EGCG消毒过程中氧化聚合作用对色度的影响研究  

STUDY ON THE EFFECT OF OXIDATIVE POLYMERIZATION ON THE CHROMA IN THE PROCESS OF EGCG DISINFECTION

作　　者：冯萃敏[1] 吴新楷 汪长征[1] 王晓彤 储意轩 

机构地区：[1]北京建筑大学城市雨水系统与水环境省部共建教育部重点实验室,北京100044 [2]北京兴创投资有限公司,北京100044 [3]浙江科技学院废弃生物质循环利用与生态处理技术省重点实验室,杭州310000

出　　处：《环境工程》2017年第6期34-38,共5页Environmental Engineering

基　　金：国家自然科学基金项目:茶多酚作为饮用水辅助消毒剂的作用机制研究(51678026)

摘　　要：为探究茶多酚消毒时的色度问题,采用茶多酚中具有抑菌作用的主要成分表没食子儿茶素没食子酸脂(Epicatechin gallate,EGCG)为消毒剂,在不同条件下(消毒剂投加量、接触时间、水样p H、光照条件),测试EGCG氧化聚合反应对水样色度变化的影响。研究表明,非酶促氧化聚合反应主要受EGCG的投加量、水样p H的影响,其影响色度的方式是通过影响反应平衡进而控制聚合物的生成量;酶促氧化聚合反应的条件是存在多酚氧化酶(PPO),水中细菌可提供PPO,而光照条件是影响PPO活性的主要因素,水样p H的变化对于二聚醌(dimer quinone)进一步发生亲核加成反应起着关键作用。In order to explore problem in chromaticity in tea polyphenols disinfection, epicatechin gallate which is the main components of antimierobial effect is used as disinfectant. Under different conditions （ dosage of disinfectant, contact time, pH of water, illumination condition） , the effects of oxidative polymerization of EGCG on the water colority are tested. Research suggests that non enzymatic oxidation polymerization is mainly affected by the dosage of EGCG and pH of water, change of water chroma is cffected by reaction balance and then controlled production of polymers, the condition of enzymatic oxidative polymerization is the presence of polyphenol oxidase （PPO） , which is provided by bacteria in the water, and the illumination condition is the main factor that affects the activity of PPO, the change of pH in water sample plays a key role to occur the nuclcophilic addition reaction in the further development of the dimer quinone.

关 键 词：EGCG 消毒 色度 氧化聚合 

分 类 号：R123.6[医药卫生—环境卫生学]