摘要
以偶氮染料橙黄Ⅱ为对象,研究Fenton反应和紫外光辐射条件下,废水初始pH值、H_2O_2浓度、Fe^(2+)浓度及反应物初始浓度对橙黄Ⅱ脱色效果的影响。结果表明,紫外光与Fenton试剂有明显协同作用,以紫外灯UV_(254)为光源,橙黄Ⅱ质量浓度20 mg/L、pH=3.0、H_2O_2浓度0.2 mmol/L、Fe^(2+)浓度0.04 mmol/L、反应40 min条件下,橙黄Ⅱ的脱色率为95%,比传统Fenton试剂的脱色率提高了l5%。本研究为实际染料废水的治理提供了一种新方法。
The present paper is aimed to introduce our study of the degradation of Orange Ⅱ by means of UV/Fenton. As is known, Or- ange Ⅱ is a kind of permanent and non-degradable dye while UV/ Fenton is a combination of Fenton reagent with UV light, which can be used as an efficient method for wastewater treatment. Therefore, we have investigated the effects of H2O2 concentration, Fe^2＋ concentration, pH value, and the initial concentration of Orange Ⅱ on the degradation of Orange Ⅱ in the process of UV/Fenton combined. The experimental results of our investigation show that a removal efficiency of Orange II tends to be as high as about 95 % under the optimal condition with 20 mg/L of initial dye mass concentration during a period of 40 min reaction time. Furthermore, the removal efficiency of Orange Ⅱ can be heightened by about 15% by way of UV/Fenton combination than by using Fenton alone. However, during the degradation experiments, the usage of H2O2 and Fe^2＋ need to be kept at proper concentrations. Otherwise, they would reduce the degradation efficiency. Besides, the initial pH value seems to have a great effect on the Orange Ⅱ removal efficiency during the process. Under the acidic condition, the degradation efficiency would be higher with the optimum condition of the degradation being H2O2 0.2 mmol/L, Fe^2＋ 0.04 mmol/L and pH = 3. Further studies are likely to be focused on the preliminary mechanism about the degradation of Orange Ⅱ by UV/ Fenton. During the degradation process, CODCr can be removed effectively at the same time. According to the UV - Vis spectral analysis, Orange Ⅱ could be degraded into kinds of simple molecules.
出处
《安全与环境学报》
CAS
CSCD
北大核心
2009年第3期7-10,共4页
Journal of Safety and Environment
基金
福建省光催化重点实验室-省部共建国家重点实验室培育基地基金项目(K-081006)
福建省高等学校新世纪优秀人才支持计划(ZY2006-19)
