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首页> 外文期刊>Environmental Science & Technology >Immobilized Redox Mediators on Anion Exchange Resins and Their Role on the Reductive Decolorization of Azo Dyes
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Immobilized Redox Mediators on Anion Exchange Resins and Their Role on the Reductive Decolorization of Azo Dyes

机译：阴离子交换树脂上固定化氧化还原介体及其在偶氮染料还原脱色中的作用

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摘要

Quinoid redox mediators (RM), including 1,2-naphthoquinone-4-sulfonate (NQS) and anthraquinone-2,6-disulfonate (AQDS), were adsorbed on anion exchange resins (AER) in order to explore their catalytic effects on the reductive decolorization of azo dyes by anaerobic granular sludge. Immobilized quinones preserved their catalytic properties once adsorbed on the surface of AER. Addition of different concentrations of immobilized quinones to sludge incubations increased up to 8.8-fold the rate of decolorization of azo dyes compared to controls lacking quinones. The catalytic effects of immobilized quinones also resulted in a greater extent of decolorization in quinone-amended incubations compared to controls lacking external RM. Spectrophotometric screening did not show any detachment of either AQOS or NQS during decolorization assays confirming that the enhanced decolorization accomplished was exclusively attributed to quinones immobilized on AER. Sterile controls including the maximum concentration of immobilized quinones supplied (4.8 mM) did not show any removal of azo dyes suggesting that physical-chemical processes, such as adsorption or chemical reduction, were not responsible for the enhanced decolorization reached. To our knowledge, this is the first study demonstrating the catalytic contribution of RM immobilized on AER on the reductive (bioltransformation of azo dyes.
机译：醌类氧化还原介体（RM）被吸附在阴离子交换树脂（AER）上，包括1,2-萘醌-4-磺酸盐（NQS）和蒽醌-2,6-二磺酸盐（AQDS），以探讨它们对二甲氧基苯酚的催化作用。厌氧颗粒污泥对偶氮染料的还原脱色。固定在醌上的醌一旦被吸附在AER的表面上便保持了其催化性能。与缺乏醌的对照相比，向污泥培养液中添加不同浓度的固定醌可提高偶氮染料的脱色速率至8.8倍。与缺乏外部RM的对照相比，固定化醌的催化作用还导致在醌修饰的培养中更大程度的脱色。分光光度筛选在脱色测定过程中未显示AQOS或NQS有任何分离，这证实了完成的增强脱色完全归因于固定在AER上的醌。包括最大浓度固定的醌（4.8 mM）在内的无菌对照未显示出偶氮染料的任何去除，这表明物理化学过程（例如吸附或化学还原）与达到的脱色增强无关。据我们所知，这是首次证明固定在AER上的RM对偶氮染料的还原（生物转化）的催化作用。

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  • 来源
    《Environmental Science & Technology》 |2010年第5期|p.1747-1753|共7页
  • 作者

    FRANCISCO I. CERVANTES; rnALBERTO GARCIA-ESPINOSA; rnM. ANTONIETA MORENO - REYNOSA; rnJ. RENE RANGEL-MENDEZ;

  • 作者单位

    Division de Ciencias Ambientales, Institute Potosino de Investigacion Cientlfica y Tecnologica (IPICyT), Camino a la Presa San Jose 2055, Col. Lomas 4~a. Section, San Luis Potosi, SLP, 78216 Mexico;

    Division de Ciencias Ambientales, Institute Potosino de Investigacion Cientlfica y Tecnologica (IPICyT), Camino a la Presa San Jose 2055, Col. Lomas 4~a. Section, San Luis Potosi, SLP, 78216 Mexico;

    Division de Ciencias Ambientales, Institute Potosino de Investigacion Cientlfica y Tecnologica (IPICyT), Camino a la Presa San Jose 2055, Col. Lomas 4~a. Section, San Luis Potosi, SLP, 78216 Mexico;

    Division de Ciencias Ambientales, Institute Potosino de Investigacion Cientlfica y Tecnologica (IPICyT), Camino a la Presa San Jose 2055, Col. Lomas 4~a. Section, San Luis Potosi, SLP, 78216 Mexico;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
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