海藻纤维素固载化Cu(salen)催化氧化降解三氯生  

Oxidative Degradation of Triclosan by Seaweed Cellulose Immobilized Cu(salen)

作　　者：杨静业 周学飞[1] YANG Jing-ye;ZHOU Xue-fei(Faculty of Chemical Engineering,Kunming University of Science and Technology,Kunming 650504,China)

机构地区：[1]昆明理工大学化学工程学院,云南昆明650504

出　　处：《纤维素科学与技术》2023年第1期50-59,共10页Journal of Cellulose Science and Technology

摘　　要：以大型褐藻海蒿子为原料,分离提取高结晶度的海藻纤维素,固载化仿酶配合物Cu(salen)催化降解三氯生(TCS)水溶液。通过正交实验确定纤维素/Cu(salen)催化三氯生水溶液的最佳工艺条件,利用TOC、GC-MS、EPR考察了降解过程中的活性自由基和底物结构变化。结果表明:纤维素/Cu(salen)对TCS有很好的降解效果,在最佳工艺条件下,TCS的降解率可达到97.4%。通过EPR测试,发现降解过程的活性物质以羟基自由基为主,同时硫酸根自由基也参与了反应;TCS的降解主要以醚键断裂和苯环碳碳键断裂两种方式,生成毒性较小的小分子化合物。The high-crystallinity seaweed cellulose was isolated and extracted from the large brown alga sargassum pallidum,and the immobilized Cu(salen)mimic enzyme complex catalyzed the degradation of TCS aqueous solution.The optimal process conditions of cellulose/Cu(salen)catalyzed triclosan aqueous solution were determined by orthogonal experiments,and the active free radicals and substrate structure changes during the degradation process were investigated by TOC,GC-MS and EPR.The results show that cellulose/Cu(salen)has a good degradation effect on TCS,and the degradation rate of TCS can reach 94.7%under the optimal process conditions.Through the EPR test,it was found that the active substances in the degradation process were mainly hydroxyl radicals,and the sulfate radical also participated in the reaction.TCS generates less toxic small molecular compounds through two degradation pathways:ether bond breaking and benzene ring carbon-carbon bond breaking.TCS generates less toxic small molecular compounds through two degradation pathways:ether bond breaking and benzene ring carbon-carbon bond breaking.

关 键 词：海藻纤维素 希夫碱 铜配合物 固定化 三氯生 

分 类 号：O636.1[理学—高分子化学]