Fenton法深度处理腈纶废水的特性

研究Fenton法深度处理难降解腈纶废水的影响因素及其优化反应条件,应用紫外和三维荧光光谱探讨腈纶废水生化出水中污染物的去除规律. 研究表明:初始pH由1.5升至6.0时,COD_Cr去除率由20.0%快速升至61.8%后再缓慢降至51.0%；c(Fe2+)由0.8 mmol/L增至10.8 mmol/L时,COD_Cr去除率先由2.5%增至58.0%再缓慢降至55.5%；c(H₂O₂)和反应时间对COD_Cr去除率影响较小. 正交试验极差表明,COD_Cr去除率的影响因素为初始pH>c(Fe2+)>c(H₂O₂)>反应时间,最优条件〔c(Fe2+)为7.20 mmol/L、c(H₂O₂)为0.16 mol/L、初始pH约为3、反应时间为90 min〕下腈纶废水生化出水ρ(COD_Cr)由308 mg/L降至103 mg/L,去除率为66.5%. 紫外和三维荧光光谱显示,腈纶废水生化出水中的类蛋白类物质完全被去除,大部分可见腐殖质类物质以及UV腐殖质类物质也被分解. 

Charactristics of Fenton Process in Advanced Treatment of Acrylic Fiber Wastewater

The Fenton process was applied in the treatment of effluent from an acrylic fiber wastewater treatment plant.The influencing factors and optimum conditions during the Fenton reaction were studied,and pollution degradation according to UV and three-dimensional fluorescence.The results showed that: the CODCr removal rate quickly increased from 20.0% to 61.8% and then slowly decreased to 51.0%,while the pH increased from 1.5 to 6.0;the Fe2+ concentration increased from 0.8 mmol/L to 10.8 mmol/L;the CODCr removal rate quickly increased from 2.5% to 58.0% and then slowly decreased to 55.5%;and,the H2O2 concentration and reaction time had little influence on the CODCr removal rate.The orthogonal experiment indicated that the order of degree of influence on the CODCr removal rate was pH > Fe2+ content > H2O2 content > reaction time.In optimum conditions(Fe2+ content 7.20 mmol/L,H2O2 content 0.16 mol/L,pH about 3,reaction time 90 min),the CODCr content could decrease from 308 mg/L to 103 mg/L,and the removal rate was 66.5%.The results of UV and three-dimensional fluorescence spectra indicated that all protein and most of visible humus and UV humus were removed.