Through Fenton reagent oxidation,sodium hypochlorite oxidation,hydrogen peroxide and photo-catalytic oxidation techniques,industrial chemical fiber wastewater（ICFW） was treated.The treatment effects are analyzed with UV-Vis and COD determent.The results show that the chroma of ICFW can be decreased obviously using the advanced oxidation techniques and its data decreased from more than 800 times to 10 times and the COD of wastewater also reduced evidently from 1800 mg/L to below 100 mg/L.The optimum chemical process conditions is pH 4-6,stir speed 1500 r/min,stir time 30 min and COD removal rate of waste water would reach 95.67%.Using hydrogen peroxide and sodium hypochlorite to treat the wastewater can discover the basic principle of free radical oxidation and the chain reaction caused the degradation of organic matters.A few generate free radicals to some extent to stimulate the senior oxidation reaction,and the deepening of the very small amounts of free radicals crosslinking may annihilate the reaction.Hence through the control of reactant type,the quantity and effective separation reaction product can achieve to degrade organic compounds and realize the best treatment effect.%通过芬顿试剂氧化、次氯酸钠氧化、过氧化氢和光催化氧化方法对化纤废水进行了处理,并通过COD检测、紫外可见光光度计等方法对氧化效果进行分析。结果显示自由基氧化对化纤废水的色度减小非常明显,能使其色度从800多倍减少到10倍以下,COD值从3 550 mg/L降解到100 mg/L以下,透光率的变化率达到98.59%。化学处理工艺的探讨发现在pH值4～6,搅拌速度为1 500 r/min,处理30 min就能使废水的COD去除率达到95.67%;pH为4时过氧化氢的氧化效果最佳。利用过氧化氢和次氯酸钠的氧化获得了自由基氧化处理此类废水的基本原理,即自由基氧化和链式反应的持续发生造成了有机物的降解,少量自由基的生成某种程度上刺激了高级氧化反应的深入,同时极少量自由基的交联可能会湮灭氧化反应,不同类自由基之间形成竞争,可能影响其氧化性能的发挥,因此需要通过控制反应物的种类、用量和有效分离反应中间产物,可以达到高级氧化反应处理此种废水的最佳效果。
展开▼
