Université Clermont Auvergne, CNRS, SIGMA Clermont, Institut de Chimie de Clermont-Ferrand, F-63000 Clermont-Ferrand, France; School of the Environment, Guangxi University, Nanning 530004, China.
Université Clermont Auvergne, CNRS, SIGMA Clermont, Institut de Chimie de Clermont-Ferrand, F-63000 Clermont-Ferrand, France.
J Hazard Mater. 2018 Apr 5;347:279-287. doi: 10.1016/j.jhazmat.2018.01.006. Epub 2018 Jan 4.
In the present work we investigate the activation efficiency of HO and SO using UVA and UVB radiation. Bisphenol-A (BPA) is used as model pollutants to estimate the oxidative process efficiency in simulated and real sewage treatment plant waters. Particular attention is paid to the BPA removal efficiency and to the radical mechanism involvement considering the effect of typical inorganic water constituents (carbonates and chloride ions) and organic matter. Despite a detrimental effect observed when carbonate ions are in solution using both hydrogen peroxide and persulafate, the presence of high chloride ions concentration was found to improve BPA removal using SO as radical precursor. This enhancement, investigated combining chemical kinetic model approach and laser flash photolysis experiments, is attributed to the formation of hydroxyl radical and chlorine radical species from sulfate radical. Different transformation products are identified by means of GC-MS and HPLC-MS analyses. Moreover, experiments using sewage treatment plant water (STPW) spiked with BPA are performed in order to assess the efficiency of oxidative processes in a simulated treatment systems activated using UVA + UVB radiations.
在本工作中，我们研究了 UVA 和 UVB 辐射对 HO 和 SO 的激活效率。双酚 A（BPA）被用作模型污染物，以估计模拟和实际污水处理厂水中氧化过程的效率。特别关注 BPA 的去除效率和自由基机制的参与，同时考虑典型无机水成分（碳酸盐和氯离子）和有机物的影响。尽管在使用过氧化氢和过硫酸盐时观察到碳酸根离子存在时会产生不利影响，但发现高浓度的氯离子浓度有利于使用 SO 作为自由基前体去除 BPA。这种增强作用通过化学动力学模型方法和激光闪光光解实验相结合进行了研究，归因于硫酸盐自由基形成羟基自由基和氯自由基。通过 GC-MS 和 HPLC-MS 分析鉴定了不同的转化产物。此外，还使用含有 BPA 的污水处理厂水（STPW）进行实验，以评估在使用 UVA+UVB 辐射激活的模拟处理系统中氧化过程的效率。
