Synthesis of AuPdNi Powders Using an Environmentally Friendly Ultrasound Assisted Extraction for Obtaining Boric Acid from Colemanite: Optimization by Response Surface Methodology
Abstract
In this study, simple ultrasonic assisted extraction was proposed as the environmental method at all stages of catalyst synthesis.A homogeneous catalyst was synthesized from high grade monodisperse gold-palladium-nickel nanoparticles using ultrasonic assisted extraction method (UAE) instead of conventional methods to obtain boric acid from colemanite.The most important advantage of this method is that AuPdNi nanoparticles can be easily separated and used repeatedly for further studies. Because of this feature, increasing amount of boric acid obtained from colemanite using AuPdNi nanocatalyst was investigated.For the test parameters, solvent/solids ratio, pH, extraction time and extraction temperature were used for extraction. Responsive Surface Methodology (RSM) method was used to determine optimum conditions. In this study, it was determined that presence of AuPdNinanocatalyst significantly increased boric acid activity. Transmission electron microscopy (TEM), X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FTIR) analyses were performed for the characterization of nanomaterials. According to the results of the RSM test program, boric acid yield was found to be 95.73% with the aid of AuPdNi nanocatalyst.
Keywords
Colemanite,Ultrasound-assistedextraction,Central composite design,Optimization,AuPdNi nanocatalyst
References
- [1] R. Boncukoğlu, M. M. Kocakerim and H. Erşahan, "Upgrading of the reactor waste obtained during borax production from tincal," Mineral Engineering, vol. 12, pp. 1275–80, 1999.
- [2] R. F. Moseman, "Chemical disposition of Boron in animals and humans," Environmental Health Perspect, vol. 102, pp. 113-117, 1994.
- [3] H. Ucbeyiay and A. Ozkan, "Two-stage shear flocculation for enrichment of fine boron ore containing colemanite," Separation and Purification Technology, vol. 132, pp. 302-308, 2014.
- [4] B. Kuskay and A. N. Bulutcu, "Design parameters of boric acid production process from colemanite ore in the presence of propionic acid," Chemical Engineering and Processing: Process Intensification, vol. 50, pp. 377-383, 2011.
- [5] M. S. Celik, M. Hancer and J. D. Miller, "Flotation chemistry of boron minerals," Journal of Colloid and Interface Science, vol. 256, pp. 121-131, 2002.
- [6] S. Levent, A. Budak, M. Y. Pamukoğlu and M. Gönen, "Extraction of boric acid from tincal mineral by supercritical ethanol," The Journal of Supercritical Fluids, vol. 109, pp. 67-73, 2016.
- [7] A. Gür, "Dissolution mechanism of colemanite in sulphuric acid solutions," Korean Journal Chemistry Engineer, vol. 24, pp. 588-59, 2007.
- [8] M. Yeşilyurt, "Determination of the optimum conditions for the boric acid extraction from colemanite ore in HNO3 solutions," Chemical Engineering and Processing: Process Intensification, vol. 43, pp. 1189-1194, 2004.
- [9] M. Yesilyurt, S. Çolak, T. Çalban and Y. Genel, "Determination of the optimum conditions for the dissolution of colemanite in H3PO4 solutions," Industrial & Engineering Chemistry Research, vol. 44, pp. 3761-3765, 2005.
- [10] S. Koca and M. Savas, "Contact angle measurements at the colemanite and realgar surfaces," Applied Surface Science, vol. 225, pp. 347-355, 2004.