King Abdulaziz City for Science and Technology-KACST, Nuclear Science Research Institute, National Center for Irradiation Technology, P. O. BOX 6086, Riyadh 11442, Saudi Arabia.
Ph.D. water treatment, Université de Poitiers.
J Hazard Mater. 2017 Apr 15;328:29-36. doi: 10.1016/j.jhazmat.2017.01.004. Epub 2017 Jan 5.
This study aims to gain new insight into phenol degradation and mineralization in aqueous solution using ionizing radiation to control its radiolytic elimination under various experimental conditions and to present the different radical reactions involved in water radiolysis. The most obvious finding of this study is that the combination of a reagent, i.e., O, HO, NO, O or SO, with γ-rays effectively enhances the radiolytic system for phenol degradation or mineralization. Radiolytic yield is higher with HO than with SO. For the γ-ray/free O, γ-ray/HO, γ-ray/SO, γ-ray/NO, and γ-ray/N systems, the absorbed doses for 90% phenol elimination are 1.7, 0.85, 1.65, 1.2, and 6.4kGy, respectively; in contrast, phenol can be decomposed totally and directly via reaction with molecular ozone. The lowest dose constant for phenol removal is determined for γ-ray/HCO. 89% of mineralization is reached for an absorbed dose of 10kGy with a γ-ray/SO combination.
本研究旨在利用电离辐射深入了解水溶液中苯酚的降解和矿化作用，以控制其在各种实验条件下的辐解消除，并介绍水辐解过程中涉及的不同自由基反应。本研究最明显的发现是，试剂（例如 O、HO、NO、O 或 SO）与γ射线结合可有效增强苯酚降解或矿化的辐解系统。HO 的辐解产率高于 SO。对于 γ 射线/自由 O、γ 射线/HO、γ 射线/SO、γ 射线/NO 和 γ 射线/N 系统，苯酚消除 90%所需的吸收剂量分别为 1.7、0.85、1.65、1.2 和 6.4kGy；相比之下，苯酚可直接与分子臭氧反应而完全分解。对于苯酚去除，γ 射线/HCO 的剂量常数最低。γ 射线/ SO 组合达到 10kGy 的吸收剂量时，矿化率达到 89%。
