Temperature-dependent kinetics of aluminum leaching from peat clay
DOI:
https://doi.org/10.11113/mjfas.v16n2.1479Keywords:
aluminum, kinetics, leaching, peat clay,Abstract
The leaching kinetics of aluminum from peat clay using 4 M HCl at dissimilar leaching temperatures (30–90 °C) was investigated. The maximum of aluminum recovery was 91.27% after 60 min of leaching in agitated Pyrex reactor at 90 °C. The model involved the concept of shrinking core in order to describe aluminum that is located inside the core solid particle of peat clay that shrinks as the extracted solute, and it assumed the unchanged particle structure, a first-order leaching kinetics mechanism and a linear equilibrium at the interface of solid-liquid. The proposed model was corresponding to fit experimental data and to simulate the aluminum leaching from peat clay with four fitting parameters of temperature, which was confirmed with the mass transfer coefficient (kc, cm/s), diffusion coefficient (De, cm2/s), and reaction rate constants (k, cm/s) by following an increasing trend with increasing temperature. Moreover, it was validated by the correlation coefficient (ccoef ≥ 0.9794), the root means square error (RMSE ≤ 0.485), the mean relative deviation modulus (E ≤ 3.290%), and the activation energy value (Ea = 19.15 kJmol-1). This model could describe the aluminum leaching kinetics from peat clay that suitable with experiment parameters and statistical criteria, by giving useful information for optimization, scaling-up, and design.
References
Ajemba, R.O., Onukwuli, O.D., 2012. Application of the shrinking core model to the analysis of alumina leaching from ukpor clay using nitric acid. International Journal of Engineering Research & Technology. 1, 3, 1–13.
Brown, W.H., Hrishikesan, K.G., 1966. Process for the production of alumina. United States Patent Online, No. 3, 240, 562.
Cheng, W.-P., Fu, C.-H., Chen, P.-H., Yu, R.-F., 2012. Dynamics of aluminum leaching from water purification sludge. Journal of Hazardous Materials. 217–218, 149–155.
Cheng, W.-P., Fu, C.-H., Chen, P.-H., Yu, R.-F., 2014. Factors affecting aluminum dissolve from acidified water purification sludge. International Journal of Chemical, Molecular, Nuclear, Material and Metallurgical Engineering. 8, 8, 878–881.
Cui, L., Guo, Y., Wang, X., Du, Z., Cheng, F., 2015. Dissolution kinetics of aluminum and iron from coal mining waste by hydrochloric acid. Chinese Journal of Chemical Engineering. 23, 590–596.
Estokova, A., Oravec, J., Kovalcikova, M., 2015. Environmental impact assessment of the concrete composites in terms of the selected toxic metals leaching. Chemical Engineering Transactions. 43, 1915–1920.
Gertenbach, D., 2002. Solid–liquid extraction technologies for manufacturing nutraceuticals. In J. Shi, G. Mazza, & M. Le Maguer (Eds.), Functional foods: Biochemical and processing aspects. Boca Raton FL: CRC Press. 331 – 366.
Iannicelli Zubiani, E.M.I., Cristiani, C., Dotelli, G., Stampino, P.G., Pelosato, R., 2015. Recovery of rare earths and precious metals from waste electrical and electronic equipment by acid leaching and immobilized chelating agents. Chemical Engineering Transactions. 43, 2413–2418.
Karjalainen, S.M., Ronkanen, A.-K., Heikkinen, K., Kløve, B., 2016. Long-term accumulation and retention of al, fe and p in peat soils of northern treatment wetlands. Ecological Engineering. 93, 91-103.
Li, M., Zhang, X., Liu, Z., Hu, Y., Wang, M., Liu, J., Yang, J., 2013. Kinetics of leaching fluoride from mixed rare earth concentrate with hydrochloric acid and aluminum chloride. Hydrometallurgy. 140, 71–76.
Mirwan, A., Susianto, S., Altway, A., Handogo, R., 2017. A modified shrinking core model for leaching of aluminum from sludge solid waste of drinking water treatment. International Journal of Technology. 8,1, 19–26.
Mirwan, A., Susianto, S., Altway, A., Handogo, R., 2018. Kinetic model for identifying the rate controlling step of the aluminum leaching from peat clay. Jurnal Teknologi. 80, 2, 37–44.
Safari, V., Arzpeyma, G., Rashchi, F., Mostoufi, N., 2009. A shrinking particle—shrinking core model for leaching of a zinc ore containing silica. International Journal of Mineral Processing. 93, 1, 79–83.
Santos, F. M. F., Pina, P. S., Porcaro, R., Oliveira, V. A., Silva, C. A., Leao, V.A., 2010. The kinetics of zinc silicate leaching in sodium hydroxide. Hydrometallurgy. 102, 43–49.
Schwartzberg, H. G., Chao, R. Y., 1982. Solute diffusivities in leaching processes. Food Technology. 73–86.
Wendt, H., O’Connor, D. J., 1989. Alumina extraction from non bauxitic materials, Aluminium-Verlag GmbH, Düsseldorf. 1988. 370 Seiten, Preis: DM 160, Berichte Bunsenges. International journal of research in physical chemistry and chemical physics. 93, 5, 639–639.
Xue, B., Sho-hua, Y., Wen-yuan, W., 2011. Leaching kinetics of bastnaesite concentrate in HCl solution. Transactions of Nonferrous Metals Society of China. 21, 2306–2310.
