Mochamad Lutfi Firmansyah, Thalabul Ilmi, Rino Rakhmata Mukti, None Patmawati, Masahiro Goto
Chitosan adsorbents impregnated with a phosphonium-based ionic liquid (Chi_IL), trioctyldodecyl phosphonium chloride, were prepared for the adsorption of hexavalent chromium and compared to the performance of native chitosan. The physical and chemical properties of the adsorbents were characterized by Fourier-transform infrared spectroscopy, X-ray diffraction, scanning electron microscopy, and energy-dispersive X-ray spectroscopy. Effects of various parameters, such as pH, adsorbent dosage, contact time, temperature, and multi-component systems, were systematically examined. Chi_IL showed a high adsorption capacity (282.6 mg g−1) compared to native chitosan (238.1 mg g−1). The adsorption kinetics of the metals followed a pseudo-second-order kinetic model, and the experimental data were a good fit for the Freundlich isotherm model. Following the isotherm and activation energy parameter, adsorption of Cr(vi) onto Chi_IL follows a chemisorption process, possibly through an anionic exchange with the anion of the IL. The thermodynamic parameters suggested that the adsorption of Cr(vi) is a spontaneous and exothermic reaction. In the column adsorption, Chi_IL exhibited a longer column exhaustion time than that of native chitosan owing to the enhanced adsorption capacity caused by the introduction of IL. Moreover, the column with the parameters of 6 cm bed depth, 5 mL min−1 flow rate, and 50 mg L−1 was able to achieve the best performance in Cr(vi) adsorption. © 2022 The Royal Society of Chemistry
Nanotechnology Engineering, Airlangga University, Faculty of Advanced Technology and Multidiscipline, Jl. Dr Ir. H. Soekarno, Surabaya, 60115, Indonesia; Division of Inorganic and Physical Chemistry, Institut Teknologi Bandung, Faculty of Mathematics and Natural Science, Jl Ganesha 10, Bandung, 40132, Indonesia; Research Center for Nanoscience and Nanotechnology, Institut Teknologi Bandung, Jl Ganesha 10, Bandung, 40132, Indonesia; Research and Innovation Center for Advanced Materials, Institut Teknologi Sumatera, Jl. Terusan Ryacudu, Lampung, 35365, Indonesia; Department of Marine, Universitas Airlangga, Faculty of Fisheries and Marine, Jalan Mulyorejo Kampus C, Surabaya, 60115, Indonesia; Department of Applied Chemistry, Kyushu University, Graduate School of Engineering, 744 Motooka, Nishi-ku, Fukuoka, 819-0395, Japan; Center for Future Chemistry, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka, 819-0395, Japan
Research at a Glance
Register to unlock
Topics & SDG Alignment
Register to unlock
Collaboration
Register to unlock
Author Profile (Selected)
Register to unlock
References Overview
Register to unlock
Journal & Source
Register to unlock
Metadata & Integrity
Register to unlock