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Adsorption of molybdenum on to anatase from dilute aqueous solutions
Institution:1. Shibaura Institute of Technology, 3-7-5, Toyosu, Koutouku, Tokyo 135-8548, Japan;2. Japan Atomic Energy Agency, 4-33, Muramatsu, Tokai-mura, Ibaraki 319-1194, Japan;3. Tokyo City University, 1-28-1, Tamazutsumi, Setagayaku, Tokyo 158-8557, Japan;4. High Energy Accelerator Research Organization, 1-1, Ooho, Tsukuba 305-0801, Japan;5. National Institute for Quantum and Radiological Science and Technology, 1233, Watanukicho, Takasaki, Gunma 370-1292, Japan;1. Department of Mechanical Engineering,JNTUH,Hyderabad, Telangana, India;2. Department of Mechanical Engineering, MVSR Engineering College, Hyderabad, Telangana, India;3. Department of Mechanical Engineering,College of Engineering Osmania University, Hyderabad, Telangana, India;1. Vin?a Institute of Nuclear Sciences, University of Belgrade, P.O. Box 522, 11001 Belgrade, Serbia;2. Faculty of Physical Chemistry, University of Belgrade, Studentski trg 12-16, 11158 Belgrade, Serbia;3. Institute of Technical Sciences of the Serbian Academy of Sciences and Arts, Knez Mihailova 35/IV, P.O. BOX 377, 11000 Belgrade, Serbia;1. Department of Physics, Institute of Technology, GITAM University, Visakhapatnam 530045, India;2. Advanced Analytical Laboratory, Andhra University, Visakhapatnam 530003, India;1. Faculty of Electrical and Electronic Engineering, Universiti Tun Hussein Onn Malaysia, Parit Raja, 86400, Johor, Malaysia;2. School of Computer Science and Electronic Engineering, University of Essex, Colchester, CO4 3SQ, United Kingdom;3. Faculty of Applied Science and Technology, Universiti Tun Hussein Onn Malaysia, Pagoh, 84600, Johor, Malaysia;4. Institute of Microengineering and Nanoelectronics, Universiti Kebangsaan Malaysia, Bangi, 43600, Selangor, Malaysia
Abstract:Adsorption of Mo on to hydrous TiO2 (anatase) particles was investigated. Batch experiments were conducted at 19 and 90 °C over a pH range of 2 to 12 and Mo concentrations ranging from approximately 10?6 to 10?4 M. The extent of sorption was strongly dependent on pH and surface loading. Maximum sorption was observed in the acidic pH range at low surface loading. Adsorption behavior was described using the empirical Langmuir adsorption model. A constant capacitance surface complexation model was also used to fit the adsorption isotherms using a ligand exchange reaction for a hydroxyl surface site on anatase. Comparison of experimental data at two different temperatures (19 and 90 °C) indicates that Mo sorption in the acidic pH range decreases with increasing temperature.
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