γ辐照降解水中四环素的研究  

γ-RADIATION INDUCED TETRACYCLINE REMOVAL IN AN AQUEOUS SOLUTION

作　　者：周飞[1] 郭照冰[1] 赵永富[2] 张超智[1] 林明月[1] 吴梦龙[1] 

机构地区：[1]南京信息工程大学环境科学与工程学院,江苏南京210044 [2]江苏省农业科学院原子能农业利用研究所,江苏南京210014

出　　处：《核农学报》2012年第6期888-893,共6页Journal of Nuclear Agricultural Sciences

基　　金：教育部留学回国人员启动基金(2012s001);江苏省环保科研课题(201017);江苏省"333高层次人才工程";"六大人才高峰"及"青蓝工程"资助项目;校科研项目(20110374);江苏省大学生实践创新计划项目(11CX006)

摘　　要：研究了γ辐照对水中四环素(TC)的降解作用,探讨了TC初始浓度、溶液pH值,以及联合H2O2、CH3OH对其辐照降解效果的影响。结果表明:γ辐照可有效降解水中TC。在酸性和碱性条件下,TC降解效果均有明显提高,其中以pH=9时TC去除率最高。添加H2O2可在一定程度上促进TC的γ辐照降解率;而添加CH3OH则明显抑制TC的γ辐照降解。通过量化计算和液质联用(LC-MS)分析发现,γ辐照降解水中TC主要是基于.OH自由基的氧化过程。Degradation effect of tetracycline（TC） by γ-radiation was investigated in an aqueous solution.The effects of initial concentrations of TC,pH values,combining with H2O2 or CH3OH on degradation of TC were studied.Results showed that TC can be effectively degradated by γ-irradiation in an aqueous solution.Degradation of TC could be remarkably improved both in acid solution and alkaline solution,especially when pH value was 9.0.In addition,H2O2 could gently promote degradation of TC induced by γ-radiation.While,CH3OH markedly restrained degradation of TC induced by γ-radiation.The degradation mechanism of TC was supposed by results of quantum chemical calculations and LC-MS.Results proved that degradation of TC induced by γ-radiation was mainly ascribed to ·OH oxidation.

关 键 词：Γ辐照 四环素 降解 .OH自由基 

分 类 号：S481.8[农业科学—农药学]