Catalytic degradation of Acid Orange 7 in water by persulfate activated with CuFe2O4@RSDBC. (6th January 2020)

• Record Type: Journal Article
• Authors: Guan, Kun; Zhou, Peijiang; Zhang, Junye; Zhu, Longlong
• Is Part Of: Materials research express. Volume 7:Number 1(2020)
• Publication Date: 2020-01-06
• Subjects: catalyst -- CuFe2O4@RSDBC -- character -- persulfate activation -- degradation; Materials science -- Research -- Periodicals; Materials science -- Periodicals; 620.11
• DOI: 10.1088/2053-1591/ab6253
• Languages: English
• ISSNs: 2053-1591

Abstract

Abstract: In this study, a novel series of rectorite/sludge derived biochar (RSDBC) supporting CuFe2 O4 (CuFe2 O4 @RSDBC) composites were prepared as an effective catalyst to active persulfate (PS) for the removal of Acid Orange 7 (AO7) in water. The character of catalyst was analyzed by scanning electron microscope (SEM), transmission electron microscopy (TEM), fourier transform infrared spectroscopy (FTIR) and x-ray diffraction (XRD). Various influencing factors including initial pH, PS concentration, catalyst dosage, initial dye concentration and reaction temperature were investigated. The optimal reaction conditions were found to be: PS concentration 2 mM; catalyst dosage 0.6 g l −1 ; initial pH value 7.0 and 25 °C of reaction temperature. Further radical quenching tests were performed by using ethanol, tert-butanol (TBA) and benzoquinone (BQ), which confirmed that sulfate radicals ( SO 4 · − ) and hydroxyl radicals (HO−) were the reactive species in the degradation process. The Gas chromatography-mass spectrometry (GC-MS) analysis was employed to determine the intermediate products and a plausible degradation pathway is proposed. In addition, the CuFe2 O4 @RSDBC sample exhibited high color removal ability (95%) and stable performance after three successive runs. At last, the catalyst proved a good removal effect for actual dye wastewater. These results indicate that CuFe2 O4 @RSDBC hybrids could be as effective catalysts for PS activation on dye pollutants elimination.