EGCG消毒过程中氧化聚合作用对色度的影响研究

发布时间：2018-06-06 17:06

本文选题：EGCG + 消毒　；参考：《环境工程》2017年06期

【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。
[Abstract]:In order to investigate the chromaticity of tea polyphenols in disinfection, the main composition of tea polyphenols, Epicatechin gallate EGCGG, was used as disinfectant under different conditions (dosage of disinfectant, contact time). The effect of EGCG oxidation polymerization on the chroma of water sample was tested. The results showed that the non-enzymatic oxidative polymerization was mainly affected by the dosage of EGCG and the pH of water sample. The way to influence the chroma was to control the amount of polymer by influencing the reaction equilibrium. The condition of enzymatic oxidative polymerization is the existence of polyphenol oxidase (PPO), the PPO can be provided by bacteria in water, and the light condition is the main factor affecting the activity of PPO. The change of pH in water sample plays a key role in the further nucleophilic addition reaction of dimer quinone.
【作者单位】：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;北京兴创投资有限公司;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;
【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)
【分类号】：R123.6

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