【摘要】 Fenton氧化法是目前用于降解有机污染物的有效手段之一。以3,4-二羟基苯乙酸参与的类Fenton体系(DOPAC/Fe³⁺/H₂O₂)为研究对象,对污染物进行降解,并对初始pH值、DOPAC/Fe³⁺浓度比、H₂O₂浓度进行优化。结果表明:DOPAC/Fe³⁺/H₂O₂体系对污染物有较优的去除效果。在pH为3、DOPAC和Fe³⁺浓度比为1∶1、H₂O₂浓度为2mmol/L时,在15min内罗丹明B在DOPAC/Fe³⁺/H₂O₂体系中的去除率可达到99%以上,TOC去除率为62%。在该过程中,DOPAC也随污染物一起被矿化,避免了对环境的二次污染,体现了DOPAC/Fe³⁺/H₂O₂体系的环境友好性。更多还原

【Abstract】 Fenton oxidation is an efficient technique for degradation of organic pollutants.In this work, the degradation effect of contaminants in aqueous solutions by 3, 4-dihydroxyphenylacetic acid（DOPAC）involved Fenton-like system(DOPAC/Fe³⁺/H₂ O₂)was investigated.Optimization experiments were conducted,and the results showed that when molar ratio of DOPAC to Fe³⁺,initial pH and the concentration of H₂ O₂ was 1∶1,3 and 2 mmol/L,respectively,Rhodamine B could be rapidly degraded in 15 min with a removal rate of99% and TOC removal efficiency of 62%. Meanwhile,DOPAC could also be effectively mineralized in this degradation process,showing an environmental benignity of DOPAC/Fe³⁺/H₂ O₂ system.更多还原