摘要
采用基于自由基催化的高级氧化技术,将紫外光化学反应体系和新兴氧化剂过氧乙酸耦合,对水厂尾水中的难降解污染物进行了深度处理效能与机制上的研究。揭示了PAA光解和UV/PAA体系降解污染物的一阶反应动力学规律,以高量子产率和优秀的降解反应速率常数;从PAA活化自由基角度出发,量化分析了污染物降解贡献度,给出了UV/PAA体系反应机制。证实了UV/PAA深度处理水厂尾水的可行性和优越性,为实践工艺设计提供了重要的理论依据。
The advanced oxidation technology based on free radical catalysis is used,and the ultraviolet photochemical reaction system is coupled with the emerging oxidant peracetic acid,and the advanced treatment efficiency and mechanism of the refractory pollutants in the tail water of water plants are studied.The first-order reaction kinetics of PAA photolysis and UV/PAA system degradation of pollutants are revealed,with high quantum yield and excellent degradation reaction rate constant;from the perspective of PAA activated radicals,the contribution of pollutant degradation is quantitatively analyzed The reaction mechanism of UV/PAA system is given.Confirms the feasibility and superiority of UV/PAA advanced treatment of water plant tail water,and provides an important theoretical basis for practical process design.
作者
王尔东
Wang Erdong(School of Resources and Environment,Lanzhou University,Lanzhou 730000,China)
出处
《科学技术创新》
2022年第31期37-40,共4页
Scientific and Technological Innovation
关键词
过氧乙酸
自由基
水厂尾水
污染物降解
peracetic acid
free radicals
water plant tail water
pollutant degradation
