以苯酚改性秸秆活性炭为活化剂,对过氧乙酸进行活化,利用活化后的过氧乙酸氧化降解偶氮染料金橙G。通过实验分析活化剂氧化剂浓度、初始pH、自由基抑制剂、阴离子及腐殖酸浓度对金橙G降解效果的影响。结果表明:以改性秸秆活性炭为活化剂,可有效活化过氧乙酸,从而有效氧化降解金橙G。通过改性秸秆活性炭浓度梯度和过氧乙酸浓度梯度的实验可以得出实验的最佳反应条件即活性炭、过氧乙酸的浓度比为5∶1。金橙G的降解效果受不同因素的影响,在中性pH环境中降解效果最好;通过自由基抑制剂实验可以得出这一体系产生的主要原因为羟基自由基,从而氧化降解金橙G;水中的氯离子对金橙G降解效果起一定的促进作用,而腐殖酸则起抑制效果。
Phenol modified straw activated carbon(AC) was used as activator to activate peracetic acid,and the activated peracetic acid was used to oxidize and degraded gold orange G(OG),an azo dye.The effects of the activator oxidant concentration,initial pH value,free radical inhibitor,anion and humic acid concentration on the degradation effect of the OG were analyzed.The results showed that the modified straw AC could effectively activate peracetic acid,and oxidized and degraded OG effectively.Through the experiments of modified straw AC concentration gradient and peracetic acid concentration gradient,the best reaction condition was got:the concentration ratio of AC and peracetic acid was 5∶1.The degradation effect of the OG was affected by different factors,and the degradation effect was the best in neutral pH environment.The hydroxyl radicals produced by this system were obtained through free radical inhibitor experiments,and the OG was oxidized and degraded.Chlorine ions in water had a certain effect on the degradation of the OG,while humic acid had inhibitory effect.
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基金资助
国家自然科学基金(51878431);水体污染控制与治理科技重大专项(2017ZX07201001);江苏省研究生实践创新计划项目(SJCX18-0874)
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