【摘 要】
：
Hydrogen peroxide (H2O2) disproportionation,iron precipitation,and narrow pH range are the drawbacks of traditional Fenton process.To surmount these barriers,we proposed a ferric ion (Fe3+)-ascorbic acid(AA) complex catalyzed calcium peroxide (CaO2) Fento
【机 构】
：
Hebei Key Laboratory of Heavy Metal Deep-Remediation in Water and Resource Reuse,Hebei Key Laborator
论文部分内容阅读
Hydrogen peroxide (H2O2) disproportionation,iron precipitation,and narrow pH range are the drawbacks of traditional Fenton process.To surmount these barriers,we proposed a ferric ion (Fe3+)-ascorbic acid(AA) complex catalyzed calcium peroxide (CaO2) Fenton-like system to remove organic dyes in water.This collaborative Fe3+/AA/CaO2 system presented an obvious improvement in the methyl orange (MO)decolorization,and also effectively eliminated other dyes.Response surface method was employed to op-timize the running parameters for this coupling process.Under the optimized arguments (2.76 mmol/L Fe3+,0.68 mmol/L AA,and 4 mmol/L CaO2),the MO removal achieved 98.90％ after 15 min at pH 6.50,which was close to the computed outcome of 99.30％.Furthermore,this Fenton-like system could perform well in a wide range of pH (3-11),and enhance the H2O2 decomposition and Fe ions recycle.The scav-enger experiment result indicated that hydroxyl radical,superoxide anion free radical,and singlet oxygen were acted on the dye elimination.Moreover,electron spin resonance analysis corroborated that the ex-istences of these active species in the Fe3+/AA/CaO2 system.This study could advance the development of Fenton-like technique in organic effluent disposal.
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