TY - JOUR
T1 - Removal of polyvinyl alcohol from aqueous solutions using P-25 TiO2 and ZnO photocataysts
T2 - A comparative study
AU - Lin, Chia Chang
AU - Hsu, Ling Jung
PY - 2013/9
Y1 - 2013/9
N2 - This investigation evaluates the effectiveness of P-25 TiO2 and ZnO in removing polyvinyl alcohol (PVA) from aqueous solutions. The effects of pH, photocatalyst dosage, initial PVA concentration, and UV wavelength on the removal efficiency of PVA were studied. Under acidic conditions, the removal efficiency of PVA using P-25 TiO2 exceeded that under alkaline conditions. However, the removal efficiency of PVA using ZnO under alkaline conditions exceeded that under acidic conditions. Additionally, the removal efficiency of PVA increased with photocatalyst dosage, but declined as the initial PVA concentration increased. The UV wavelength slightly affected the removal efficiency of PVA using P-25 TiO2, but dramatically affected that using ZnO. At UV-254nm, pH9, a photocatalyst dosage of 0.12g/L, and an initial PVA concentration of 20mg/L, the removal efficiencies of PVA using P-25 TiO2 and ZnO were 54% and 74%, respectively. Therefore, at UV-254nm and pH9, ZnO was more effective than P-25 TiO2.
AB - This investigation evaluates the effectiveness of P-25 TiO2 and ZnO in removing polyvinyl alcohol (PVA) from aqueous solutions. The effects of pH, photocatalyst dosage, initial PVA concentration, and UV wavelength on the removal efficiency of PVA were studied. Under acidic conditions, the removal efficiency of PVA using P-25 TiO2 exceeded that under alkaline conditions. However, the removal efficiency of PVA using ZnO under alkaline conditions exceeded that under acidic conditions. Additionally, the removal efficiency of PVA increased with photocatalyst dosage, but declined as the initial PVA concentration increased. The UV wavelength slightly affected the removal efficiency of PVA using P-25 TiO2, but dramatically affected that using ZnO. At UV-254nm, pH9, a photocatalyst dosage of 0.12g/L, and an initial PVA concentration of 20mg/L, the removal efficiencies of PVA using P-25 TiO2 and ZnO were 54% and 74%, respectively. Therefore, at UV-254nm and pH9, ZnO was more effective than P-25 TiO2.
KW - PVA
KW - Photocatalytic degradation
KW - Polyvinyl alcohol
KW - TiO
KW - ZnO
UR - https://www.scopus.com/pages/publications/84879161890
U2 - 10.1016/j.powtec.2013.05.027
DO - 10.1016/j.powtec.2013.05.027
M3 - 文章
AN - SCOPUS:84879161890
SN - 0032-5910
VL - 246
SP - 351
EP - 355
JO - Powder Technology
JF - Powder Technology
ER -