Degradation product distribution of Reactive Red-147 dye treated by UV/H2O2/TiO2 advanced oxidation process
Degradation product distribution of Reactive Red-147 dye treated by UV/H2O2/TiO2 advanced oxidation process
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DOI：
10.1016/j.jmrt.2020.01.062
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发表时间：
2020-05-01
影响因子：
6.4
通讯作者：
Zia-ur-Rehman, M.
中科院分区：
文献类型：
--
作者：
Arshad, R.;Bokhari, T. H.;Zia-ur-Rehman, M.
工业废水中染料的存在是公共卫生问题。水环境中染料的去除受到了广泛的关注。研究了过氧化氢（H2 O2）和纳米光催化剂（TiO 2）对活性红（RR-147）的紫外光降解作用。研究了染料浓度、pH值、H2 O2、紫外光照射时间和TiO 2等参数对染料降解的影响。当染料浓度为50 ppm、pH值为3.4、H2 O2为0.9 mL、TiO 2为0.6 g、紫外光照射时间为60 min时，染料的最大降解率为92%。使用UV/维斯分光光度计来研究UV照射后吸光度的变化。在优化条件下，UV/H2 O2/TiO 2处理染料水溶液，COD去除率达到57%。采用FTIR对紫外辐照处理后的降解产物进行了鉴定。FTIR研究表明，经UV/H2 O2/TiO 2处理后，大部分官能团峰消失。LCMS/GCMS分析仔细检查了中间体，并提出了机械降解途径。采用溶血试验评估辐照染料样品的细胞毒性，同时在处理前后采用艾姆斯试验进行致突变性评价。结果表明，UV/H_2O_2/TiO_2体系比UV/H_2O_2体系更能有效地降解RR-147染料。(C)2020年，任作家。由爱思唯尔公司出版
The presence of dyes in industrial effluents is of public health concern. A considerable attention was paid to remove the dyes from the aquatic environment. This study focusses on the degradation of reactive red (RR-147) dye under UV irradiation in the presence of hydrogen peroxide (H2O2) and nano photo catalyst (TiO2). Effect of different parameters like dye concentration, pH, H2O2, UV irradiation time and TiO2 was studied. The maximum degradation of 92% for 50 ppm dye concentration, pH 3.4, H2O2 0.9 mL, TiO2 0.6 g and UV irradiation time 60 min was observed. The UV/Vis spectrophotometer was used to investigate the change in absorbance after UV irradiation. The 57 % reduction in COD was achieved when the dye aqueous solution was exposed to UV/H2O2/TiO2 process under optimized conditions. The FTIR was used for the identification of degraded product after UV irradiation treatment. The FTIR study showed that most of the functional group peaks were disappeared after the UV/H2O2/TiO2 treatment. LCMS/GCMS analyses scrutinized the intermediates and a mechanistic degradation pathway has also been proposed. The cytotoxicity of the irradiated dye samples was assessed using hemolytic test while mutagenic evaluation was carried out using the Ames test before and after treatment. The UV/H2O2/TiO2 is proved to be more capable and efficient system for the degradation of the RR-147 dye as compared to UV/H2O2 alone. (C) 2020 The Authors. Published by Elsevier B.V.