Microwave assisted catalytic oxidation of p-nitrophenol in aqueous solution using carbon-supported copper catalyst.
Carbon-supported copper (Cu/GAC) catalyst was prepared by conventional impregnation method and characterized by scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDX) and X-ray diffraction (XRD). The sizes of Cu particles dispersing on the surface of GAC were 0.3-1.5 microm, which could be penetrated by microwave so that Cu/GAC catalyst could absorb microwave energy effectively. The catalysis of Cu/GAC in microwave assisted catalytic oxidation of p-nitrophenol (PNP) in aqueous solution was investigated through a fixed bed reactor under ambient pressure and continuous flow mode. PNP removal reached 91.8% under optimized conditions, corresponding to 88% of TOC removal. It showed a higher PNP degradation and total organic carbon (TOC) removal for Cu/GAC catalyst than GAC alone, and Cu/GAC catalyst kept on a high catalysis and a good stability for a long time run, which indicated that GAC structure and catalytic capacity were improved by the load of Cu.
Bo
L L
LL
School of Environmental and Biological Science & Technology, Dalian University of Technology, Key Laboratory of Industrial Ecology and Environmental Engineering, Ministry of Education, Dalian 116024, China.
Zhang
Y B
YB
Quan
X
X
Zhao
B
B
D000327:Adsorption; D002244:Carbon / Q000737:chemistry*; D002384:Catalysis; D003300:Copper / Q000737:chemistry*; D008872:Microwaves; D009596:Nitrophenols / Q000737:chemistry / Q000528:radiation effects; D010084:Oxidation-Reduction; D012996:Solutions; D014874:Water Pollutants, Chemical / Q000737:chemistry / Q000528:radiation effects; D018508:Water Purification / Q000379:methods*
D009596:Nitrophenols; D012996:Solutions; D014874:Water Pollutants, Chemical; D002244:Carbon; D003300:Copper; C024836:4-nitrophenol