Alfin Kurniawan, Aline Natasia Kosasih, Jonathan Febrianto, Yi-Hsu Ju, Jaka Sunarso, Nani Indraswati, Suryadi Ismadji
The feasibility of cassava peel waste for Ni-sorption is evaluated in this work. The biosorbents are characterized by Boehm titration, Fourier transform-infra red (FTIR) spectroscopy, Nitrogen sorption, scanning electron microscopy-energy dispersive X-ray (SEM-EDX) analysis (e.g. elemental mapping) and X-ray photoelectron spectroscopy (XPS). Adsorption experiments are performed in batch mode at 30 °C (303.15. K), 45 °C (318.15. K) and 60 °C (333.15. K). The performance of several temperature dependence forms of isotherm models e.g. Langmuir, Freundlich, Sips and Toth to represent the adsorption equilibrium data is evaluated and contrasted. Sips model demonstrates the best fitting with the maximum uptake capacity for Ni(II) ions of 57. mg/g (0.971. mmol/g) at pH 4.5. For kinetic data correlation, pseudo-second order model shows the best representation. The chemisorption mechanism and thermodynamics aspect are also discussed. © 2011 Elsevier B.V.
Department of Chemical Engineering, Widya Mandala Catholic University, Surabaya 60114, Kalijudan 37, Indonesia; Department of Chemical Engineering, National Taiwan University of Science and Technology, Taipei 10607, 43, Sec. 4, Keelung Rd., Taiwan; Australian Research Council (ARC), Centre of Excellence for Electromaterials Science, Institute for Technology Research and Innovation, Deakin University, Victoria 3125, 221 Burwood Highway, Australia