NiFe(C2O4)xas a heterogeneous Fenton catalyst for removal of methyl orange.
This paper studies a heterogeneous Fenton catalyst NiFe(C2O4)x, which showed better catalytic activity than Ni(C2O4)xand better re-usability than Fe(C2O4)x. The methyl orange removal efficiency was 98% in heterogeneous Fenton system using NiFe(C2O4)x. The prepared NiFe(C2O4)xhad a laminated shape and the size was in the range of 2-4 μm, and Ni was doped into catalyst's structure successfully. The NiFe(C2O4)xhad a synergistic effect of catalyst of 24.7 for methyl orange removal, and the dope of Ni significantly reduced the leaching of Fe by 77%. The reaction factors and kinetics were investigated. Under the optimal conditions, 0.4 g/L of catalyst dose and 10 mmol/L of hydrogen peroxide concentration, 98% of methyl orange was removed within 20 min. Analysis showed that hydroxyl radicals and superoxide radicals participated in the reaction. With NiFe(C2O4)xcatalyst, the suitable pH range for heterogeneous Fenton system was wide from 3 to 10. The catalyst showed good efficiency after five times re-use. NiFe(C2O4)xprovided great potential in treatment of refractory wastewater with excellent property.
School of Environment & Natural Resource, Renmin University of China, Beijing, 100872, China.
Yucan
Y
Liu
School of Environment & Natural Resource, Renmin University of China, Beijing, 100872, China. Electronic address: zgm@ruc.edu.cn.
Guangming
G
Zhang
School of Environment & Natural Resource, Renmin University of China, Beijing, 100872, China.
Shan
S
Chong
School of Environment & Natural Resource, Renmin University of China, Beijing, 100872, China.
Nan
N
Zhang
School of Environment & Natural Resource, Renmin University of China, Beijing, 100872, China.
Huazhen
H
Chang
School of Environment & Natural Resource, Renmin University of China, Beijing, 100872, China.
Ting
T
Huang
School of Environment & Natural Resource, Renmin University of China, Beijing, 100872, China.
Shunyan
S
Fang
D001391:Azo Compounds / Q000737:chemistry*; D002384:Catalysis; D006861:Hydrogen Peroxide / Q000737:chemistry; D007501:Iron / Q000737:chemistry*; D007700:Kinetics; D009532:Nickel / Q000737:chemistry*; D014865:Waste Disposal, Fluid / Q000379:methods; D014874:Water Pollutants, Chemical / Q000737:chemistry*
D001391:Azo Compounds; D014874:Water Pollutants, Chemical; C100258:methyl orange; D009532:Nickel; D006861:Hydrogen Peroxide; D007501:Iron
Catalyst; Heterogeneous Fenton; Methyl orange; NiFe(C(2)O(4))(x)