TY - JOUR
T1 - Phosphine-functionalized electrospun poly(vinyl alcohol)/silica nanofibers as highly effective adsorbent for removal of aqueous manganese and nickel ions
AU - Islam, Md Shahidul
AU - Rahaman, Md Saifur
AU - Yeum, Jeong Hyun
N1 - Publisher Copyright:
© 2015 Elsevier B.V.
PY - 2015/11/5
Y1 - 2015/11/5
N2 - Phosphine-functionalized PVA/SiO2 (pgf-PVA/SiO2) composite nanofiber adsorbent (porous) was prepared using a facile electrospinning technique. The successful fabrication of the pgf-PVA/SiO2 nanofibers was confirmed by field emission-scanning electron microscopy (FE-SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), and Fourier transform infrared (FTIR) analyses. The nanofiber adsorbent was evaluated for water sensitivity, N2 adsorption-desorption isotherms, pore size distribution, and manganese (Mn+2) and nickel (Ni+2) ions removal from aqueous solution at various pH, contact times, and adsorbent dosages as well as at different regeneration/reuse cycles. The composite pgf-PVA/SiO2 nanofibers (with 0.5g/L fiber loading) can remove almost completely (96-98%) the aforementioned ions from aqueous solutions (initial concentration of 120mg/L, pH 6) within 15min of contact time. A reasonably simple acid treatment (with a 1M HCl solution) was found to be extremely effective in regenerating the nanofiber adsorbent, and 92.5% of the metal ions were removed from the adsorbent even in the fifth regeneration/reuse cycle. Additionally, the adsorption equilibrium studies revealed the excellent adsorption capacities of the pgf-PVA/SiO2 nanofiber for both Mn+2 and Ni+2 ions (234.7 and 229.9mg/g, respectively).
AB - Phosphine-functionalized PVA/SiO2 (pgf-PVA/SiO2) composite nanofiber adsorbent (porous) was prepared using a facile electrospinning technique. The successful fabrication of the pgf-PVA/SiO2 nanofibers was confirmed by field emission-scanning electron microscopy (FE-SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), and Fourier transform infrared (FTIR) analyses. The nanofiber adsorbent was evaluated for water sensitivity, N2 adsorption-desorption isotherms, pore size distribution, and manganese (Mn+2) and nickel (Ni+2) ions removal from aqueous solution at various pH, contact times, and adsorbent dosages as well as at different regeneration/reuse cycles. The composite pgf-PVA/SiO2 nanofibers (with 0.5g/L fiber loading) can remove almost completely (96-98%) the aforementioned ions from aqueous solutions (initial concentration of 120mg/L, pH 6) within 15min of contact time. A reasonably simple acid treatment (with a 1M HCl solution) was found to be extremely effective in regenerating the nanofiber adsorbent, and 92.5% of the metal ions were removed from the adsorbent even in the fifth regeneration/reuse cycle. Additionally, the adsorption equilibrium studies revealed the excellent adsorption capacities of the pgf-PVA/SiO2 nanofiber for both Mn+2 and Ni+2 ions (234.7 and 229.9mg/g, respectively).
KW - Adsorbent
KW - Mn and Ni ions removal
KW - Phosphine group
KW - Poly(vinyl alcohol)
KW - Silica
UR - http://www.scopus.com/inward/record.url?scp=84938878283&partnerID=8YFLogxK
U2 - 10.1016/j.colsurfa.2015.07.023
DO - 10.1016/j.colsurfa.2015.07.023
M3 - Article
AN - SCOPUS:84938878283
SN - 0927-7757
VL - 484
SP - 9
EP - 18
JO - Colloids and Surfaces A: Physicochemical and Engineering Aspects
JF - Colloids and Surfaces A: Physicochemical and Engineering Aspects
ER -