响应面法优化硫酸根自由基降解对氯苯酚  

Optimization of 4-Chlorophenol Degradation by Sulfate Radicals Using Response Surface Methodology

作　　者：郭耀萍[1,2] 曾泽泉 李昱琳[1,2] 黄张根 崔燕[1] GUO Yaoping;ZENG Zequan;LI Yulin;HUANG Zhanggen;CUI Yan(Institute of Coal Chemistry 狔 Chinese Academy o f Sciences 狊 Taiyuan 030000 China;University of Chinese 八 cademy o f Sciences,Beijing 1 1 ^ 0 4 9 , China)

机构地区：[1]中国科学院山西煤炭化学研究所煤转化国家重点实验室,太原030001 [2]中国科学院大学,北京100049

出　　处：《太原理工大学学报》2017年第6期924-928,共5页Journal of Taiyuan University of Technology

基　　金：山西省基础研究计划青年科技研究基金资助项目(2014021016-3);国家自然科学基金青年基金资助项目(21507140);中国科学院战略性先导科技专项基金资助项目(XDA07030300)

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。The degradation of 4-chlorophenol by SO^＊ generated from persulfate activated by in situ S-doped carbon was studied by using response surface methodology （RSM）. Box-Behnken design （BBD） was applied to establish a quadratic model describing pseudo-first-order degradation rate constant of 4-chlorophenol （ obtained at different levels of critical parameters,namely ini-tial pH of solution, reaction temperature and persulfate/4-chlorophenol molar ratio. The influ-ence of the parameters and their interaction on Y was discussed. Model results reveal that reac-tion temperature showed the most remarkable effect on Y and the optimum conditions were as fol-lows： initial solution pH of 4. 51, reaction temperature of 55 C and persulfate/4-chlorophenol molar ratio of 25. 64. Under the optimum operating condition, the observed value of Y was 0. 192 94 min_1,which showed a deviation of 0. 003 26 min_1 from the predicted value, indicating the good applicability and feasibility of RSM for optimizing reaction conditions for 4-chlorophenol degradation.

关 键 词：硫酸根自由基 对氯苯酚 降解条件 响应面法 BOX-BEHNKEN设计 

分 类 号：TQ243.3[化学工程—有机化工]