NaClO-PMS及NaClO-O3协同活化降解印染废水

Degradation of printing and dyeing wastewater by synergistic activated NaClO-PMS or NaClO-O3

摘要:

将次氯酸钠(NaClO)分别与过硫酸氢钾(Peroxymonosulfate, PMS)和臭氧(O3)协同活化，用于处理模拟印染废水，以罗丹明B (Rhodamine B, RhB)、活性艳蓝(Reactive Brilliant Blue, Knr)、活性艳红(Reactive Red,X-3B)、甲基橙(Methyl Orange, MO)等染料的降解率为指标，采用紫外-可见吸收光谱分析测试法，探讨其物质的量的比例、pH值及废水中Cl-、NO3-、SO42-、HCO3-等因素的影响。结果表明：NaClO-PMS及NaClO-O3体系最佳物质的量的比例分别为n(NaClO):n(PMS)=1:1，n(NaClO):n(O3)=2:3，分别在pH值为3-11、3-9时对模拟印染废水具有较好的降解效果，NaClO-PMS体系在酸性条件下降解RhB效果较好，pH=3时可达到96.18%；NaClO-O3体系在中性条件下对RhB的降解效果较好，pH=7时为97.91%；阴离子对NaClO-PMS及NaClO-O3体系处理印染废水的影响均较小。

Abstract:

Sodium hypochlorite (NaClO) was synergistically activated with Peroxymonosulfate (PMS) and ozone (O3) to treat simulated printing and dyeing wastewater. The indicators are the degradation rates of dyes such as Rhodamine B (RhB), Reactive Brilliant Blue (Knr), Reactive Red (X-3B), and Methyl Orange (MO). UV-visible absorption spectroscopy analysis method is used to explore the influence of factors such as the ratio of material mass, pH, Cl-, NO3-, SO42-, and HCO3- in wastewater. The results show that the ratio of the optimum mass of NaClO-PMS and NaClO-O3 systems are n(NaClO): n(PMS)=1:1 and n(NaClO):n(O3)=2:3, which have good degradation of RhB at the pH of 3-11 and 3-9, respectively. The NaClO-PMS system has better degradation of RhB under acidic conditions, the degradation rate reaches 96.18% at pH=3. The NaClO-O3 system has a good degradation effect on RhB under the neutral pH con-dition, and the degradation rate reaches 97.91% at pH=7. The concentration of anions have a little influ-ence on the treatment effect of printing and dyeing wastewater by NaClO-PMS or NaClO-O3 system.