Advanced Oxidation Process (AOP) for Detoxification of Acid Red 17 Dye Solution and Degradation Mechanism
Advanced Oxidation Process (AOP) for Detoxification of Acid Red 17 Dye Solution and Degradation Mechanism
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DOI：
10.1007/s40710-018-0284-9
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发表时间：
2018-03-01
影响因子：
4.4
通讯作者：
Madkour, Fedekar F.
中科院分区：
文献类型：
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作者：
El Nemr, Ahmed;Hassaan, Mohamed A.;Madkour, Fedekar F.
本文采用HPLC-MS/MS技术研究了酸性红17染料（AR-17）的降解机理，并探讨了臭氧和紫外光联合应用于AR-17染料废水的可行性。考察了pH值、染料初始浓度、处理时间等因素对降解效果的影响，确定了最佳降解条件。染料初始浓度和溶液pH是影响脱色的参数，pH 11时脱色率最大。在O-3/UV处理25分钟后（对于100 ppm染料浓度）发生100%的颜色去除。AR-17染料去除的动力学分析遵循伪一级动力学。当紫外线（UV）与臭氧同时作用时，一级反应速率常数k（dx[O3]l）增大，染料浓度为500 ppm时脱色时间缩短至5.5 min。在预处理期间和预处理结束时对预处理染料溶液进行的GC-MS和HPLC-MS/MS研究显示AR-17染料完全降解。实验结果还表明，UV-臭氧处理工艺降低了AR-17染料废水对浮游动物的毒性。
This work investigates the degradation mechanism of Acid Red 17 dye (AR-17) using HPLC-MS/MS as well as it studies the feasibility of applying ozone and ultraviolet to detoxify the wastewater containing AR-17 dye. Different parameters such as pH, initial dye concentration and treatment time were evaluated to obtain the optimal degradation conditions. The initial dye concentration and solution pH were the parameters which affected the color removal and the maximum decolorization was obtained at pH 11. A 100% color removal took place after 25 min of O-3/UV treatment (for 100 ppm dye concentration). Kinetic analyses of AR-17 dye removal followed the pseudo-first-order kinetics. When ultraviolet (UV) was applied with ozone simultaneously, the first-order rate constant (k(dx[O3]l)) increased and the time of dye decolorization shortened to 5.5 min for 500 ppm dye concentration. GC-MS and HPLC-MS/MS studies of pre-treated dye solution which were performed during and at the end of the pre-treatment time, showed complete degradation of the AR-17 dye. The obtained results also demonstrated that the UV-ozone treatment process decreased the zooplankton toxicity of the treated AR-17 dye wastewater.