利用Fenton试剂处理印染废水的过程参数优化

采用Fenton试剂氧化法处理亚甲蓝模拟印染废水（COD=2000mg／L），以COD去除率为评价指标，利用单因素优化及正交实验法，对Fenton试剂用量、反应时间和原水pH三个因素进行了研究。结果表明，增加Fenton试剂用量和延长反应时间可有效提高COD去除率，相对25mL水样优化的Fenton试剂用量为5．0mL试剂，反应时间为30min；调节原水pH，COD去除率呈现峰坡变化，优化的pH为4。在优化参数条件下，废水COD去除率可以达到88．77％。正交实验结果表明，Fenton试剂用量、反应时间和原水pH三个因素对COD去除率的影响由大到小依次为反应时间、Fenton试剂用量、原水pH。Fenton试剂氧化废水中，3因素的各水平对水样COD去除率的影响不明显。

Optimization of Process Parameters on Printing and Dyeing Wastewater Treatment With Fenton Reagent

Dyeing wastewater simulated with methylene blue（COD=2 000 mg/L） was treated by the means of Fenton reagent oxidation, the COD removal rate for the evaluation of indicators, by the methods of single factor and orthogonal experiments, the Fenton reagent dosage,reaction time and initial pH was researched. The results show that the COD removal rates of water sample increas with the increasing of Fenton reagent dosages and the reaction time, and the fitting Fenton reagent dosage and reaction time are 5 mL reagent and 25 mL aqueous sample and 30 min respectively. With the adjustment of initial water pH , the COD removal rates changed like peaks and slopes, and the fitting value was 4. In the course of Fenton reagent oxidizing wastewater, the COD removal rates of aqueous sample are not affected obviously by the every level of the three factors; And at the optimized conditions, the COD removal rate of water sample is removed to 88. 77%; The effect sequence of the three factors are reaction time〉Fenton reagent dosage〉initial water PH. In the course of Fenton reagent oxidating wastewater, to the COD removal rate of aqueous samples, the influence of three factors in the each level is not obvious.