Activation of hydrogen peroxide by graphite supported H2SO4-CeO2 for isoniazid degradation under neutral pH. (8th March 2022)

• Record Type: Journal Article
• Authors: Jiang, Qihui; Qian, Ruyi; Shen, Tongdong; Tong, Shaoping
• Is Part Of: Water science and technology. Volume 85:Number 7(2022)
• Page Start: 2051
• Page End: 2064
• Publication Date: 2022-03-08
• Subjects: CeO2 -- degradation -- Fenton-like -- graphite felt -- hydrogen peroxide -- sulfate; Water -- Pollution; Sewage -- Purification; Water quality management; Periodicals; 628.168
• DOI: 10.2166/wst.2022.082
• Languages: English
• ISSNs: 0273-1223

Abstract

Abstract: Graphite felt (GF) supported cerium oxide (CeO2 ) composite with sulfation pretreatment (H2 SO4 -CeO2 /GF) was prepared by the impregnation method and employed as the catalyst to activate H2 O2 for degradation of isoniazid (INH). The obtained samples were characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM) and X-ray photoelectron spectrum (XPS). The results showed that H2 SO4 -CeO2 /GF had good properties in activating H2 O2 for the degradation of INH. The INH removal was about 89.4% in 120 min under the following conditions: H2 O2 2.94 mM, H2 SO4 -CeO2 /GF 2.6 g/L, INH 10 mg/L, initial pH at 6.8 and temperature at 25 °C. The effects of some reaction parameters, including initial H2 O2 concentration, initial INH concentration, initial pH value, the catalyst dosage and reaction temperature, on INH degradation were investigated. On the basis of mechanism study and intermediate analysis, the possible degradation pathway of INH was proposed. Besides, effective degradation of methyl orange (MO) and norfloxacin (NOF) also confirmed the high activity of H2 SO4 -CeO2 /GF in activation of H2 O2 . The H2 SO4 -CeO2 /GF was relatively stable, showing good application prospects. HIGHLIGHTS: Acidified cerium oxide/GF composite (H2 SO4 -CeO2 /GF) was prepared by impregnation. The activity of H2 SO4 -CeO2 /GF for activation of H2 O2 is high even at pH 7.0. The catalyst of H2 SO4 -CeO2 /GF is stable and has great potential for application. The role of acidification of sulfuric acid in the catalyst is explained. Graphical Abstract