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http://dx.doi.org/10.9713/kcer.2017.55.6.854

Preparation of PSf/D2EHPA/CNTs Beads Immobilized with Carbon Nanotubes and Di-(2-ethylhexyl)-phosphoric acid on Polysulfone and Removal Characteristics of Sr(II)  

Lee, Min-Gyu (Department of Chemical Engineering, Pukyoung National University)
Yun, Jong-Won (Department of Biotechnology, Daegu University)
Suh, Jung-Ho (Department of Environmental & Chemical Industry, Ulsan College)
Publication Information
Korean Chemical Engineering Research / v.55, no.6, 2017 , pp. 854-860 More about this Journal
Abstract
PSf/D2EHPA/CNTs beads were prepared by immobilizing extractant di-(2-ethylhexyl)- phosphoric acid (D2EHPA) and adsorbent carbon nanotubes (CNTs) on polysulfone (PSf), and the adsorption characteristics of Sr(II) on the beads were studied. The morphological characteristics of the prepared PSf/D2EHPA/CNTs beads were observed by scanning electron microscopy (SEM), thermo gravimetric analysis (TGA), and Fourier transform infrared spectrometer (FTIR). The equilibrium time for the removal of Sr(II) by PSf/D2EHPA/CNTs beads was 60 min. The experimental kinetic data followed pseudo-second-order model more than pseudo-first-order kinetics model. The maximum removal capacity of Sr(II) obtained from Langmuir isotherm was 4.75 mg/g. The removal efficiencies of Sr (II) by PSf/D2EHPA/CNTs beads were improved 2.5 times by adding the adsorbent CNTs more than by using only the extractant D2EHPA.
Keywords
Carbon nanotubes; CNTs; Di-(2-ethylhexyl)-phosphoric acid; D2EHPA; Immobilization; Polysulfone; Sr(II) removal;
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Times Cited By KSCI : 3  (Citation Analysis)
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