超声/Cu2+/H2O2降解废水中亚甲基蓝的效能及机理OA
Efficiency and Mechanism of Ultrasound/Cu2+/H2O2 Degradation of Methylene Blue in Wastewater
采用超声(US)/Cu2+/H2O2 氧化体系降解废水中的亚甲基蓝(MB),系统考察了氧化体系、pH、Cu2+浓度、H2O2 浓度及 US 时间对废水中 MB 去除的影响,并探究了该体系的反应机理.实验结果表明,单因素条件下最佳处理效果的条件为pH=5.5,Cu2+浓度为 0.20 mmol/L,H2O2 浓度为 0.020 mol/L,US 时间为 90 min.通过正交实验得出影响处理效果的最主要因素为 H2O2 浓度,其次是 US 时间,再者是 Cu2+浓度.基于自由基捕获和光谱分析实验,推导了(US)/Cu2+/H2O2 体系降解MB 的反应机理.US 空化效应协同 Cu2+催化 H2O2 分解产生羟基自由基(·OH)和超氧自由基(·O2-)攻击 MB 分子,破坏其发色基团和芳香环结构,实现对 MB 的高效降解.
The degradation of methylene blue(MB)in wastewater was investigated using an ultrasound(US)/Cu2+/H2O2 oxidation system.The effects of the oxidation system,pH,Cu2+concentration,H2O2 concentration,and US time on MB removal were systematically examined,and the reaction mechanism of this system was explored.The experimental results indicate that the optimal conditions for treatment under single-factor conditions are pH=5.5;Cu2+concentration of 0.20 mmol/L;H2O2 concentration of 0.020 mol/L;and US time of 90 min.Orthogonal experiments revealed that H2O2 concentration is the primary factor influencing treatment efficacy,followed by US duration and Cu2+concentration.Based on the experiments of free radical capture and spectral analysis,the reaction mechanism of MB degradation in US/Cu2+/H2O2 system was deduced.The synergistic effect of US cavitation and Cu2+catalysis on H2O2 decomposition produces hydroxyl radicals(·OH)and superoxide radicals(·O2-)that attack MB molecules,disrupt their chromophores and aromatic ring structures,and achieve efficient degradation of MB.
陈炳坚;谢文玉;王怡怡;殷旭东
广东石油化工学院 环境科学与工程学院,广东 茂名 525000广东石油化工学院 环境科学与工程学院,广东 茂名 525000广东石油化工学院 环境科学与工程学院,广东 茂名 525000广东石油化工学院 环境科学与工程学院,广东 茂名 525000
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超声Cu2+/H2O2氧化体系亚甲基蓝降解机理
ultrasoundCu2+/H2O2 oxidation systemmethylene bluedegradation mechanism
《广东石油化工学院学报》 2026 (3)
19-25,7
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