【摘要】 比较UV/ClO₂和UV/Cl₂这2种新型高级氧化技术降解水中卡马西平（CBZ）的效果与作用机理，深入探讨氧化剂投加量、溶液pH值和共存离子（Cl^-离子和HCO₃^-离子）等因素对CBZ降解效果的影响.结果表明：当氧化剂投加量从30μmol/L增加到80μmol/L,CBZ的降解效率可分别提高27.3%和51.5%,达到81.6%和62.9%;较低的pH值（pH=6）有利于UV/Cl₂降解CBZ,而UV/ClO₂降解CBZ受pH值的影响较小；共存HCO₃^-离子对2种体系降解CBZ均有较大的抑制作用，而共存Cl^-离子仅对UV/ClO₂体系有明显的抑制作用.高级氧化的关键是自由基氧化，文章探讨2种体系降解CBZ时各种自由基的降解贡献率.结果表明：2种体系下降解CBZ贡献率最高的都是氯自由基（RCS）,其次是UV/Cl₂体系中的·OH,UV的贡献率最低；而UV/ClO₂体系中·OH的贡献率最低.最后，对这2种体系下CBZ的降解产物与降解路径进行分析.更多还原

【Abstract】 The degradation of carbamazepine（CBZ） by UV/Cl₂ and UV/ClO₂ system is investigated. The effect of oxidant dosage, pH, inorganic anions（Cl^- and HCO₃^-） are also evaluated in two system. When the dosage of oxidant from 30 μmol/L increases to 80 μmol/L, CBZ degradation percent increases 27.3% and 51.5%, reaching 81.6% and 62.9% respectively in UV/Cl₂ and UV/ClO₂ system. Lower pH value（pH=6） is beneficial to CBZ degradation in UV/Cl₂ systems, while there is no obvious effect in UV/ClO₂ system. The presence of HCO₃^- in different concentrations has negative effect on CBZ removal in both systems, while Cl^- only affects UV/ClO₂ system. The calculation of free radical contribution is investigated in both systems. Reactive chlorine species（RCS） has the highest contribution to the degradation of CBZ in both systems, the second is ·OH in UV/Cl₂ system and UV-light in UV/ClO₂ system. The degradation products and path of CBZ is analyzed in both systems.更多还原