Adsorption of copper and nickel on Na-bentonite |
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| Authors: | Zhi-rong Liu Shao-qi Zhou |
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| Institution: | 1. College of Science, Northwest A&F University, Yangling, Shaanxi 712100, China;2. Xi’an Institute of Geology and Mineral Resource, Xi’an, Shaanxi 710054, China;1. Department of Pharmacy and Biomedical Science, La Trobe Institute for Molecular Science (LIMS), La Trobe University, Bendigo, VIC-3550, Australia;2. Department of Arts and Sciences, Faculty of Engineering, Ahsanullah University of Science and Technology (AUST), Dhaka, 1208, Bangladesh;3. Materials Science and Research Center, Japan Atomic Energy Agency (JAEA), Hyogo 679–5148, Japan;4. Center of Excellence for Advanced Materials Research, Faculty of Science, King Abdulaziz University, Jeddah 21589, Saudi Arabia;1. Department of Energy and Environment Convergence Technology, Catholic Kwandong University, Gangneung 210701, South Korea;2. Department of Environmental Engineering, Catholic Kwandong University, Gangneung 210701, South Korea;3. Central Salt and Marine Chemicals Research Institute (CSIR-CSMCRI), G.B. Marg, Bhavnagar 364002, Gujarat, India |
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| Abstract: | The removal of copper and nickel from aqueous solution on the Na-bentonite has been studied under static conditions. Experiments were carried out as a function of solution pH, dosage of Na-bentonite, contact time and temperature. The adsorption equilibrium for nickel and copper onto Na-bentonite is reached in 200 min. The adsorption of copper and nickel is pH dependent in the pH range 2–9. The kinetic process of adsorption can be described by the pseudo-second-order kinetic equation excellently and the adsorption isotherm be fitted to the Langmuir model by means of regression analyses very well. The adsorption capacities follow the order of Cu2+ > Ni2+ in single-component systems and competitive adsorption capacities in order decreasing is Cu2+ > Ni2+ in binary-component systems. |
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