改性活性炭纤维对甲基橙厌氧降解的促进作用

采用硝酸(HNO₃)和双氧水(H₂O₂)对活性炭纤维(ACF)进行改性ACF(ACF_mod),ACF_mod的比表面积和平均孔容均有下降,但其平均孔径增大,且表面醌基含量多于ACF;在硫化钠(Na₂S)还原降解甲基橙体系中,加入炭质材料加速了甲基橙降解,并且促进效果最好的是ACF_mod;在厌氧污泥降解甲基橙体系中,投加炭质材料加速了甲基橙生物降解,且ACF_mod的降解效果好于ACF的;通过运行UASB反应器发现,投加ACF_mod对甲基橙的脱色率及对COD的去除率均高于未投加的反应器,甲基橙脱色率大于90%,COD去除率大于79%,说明ACF_mod对上流式厌氧污泥床反应器(UASB)系统降解甲基橙有促进作用.

Anaerobic degradation of methyl orange promoted by modified activated carbon fiber

Activated carbon fibers(ACF)were prepared by using nitric acid and hydrogen peroxide to obtain modified ACF,i.e.ACF mod,then the surface area and surface functional groups of the ACF mod were characterized.The results show that the specific surface area and average pore volume of the ACF mod are decreased,but the average pore size is increased,and the surface quinone content is more than the ACF.In the sodium sulfide(Na 2S)reductive degradation of methyl orange system,the added carbon materials accelerate the degradation of methyl orange,and ACF mod has the best promoting effect.In the anaerobic sludge degradation system,the carbon materials added accelerate biodegradation of methyl orange,further ACF mod is more favorable than ACF.By operating the UASB reaction system,the methyl orange removal and COD removal rates with ACF mod are higher than those without ACF mod,especially,the decolorization rate of methyl orange and COD removal rate are greater than 90%and 79%,respectively.This fact suggests that ACF mod has a favorable effect on degradation of methyl orange in the UASB system.