Popova S A, Matafonova G G, Batoev V B
Laboratory of Engineering Ecology, Baikal Institute of Nature Management SB RAS, Ulan-Ude, Russia.
J Environ Sci Health A Tox Hazard Subst Environ Eng. 2023;58(1):39-52. doi: 10.1080/10934529.2023.2172270. Epub 2023 Feb 6.
Dual-wavelength ultraviolet (DWUV) irradiation can lead to a synergistic effect in terms of accelerated degradation of emerging organic contaminants in aqueous media. This study compared the kinetics of single-wavelength and DWUV degradation of bisphenol A (BPA) and bezafibrate (BZF) in model aqueous solution using KrCl (222 nm), XeBr (282 nm) excilamps and LED (365 nm). Three novel dual combinations (222 + 282, 222 + 365 and 282 + 365 nm) were examined toward the potential synergy in direct photolysis and advanced oxidation processes (AOPs) using potassium persulfate and hydrogen peroxide. Kinetic comparison showed that the time- and fluence-based synergy did not occur in the dual combinations selected. Meanwhile, the single-wavelength UV treatment using KrCl excilamp was found to be highly efficient for degradation of target contaminants. At a given dosage of oxidants, the UV/SO process exhibited higher performance than the UV/HO one, attaining higher degradation rates and requiring lower UV fluences for 90% removal. This study demonstrates that the catalyst-free UV/SO process using KrCl excilamp has a high potential for efficient removal of such organic contaminants from real waters with low turbidity.
双波长紫外线（DWUV）照射可在加速水介质中新兴有机污染物降解方面产生协同效应。本研究使用KrCl（222 nm）、XeBr（282 nm）准分子灯和LED（365 nm），比较了模型水溶液中双酚A（BPA）和苯扎贝特（BZF）的单波长和DWUV降解动力学。研究了三种新型双组合（222 + 282、222 + 365和282 + 365 nm）在使用过硫酸钾和过氧化氢的直接光解和高级氧化过程（AOPs）中的潜在协同作用。动力学比较表明，所选双组合中未出现基于时间和通量的协同作用。同时，发现使用KrCl准分子灯的单波长紫外线处理对目标污染物的降解非常有效。在给定的氧化剂剂量下，UV/S₂O₈过程比UV/H₂O₂过程表现出更高的性能，达到更高的降解率，并且90%去除所需的紫外线通量更低。本研究表明，使用KrCl准分子灯的无催化剂UV/S₂O₈过程在高效去除低浊度实际水体中的此类有机污染物方面具有很大潜力。
