Removal of Cr(VI) From Aqueous Solution by Polysulfone Microcapsules Containing Cyanex 923 as Extraction Reagent
Yükleniyor...
Dosyalar
Tarih
2010
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Elsevier Science Bv
Erişim Hakkı
info:eu-repo/semantics/openAccess
Özet
This paper describes the removal of Cr(VI) from aqueous solution in batch sorption technique by using polysulfone microcapsules containing Cyanex 923 as extraction reagent. The microcapsules containing Cyanex 923 (MCs-Cyanex 923) were prepared by solvent evaporation method and characterized by using optical microscope, Scanning Electron Microscopy (SEM), Fourier Transform Infrared Spectroscopy (FT-IR) and Thermal Gravimetric Analysis (TGA). The results showed that maximum removal of Cr(VI) was obtained when ratio of Cyanex 923 to polysulfone was 1.0. The complex formation between Cr(VI) and Cyanex 923 favoured at initial pH of 1.0. The equilibrium time was 30 min and it obeyed the pseudo second-order kinetic model. The Redlich Peterson and Langmuir isotherm models better represented the sorption data in comparison to Freundlich isotherm. The Langmuir sorption capacity of MCs-Cyanex 923 for Cr(VI) was 0.430 mmol g(-1). The MCs-Cyanex 923 preferably sorbed Cr(VI) against various metal ions, including Cr(III), Ni(II), Pb(II), Cu(II), Zn(II), Cd(II), Co(II). The regeneration studies also showed that MCs-Cyanex 923 could be re-used for the adsorption of Cr(VI) from aqueous solutions over 3 cycles.
Açıklama
Anahtar Kelimeler
Microcapsules, Cyanex 923, Chromium(VI), Sorption
Kaynak
Desalination
WoS Q Değeri
Q1
Scopus Q Değeri
Q1
Cilt
259
Sayı
Künye
Özcan, S., Tor, A., Aydın, M. E., (2010). Removal of Cr(VI) From Aqueous Solution by Polysulfone Microcapsules Containing Cyanex 923 as Extraction Reagent. Desalination, (259), 179-186. Doi: 10.1016/j.desal.2010.04.009
