酸洗废硫酸/H2O2处理农药废水研究

以酸洗废硫酸和H₂O₂组成的氧化体系，降解农药废水中的COD。采用Box-Behnken试验设计，以COD去除率为响应值，考察了废硫酸投加量、H₂O₂投加量以及反应时间的单独作用和交互影响，通过建立COD降解率数学模型预测酸洗废硫酸/H2O2氧化体系的最佳氧化参数。结果表明，在废硫酸添加量为14.17 mL/L、H₂O₂添加量为1.47 mL/L、反应时间为55.9 min时，COD降解率存在最大值，为47.79%，在该条件下进行7次试验对模型预测结果进行验证，7次试验的COD降解率平均值为47.52%，与预测值相差0.56%，与拟合模型的预测值基本相符，该模型能够较好地解释酸洗废硫酸/H₂O₂氧化工艺。此外，对7次试验出水中Pb、Cr也进行了检测，7次试验出水中均未检测出Pb、Cr元素，因此，酸洗废硫酸中存在的微量重金属元素不会对最终出水水质产生影响。表明酸洗废硫酸/H₂O₂氧化体系用于农药废水处理工艺是可行的。

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Degrade the Chemical Oxygen Demand（COD） in the waste water of pesticide production by the Oxidation system consists of waste sulfuric acid and Hydrogen Peroxide.Study the reaction than the reaction time and the additive amount of waste sulfuric acid and Hydrogen Peroxide bring to degradation rate of chemical oxygen demand through Box-Behnken experimental design，the optimum reaction conditions were obtained by mathematical modelling that the reaction time and the additive amount of waste sulfuric and Hydrogen Peroxide is 55.9 min，14.17 mL/L and 1.47 mL/L.Under this condition，the degradation rate of chemical oxygen is 47.79%.In order to confirm the accuracy of mathematical model for 7 experiments，the average is 47.52%.There is a difference of 0.56% from the predicted value.It shows that the mathematical model can explain the process better.In addition，Pb and Cr were not detected in the actual test effluent.The results shows that trace amounts of heavy metals in waste acid have no affectation on effluent.So the oxidation system is feasible for the treatment of the waste water of pesticide production.