TY - JOUR
T1 - Enhanced Fenton-like degradation of refractory organic compounds by surface complex formation of LaFeO3 and H2O2
AU - Nie, Yulun
AU - Zhang, Lili
AU - Li, Yu You
AU - Hu, Chun
N1 - Funding Information:
This work was supported by the National Natural Science Foundation of China (No. 51278527 , 51138009 , 51221892 , 21125731 ) and 863 projects (No. 2012AA062606 ).
Publisher Copyright:
© 2015 Elsevier B.V.
PY - 2015
Y1 - 2015
N2 - Nanoscale LaFeO3 was prepared via sol-gel method and characterized by XRD, FTIR and N2 adsorption/desorption experiment. The results indicated that, LaFeO3 had a typical perovskite structure with a BET area of 8.5m2/g. LaFeO3 exhibited excellent Fenton activity and stability for the degradation of pharmaceuticals and herbicides in water, as demonstrated with sulfamethoxazole, phenazone, phenytoin, acyclovir and 2,4-dichlorophenoxyacetic acid, 2-chlorophenol. Among them, sulfamethoxazole (SMX) could be completely removed in LaFeO3-H2O2 system after reaction for 120min at neutral pH. Based on the ATR-FTIR analysis, the surface complex of LaFeO3 and H2O2 was formed, which was important and essential for the enhanced Fenton reaction by accelerating the cycle of Fe3+/Fe2+. Hence, more OH and O2-/HO2- were then produced in LaFeO3-H2O2 system, resulting in more efficient removal of refractory organic compounds. Based on the surface interaction of LaFeO3 and H2O2, a heterogeneous Fenton reaction mechanism was proposed.
AB - Nanoscale LaFeO3 was prepared via sol-gel method and characterized by XRD, FTIR and N2 adsorption/desorption experiment. The results indicated that, LaFeO3 had a typical perovskite structure with a BET area of 8.5m2/g. LaFeO3 exhibited excellent Fenton activity and stability for the degradation of pharmaceuticals and herbicides in water, as demonstrated with sulfamethoxazole, phenazone, phenytoin, acyclovir and 2,4-dichlorophenoxyacetic acid, 2-chlorophenol. Among them, sulfamethoxazole (SMX) could be completely removed in LaFeO3-H2O2 system after reaction for 120min at neutral pH. Based on the ATR-FTIR analysis, the surface complex of LaFeO3 and H2O2 was formed, which was important and essential for the enhanced Fenton reaction by accelerating the cycle of Fe3+/Fe2+. Hence, more OH and O2-/HO2- were then produced in LaFeO3-H2O2 system, resulting in more efficient removal of refractory organic compounds. Based on the surface interaction of LaFeO3 and H2O2, a heterogeneous Fenton reaction mechanism was proposed.
KW - Heterogeneous Fenton reaction
KW - LaFeO
KW - Mechanism
KW - Refractory organic compounds
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U2 - 10.1016/j.jhazmat.2015.03.065
DO - 10.1016/j.jhazmat.2015.03.065
M3 - Article
C2 - 25867592
AN - SCOPUS:84926480376
SN - 0304-3894
VL - 294
SP - 195
EP - 200
JO - Journal of Hazardous Materials
JF - Journal of Hazardous Materials
ER -