紫外/臭氧工艺在水处理中的技术原理及研究进展

目前我国大量水资源受到不同程度的污染,难以通过常规水处理工艺去除的有机污染物如抗生素、内分泌干扰物、农药等对人类健康的潜在危害日益突出。大量研究表明,高级氧化工艺(AOPs)可产生强氧化性自由基高效去除水中大多数难降解有机污染物。紫外/臭氧(UV/O3)工艺作为一类新型、绿色的AOP,由于具有反应条件温和、氧化选择性可调控、反应速率快、操作简便、适用范围广等优点,近年来已成为水处理领域的研究热点。介绍了该工艺的主要反应机理、动力学及常用装置,概述了其在饮用水处理(微量污染物、天然有机物去除和消毒副产物控制)以及工业废水处理方面的研究进展,探讨了其经济可行性,并展望了其在水处理领域的应用前景。

Technical Principle and Research Progress of UV/O3 Process in Water Treatment

At present,a large number of water resources in China have been polluted to varying degrees. The potential threat of organic pollutants that are difficult to remove through conventional water treatment processes (e.g.,antibiotics,endocrine disruptors,and pesticides) to human health is becoming increasingly prominent. Many studies have demonstrated that advanced oxidation processes (AOPs) can generate highly oxidative radicals to effectively remove most of refractory organic pollutants in water.Ultraviolet/ozone (UV/O3) process,as a new and green AOP,has recently become a research hotspot in the field of water treatment because of its advantages of mild reaction conditions,adjustable oxidation selectivity,fast reaction rate,easy operation,and wide application range. This paper introduces the main reaction mechanism,kinetics and typical reactors of this process,summarizes its research progress in drinking water treatment (including micro-pollutants and natural organic matter removal,and disinfection by-products control) and industrial wastewater treatment, discusses its economic feasibility, and prospects its future application in water treatment.