镁离子强化UV/PMS体系降解染料的探究

用酸性橙7(AO7)模拟染料废水,探究了Mg~(2+)对UV/PMS体系降解染料废水的强化作用,及其影响因素和主要氧化物种。实验结果表明,Mg~(2+)的加入会显著增强UV/PMS体系的氧化能力。底物浓度与AO7的降解效果成负相关;PMS投量、Mg~(2+)投量和紫外灯功率与AO7的降解效果成正相关;pH的升高对该体系起到一定的抑制作用。Mg~(2+)/UV/PMS体系主要氧化物种是硫酸根自由基(SO4·-)和少量羟基自由基(·OH)。

Investigation of enhancement of magnesium ions on the degradation of dyeing wastewater by UV/PMS system

Acid orange 7(AO7)simulated dyeing wastewater has been used for investigating the enhancement effect of Mg2+on the degradation of dyeing wastewater by UV/PMS system ,and its influencing factors and main oxidant species. The experimental results show that the addition of Mg2+ can strongly enhance the oxidation capability of UV/PMS system. Substrate concentration has negative correlation with the degradation effect of AO7,while PMS dosage,Mg2+dosage and the power of UV light have positive correlation with the degradation effects of AO7. The increase of pH has certain inhibition effect on the system. The main oxidation species of Mg 2+/UV/PMS are sulfate radical(SO4·-)and hydroxyl radical(·OH).