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首页> 外文期刊>Catalysis Communications >Azo and anthraquinone dye decolorization in relation to its molecular structure using soluble Trichosanthes dioica peroxidase supplemented with redox mediator
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Azo and anthraquinone dye decolorization in relation to its molecular structure using soluble Trichosanthes dioica peroxidase supplemented with redox mediator

机译：使用可溶性氧化亚砜和二氧化ica过氧化物酶并辅以氧化还原介体，使偶氮和蒽醌染料脱色与其分子结构有关

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摘要

In this study we investigated the decolorizing ability of Trichosanthes dioica-derived soluble peroxidase on structurally complex azo and anthraquinone dyes in the presence of redox mediators. Our results show that riboflavin acted as a better redox mediator than antraquinone-2, 6-disulfonate (AQDS). Riboflavin served as an efficient electron transferor than AQDS in the reduction of azo dyes, by contrast with anthraquinone dyes. Although the extent of decolorization (expressed as percent dye decolorization) varied from one dye to the other, maximum decolorization was achieved for the case when suspensions containing 0.45 EU (Enzyme Units)/ml and 0.2 mM riboflavin at pH 5.0 were incubated for 2 h at 40 °C. Redox mediator supplementation remarkably improved the decolorizing potential of T. dioica peroxidase. Azo dyes exhibited higher decolorization as compared to anthraquinone dyes in the presence of riboflavin. On the contrary, percent decolorization in the absence of redox mediators was inadequate and slow. Redox mediators studied herein facilitated decolorization of stable anthraquinone dyes. Therefore, the effect of redox mediators on T. dioica peroxidase-dye decolorization is affected by stability, thus the molecular structure.
机译：在这项研究中，我们研究了在氧化还原介体存在下，天花粉的二恶英衍生物可溶性过氧化物酶对结构复杂的偶氮和蒽醌染料的脱色能力。我们的研究结果表明，核黄素比6-二磺酸蒽醌2（AQDS）更好地充当氧化还原介质。与蒽醌染料相比，核黄素在还原偶氮染料方面比AQDS更有效。尽管脱色程度（表示为染料脱色百分数）因一种染料而异，但将含有0.45 EU（酶单位）/ ml和0.2 mM核黄素的pH 5.0的悬浮液孵育2小时，可实现最大脱色在40°C下。氧化还原介体的添加显着提高了T. dioica过氧化物酶的脱色能力。与在核黄素存在下的蒽醌染料相比，偶氮染料显示出更高的脱色。相反，在没有氧化还原介体的情况下脱色百分率不足且缓慢。本文研究的氧化还原介体促进了稳定的蒽醌染料的脱色。因此，氧化还原介质对T. dioica过氧化物酶-染料脱色的作用受稳定性的影响，因此受分子结构的影响。

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