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KMID : 1024520160250121623
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Journal of the Environmental Sciences
2016 Volume.25 No. 12 p.1623 ~ p.1632
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Removal Characteristics of Sr and Cu Ions using PS-FZ Beads fabricated by Immobilization of Zeolite prepared from Coal Fly Ash from an Ulsan Industrial Complex with Polysulfone
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Kam Sang-Kyu
Lee Chang-Han
Jeong Kap-Seop
Lee Min-Gyu
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Abstract
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Zeolite (FZ) prepared using coal fly ash from an Ulsan industrial complex was immobilized with polysulfone (PS) to fabricate PS-FZ beads. The prepared PS-FZ beads were characterized by scanning electron microscopy and Fourier transform infrared spectroscopy. The optimum ratio for preparing PS-FZ beads was 1 g of PS to 2 g of FZ. The removal efficiencies of Sr and Cu ions by the PS-FZ beads increased as the solution pH increased and nearly reached a plateau at pH 4. A pseudo-second-order model morel fit the adsorption kinetics of both ions by the PS-FZ beads better than a pseudo-first-order model. The Langmuir isotherm model fit the equilibrium data well. The maximum adsorption capacities calculated from the Langmuir isotherm model were 46.73 mg/g and 62.54 mg/g for the Sr and Cu ions, respectively. Additionally, the values of thermodynamic parameters such as free energy (ΔG˚), enthalpy (ΔH˚) and entropy (ΔS˚) were determined. The results implied that the prepared PS-FZ beads could be interesting an alternative material for Sr and Cu ion removal.
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KEYWORD
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Adsorption, Zeolite, Strontium, Copper, Polysulfone
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