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首页> 外文期刊>Applied radiation and isotopes: including data, instrumentation and methods for use in agriculture, industry and medicine >Decoloration and degradation of Reactive Red-120 dye by electron beam irradiation in aqueous solution.
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Decoloration and degradation of Reactive Red-120 dye by electron beam irradiation in aqueous solution.

机译：水溶液中电子束照射对活性Red-120染料的脱色和降解。

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摘要

The decoloration and degradation of aqueous solution of the reactive azo dye viz. Reactive Red-120 (RR-120) was carried out by electron beam irradiation. The change in decoloration percentage, removal of chemical oxygen demand (COD) and total organic carbon (TOC), solution pH and five-day biochemical oxygen demand (BOD(5)) were investigated with respect to the applied dose. However, the concentration of the dye in the solution showed a great influence on all these observables. During the radiolysis process, it was found that the decoloration of dye was caused by the destruction of the chromophore group of the dye molecule, whereas COD and TOC removal were depended on the extent of mineralization of the dye. The decrease in pH during the radiolysis process indicated the fragmentation of the large dye molecule into smaller organic components mostly like smaller organic acids. The BOD(5)/COD ratio of the unirradiated dye solution was in the range of 0.1-0.2, which could be classified as non-biodegradable wastewater. However, the BOD(5)/COD ratio increased upon irradiation and it indicated the transformation of non-biodegradable dye solution into biodegradable solution. This study showed that electron beam irradiation could be a promising method for treatment of textile wastewater containing RR-120 dye.
机译：反应性偶氮染料的水溶液脱色和降解。反应性红120（RR-120）通过电子束照射进行。考察了脱色率，化学需氧量（COD）和总有机碳（TOC）的去除，溶液pH值和五天生化需氧量（BOD（5））的变化。然而，溶液中染料的浓度对所有这些可观察到的事物都显示出很大的影响。在辐射分解过程中，发现染料的脱色是由染料分子发色团的破坏引起的，而COD和TOC的去除取决于染料的矿化程度。辐射分解过程中pH值的降低表明大染料分子破碎成较小的有机组分，大部分是较小的有机酸。未经辐照的染料溶液的BOD（5）/ COD比在0.1-0.2的范围内，可以归类为不可生物降解的废水。然而，BOD（5）/ COD的比例随着照射而增加，这表明不可生物降解的染料溶液转变为可生物降解的溶液。这项研究表明，电子束辐照可能是处理含RR-120染料的纺织品废水的一种有前途的方法。

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