Al-O_(2)-酸体系降解苯酚的研究  

Study of phenol degradation in Al-O_(2)-acid system

作　　者：李培航 井文杰 靳朝喜 于向辉 李新鹏 鲁潇 魏学锋[3] Li Peihang;Jing Wenjie;Jin Chaoxi;Yu Xianghui;Li Xinpeng;Lu Xiao;Wei Xuefeng(Henan Luoyang Ecological Environment Monitoring Center,Luoyang 471000,China;Liming Research&Design Institute of Chemical Industry Co.,Ltd.,Luoyang 471000,China;College of Chemistry&Chemical Engineering,Henan University of Science and Technology,Luoyang 471023,China)

机构地区：[1]河南省洛阳生态环境监测中心,河南洛阳471000 [2]黎明化工研究设计院有限责任公司,河南洛阳471000 [3]河南科技大学化学化工学院,河南洛阳471023

出　　处：《化学推进剂与高分子材料》2024年第3期35-41,共7页Chemical Propellants & Polymeric Materials

摘　　要：研究了Al–O_(2)–酸体系对水中苯酚的降解。实验表明在ρ(Al)=4g/L,ρ(溶解氧)=9.08mg/L,pH=2的条件下,20mg/L苯酚降解5h,去除率可达99.71%。以亚甲基蓝为·OH的捕集剂,采用分光光度法间接测定·OH产生过程,DMP(2,9–二甲基–1,10–菲啰啉)分光光度计测定H_(2)O_(2)浓度。Al–O_(2)–酸体系是一个Al介导的过程,其中Al^(0)(零价铝)诱导·OH,然后氧化苯酚。H_(2)O_(2)的增减趋势与·OH检测浓度和苯酚降解趋势一致。苯酚在Al–O_(2)–酸体系中的降解具有明显的pH依赖性,并遵循伪一级动力学。在实验条件下,苯酚降解的表观活化能为74.49kJ/mol。Al–O_(2)–酸体系在含苯酚废水的降解中效率高、成本低,应用前景良好。The degradation of phenol in water in Al-O_(2)-acid system was investigated.The experiments showed that under the conditions ofρ(Al)=4 g/L,p(dissolved oxygen)=9.08 mg/L and pH=2,20 mg/L phenol was degraded for 5 h,and the removal rate could reach 99.71%.Methylene blue was used as the trapping agent for-OH,and the production process of-OH was indirectly determined by spectrophotometry,and the concentration of H_(2)O_(2)was determined by DMP(2,9-dimethyl-1,10-phenanthroline)spectrophotometer.Al-O_(2)-acid system is an Al-mediated process,wherein the Al^(0)(zero-valent aluminum)induces-OH,and then oxidizes phenol.The increase and decrease trends of H_(2)O_(2)are consistent with the determined concentration of-OH and the degradation trend of phenol.The degradation of phenol in the Al-O_(2)-acid system was clearly pH-dependent and followed pseudo-first-order kinetics.Under the test conditions,the apparent activation energy of phenol degradation was 74.49 kJ/mol.The Al-O_(2)-acid system is efficient and cost-effective,and has a promising application prospect in the degradation of phenol-containing wastewater.

关 键 词：羟基自由基 活性氧 零价铝 苯酚 高级氧化 

分 类 号：X703[环境科学与工程—环境工程]