Low-temperature synthesis of zeolite from perlite waste — Part II: characteristics of the products

Abstract

The paper investigates the properties of sodium zeolites synthesized using the hydrothermal method under autogenous pressure at low temperature with NaOH solutions of varying concentrations. During this modification, zeolites X, Na-P1 and hydroxysodalite were synthesized. The synthesis parameters, and thus, phase composition of resulting samples, significantly affected the specific surface area (SSA) and cation exchange capacity (CEC). SSA increased from 2.9 m2/g to a maximum of 501.2 m2/g, while CEC rose from 16 meq/100 g to a maximum of 500 meq/100 g. The best properties for use as a sorbent were obtained for perlite waste modified with 4.0 M NaOH at 70 °C or 80 °C.

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Antimicrobial materials properties based on ion-exchange 4A zeolite derivatives

, N. (2016). Antimicrobial behavior of ion-exchanged zeolite X containing fragrance. Micropor. Mesopor. Mat. 234, 55–60. http://dx.doi.org/10.1016/j.micromeso.2016.07.006 12. Ferreira, L., Fonseca, A.M., Botelho, G., Aguiar, C.A. & Neves, I.C. (2012). Antimicrobial activity of faujasite zeolites doped with silver. Micropor. Mesopor. Mat. 160, 126–132. http://dx.doi.org/10.1016/j.micromeso.2012.05.006 13. Fang, M., Chen, J.H., Xu, X.L., Yang, P.H. & Hildebrand, H.F. (2006). Antibacterial activities of inorganic agents on six bacteria associated with

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Effect of textural and chemical characteristics of activated carbons on phenol adsorption in aqueous solutions

.04.054. 10. Ma, L., Zhu, J., Xi, Y., Zhu, R., He, H., Liang, X. & Ayoko, G.A. (2016). Adsorption of phenol, phosphate and Cd(II) by inorganic–organic montmorillonites: A comparative study of single and multiple solute. Colloid Surf. A. 497, 63–71. DOI: 10.1016/j.colsurfa.2016.02.032. 11. Cheng, W.P., Gao, W., Cui, X., Ma, J.H. & Li, R.F. (2016). Phenol adsorption equilibrium and kinetics on zeolite X/activated carbon composite. J. Taiwan Inst. Chem. E. 62, 192–198. DOI: 10.1016/j.jtice.2016.02.004. 12. Hasan, Z. & Jhung S.H. (2015). Removal of hazardous

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