Cu^(2+)和Mn^(2+)对Fe(Ⅱ)/H_2O_2及Fe(Ⅲ)/H_2O_2体系氧化苯酚的影响  

Effect of Cu^(2+) and Mn^(2+) on the oxidation of phenol by Fe(Ⅱ) /H_2O_2 and Fe(Ⅲ) /H_2O_2 systems

作　　者：赵吉[1] 杨晶晶[2] 马军[1] 

机构地区：[1]哈尔滨工业大学城市水资源与水环境国家重点实验室,哈尔滨150090 [2]苏州科技学院分离净化材料与技术研发中心,苏州215009

出　　处：《黑龙江大学自然科学学报》2013年第6期787-793,801,共8页Journal of Natural Science of Heilongjiang University

基　　金："十二五"国家科技支撑计划课题(2012BAC05B02);国家创新研究群体科学基金资助项目(51121062)

摘　　要：研究了Cu2+和Mn2+两种常见过渡金属离子对Fenton及类Fenton体系在不同条件下氧化苯酚效能的影响。实验结果表明,当pH值为3.2时,Cu2+对Fenton体系有明显的促进作用,而对类Fenton体系几乎无影响;相反,Mn2+对类Fenton体系有明显的促进作用,而对Fenton体系影响很小;二者的促进作用均随着H2O2浓度的提高而增强。当pH值从3.6升高至4.0时,Cu2+对Fenton体系的促进作用减弱,而Mn2+对类Fenton体系的促进作用增强,同时对Fenton体系也表现出促进作用;当pH值进一步升高至5.0和6.0时,Cu2+和Mn2+对Fenton及类Fenton体系均没有明显的强化作用。自由基抑制剂叔丁醇能够有效抑制Cu2+和Mn2+强化的Fenton及类Fenton体系对苯酚的氧化,表明HO·仍然是体系的主要氧化活性物种。As common transition metal ions in waters, the effect of Cu2＋ and Mn2＋ on the oxidation of phenol by Fenton and Fenton-like systems were studied and compared. The experimental results showed that Cu2＋ significantly enhanced the oxidation of phenol by Fenton system at pH = 3.2, while Mn2 ＋ enhanced the oxidation by Fenton- like system. The degree of enhancement became significant with the increase of the concentration of H202. Increas- ing pH from 3.6 to 4. 0, the enhancement caused by Cu2＋ decreased, while Mn2 ＋ enhanced the oxidation more sig- nificantly in both Fenton and Fenton-like systems. At pH = 5.0 and 6. 0, Cu2＋ and Mn2 ＋ exhibited little effect on Fenton and Fenton-like systems. The complete inhibition of oxidation of phenol by tea-butanol suggested that hy- droxyl radical was still the most important reactive species in the Cu2＋ and Mn2＋ participated Fenton and Fenton- like systems.

关 键 词：FENTON 类FENTON 铜离子 锰离子 苯酚 

分 类 号：X703[环境科学与工程—环境工程]