响应面法优化硫酸根自由基降解对氯苯酚
发布时间：2019-03-14 17:34
【摘要】：利用响应面法(RSM)对原位掺硫活性炭活化过硫酸盐生成硫酸根自由基(SO-4·)降解对氯苯酚进行了研究。选择溶液初始pH值、反应温度及过硫酸钾/对氯苯酚物质的量比为考察因素,对氯苯酚拟一级降解速率常数(Y)为响应值,通过Box-Behnken设计方法(BBD)建立了以对氯苯酚拟一级降解速率常数为响应值的二次多项式模型,分析了各因素及其相互作用对拟一级降解速率常数的影响,确定了最佳反应条件。结果表明:所选取的3个因素中温度对拟一级降解速率常数的影响最为显著,且最佳反应温度为55℃,过硫酸钾/对氯苯酚物质的量比为25.64,溶液初始pH值为4.51.在该条件下,对氯苯酚拟一级降解速率常数的试验值为0.192 94min~(-1),与模型预测值偏差0.003 26min~(-1),说明响应面方法能够有效优化对氯苯酚的降解条件。
[Abstract]:The degradation of p-chlorophenol by in-situ sulfur-doped activated carbon activated persulfate to form sulfate radical (SO- 4) was studied by response surface method (RSM). The initial pH value of the solution, the reaction temperature and the ratio of potassium persulfate to p-chlorophenol were selected as the factors, and the pseudo-first-order degradation rate constant (Y) of p-chlorophenol was the response value. A quadratic polynomial model based on the pseudo-first-order degradation rate constant of p-chlorophenol was established by Box-Behnken design method (BBD). The effects of each factor and its interaction on the pseudo-first-order degradation rate constant were analyzed. The optimum reaction conditions were determined. The results showed that the optimum reaction temperature was 55 鈩，
本文编号：2440203
[Abstract]:The degradation of p-chlorophenol by in-situ sulfur-doped activated carbon activated persulfate to form sulfate radical (SO- 4) was studied by response surface method (RSM). The initial pH value of the solution, the reaction temperature and the ratio of potassium persulfate to p-chlorophenol were selected as the factors, and the pseudo-first-order degradation rate constant (Y) of p-chlorophenol was the response value. A quadratic polynomial model based on the pseudo-first-order degradation rate constant of p-chlorophenol was established by Box-Behnken design method (BBD). The effects of each factor and its interaction on the pseudo-first-order degradation rate constant were analyzed. The optimum reaction conditions were determined. The results showed that the optimum reaction temperature was 55 鈩，
本文编号：2440203
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