Effects of poly (vinyl alcohol) (PVA) content on preparation of novel thiol-functionalized mesoporous PVA/SiO2 composite nanofiber membranes and their application for adsorption of heavy metal ions from aqueous solution

Polymer ◽  
2010 ◽  
Vol 51 (26) ◽  
pp. 6203-6211 ◽  
Author(s):  
Shengju Wu ◽  
Fengting Li ◽  
Hongtao Wang ◽  
Lin Fu ◽  
Bingru Zhang ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Heavy Metal ◽  
Metal Ions ◽  
Vinyl Alcohol ◽  
Heavy Metal Ions ◽  
Poly Vinyl Alcohol ◽  
Composite Nanofiber ◽  
Nanofiber Membranes

scholarly journals Heavy metal ions removal from aqueous solution by xanthate-modified cross-linked magnetic chitosan/poly(vinyl alcohol) particles

RSC Advances ◽  
2017 ◽  
Vol 7 (45) ◽  
pp. 27992-28000 ◽  
Author(s):  
Long Lv ◽  
Nan Chen ◽  
Chuanping Feng ◽  
Jing Zhang ◽  
Miao Li
Keyword(s):  
Aqueous Solution ◽  
Heavy Metal ◽  
Aqueous Solutions ◽  
Metal Ions ◽  
Vinyl Alcohol ◽  
Heavy Metal Ions ◽  
Poly Vinyl Alcohol ◽  
Magnetic Chitosan ◽  
Heavy Metal Ions Removal ◽  
Metal Ions Removal

Xanthate-modified cross-linked magnetic chitosan/poly(vinyl alcohol) particles (XCMCP) were synthesized and applied to remove Pb(ii) and Cu(ii) ions from aqueous solutions.

scholarly journals Surface modified polythiophene/Al2O3 and polyaniline/Al2O3 nanocomposites using poly(vinyl alcohol) for the removal of heavy metal ions from water: kinetics, thermodynamic and isotherm studies

2021 ◽  
Author(s):  
Zeynab Karimi ◽  
Reza Khalili ◽  
Mohammad Ali Zazouli
Keyword(s):  
Heavy Metal ◽  
Metal Ions ◽  
Vinyl Alcohol ◽  
Metal Ion ◽  
Heavy Metal Ions ◽  
Adsorption Process ◽  
Oxidative Polymerization ◽  
Ion Concentration ◽  
Poly Vinyl Alcohol ◽  
Order Kinetic

Abstract In this study, polythiophene/Al2O3 (PTh/Al2O3) and polyaniline/Al2O3 (PAn/Al2O3) nanocomposites in the presence of poly(vinyl alcohol) (PVA) as the surfactant were synthesized via in situ chemical oxidative polymerization method in aqueous medium. The synthesized nanocomposites were characterized by Scanning electron microscopy (SEM), Fourier transform-infrared (FTIR) spectroscopy and X-ray diffraction (XRD). Results indicated that the Al2O3 and poly(vinyl alcohol) influenced the properties of synthesized nanocomposites. The aim of this research was to investigate the sorption characteristic of polythiophene and polyaniline nanocomposites for the removal of heavy metal cations including Pb(II), Zn(II) and Cd(II) from aqueous solution. The factors that affected the adsorption equilibrium as well as the removal efficiency of the nanoadsorbents, i.e., contact time, metal ion concentration, pH and adsorption conditions were investigated in detail. From the kinetic results, it was concluded that the pseudo-second-order kinetic model was found to the best at describing the adsorption process for Pb(II), Zn(II) and Cd(II) on PTh-PVA/Al2O3 and PAn-PVA/Al2O3. In addition, thermodynamic analysis suggests the endothermic and spontaneous nature of the present adsorption process with increased entropy on PTh-PVA/Al2O3 and PAn-PVA/Al2O3. The results suggest polythiophene, polyaniline and their nanocomposites have great potential to be used as efficient absorbent for the removal of heavy metal ions from water.

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