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首页> 外文期刊>Chemosphere >Influence of electrochemical reduction and oxidation processes on the decolourisation and degradation of C.I. Reactive Orange 4 solutions
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Influence of electrochemical reduction and oxidation processes on the decolourisation and degradation of C.I. Reactive Orange 4 solutions

机译：电化学还原和氧化过程对C.I.的脱色和降解的影响活性橙4解决方案

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摘要

The electrochemical treatment of wastewaters from textile industry is a promising treatment technique for substances which are resistant to biodegradation. This paper presents the results of the electrochemical decolourisation and degradation of C.I. Reactive Orange 4 synthetic solutions (commercially known as Procion Orange MX2R). Electrolyses were carried out under galvanostatic conditions in a divided or undivided electrolytic cell. Therefore, oxidation, reduction or oxido-reduction experiences were tested. Ti/SNO_2-Sb-Pt and stainless steel electrodes were used as anode and cathode, respectively. Degradation of the dye was followed by TOC, total nitrogen, COD and BOD_5 analyses. TOC removal after an oxidation process was higher than after oxido-reduction while COD removal after this last process was about 90%. Besides, the biodegradability of final samples after oxido-reduction process was studied and an improvement was observed. UV-Visible spectra revealed the presence of aromatic structures in solution when an electro-reduction was carried out while oxido-reduction process degraded both azo group and aromatic structures. HPLC analyses indicated the presence of a main intermediate after the reduction process with a chemical structure closely similar to 2-amine-l, 5-naphthalenedisulfonic acid. The lowest decolourisation rate corresponded to electrochemical oxidation. In these experiences a higher number of intermediates were generated as HPLC analysis demonstrated. The decolourisation process for the three electrochemical processes studied presented a pseudo-first order kinetics.
机译：纺织工业废水的电化学处理是一种抗生物降解物质的有前途的处理技术。本文介绍了电化学脱色和C.I.降解的结果。活性橙4合成溶液（商业上称为Procion Orange MX2R）。在恒电流条件下，在分开的或未分开的电解池中进行电解。因此，测试了氧化，还原或氧化还原的经验。 Ti / SNO_2-Sb-Pt和不锈钢电极分别用作阳极和阴极。通过TOC，总氮，COD和BOD_5分析对染料进行降解。氧化过程后的TOC去除率高于氧化还原后的TOC去除率，而最后一步之后的COD去除率约为90％。此外，研究了最终样品在氧化还原后的生物降解性，并观察到了改进。紫外可见光谱揭示了当进行电还原时，溶液中存在芳族结构，而氧化还原过程同时降解了偶氮基和芳族结构。 HPLC分析表明，还原过程后存在主要中间体，其化学结构与2-胺-1，5-萘二磺酸非常相似。最低的脱色率对应于电化学氧化。在这些经验中，如HPLC分析所示，产生了更多的中间体。所研究的三个电化学过程的脱色过程呈现出伪一级动力学。

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  • 来源
    《Chemosphere》 |2009年第10期|1329-1337|共9页
  • 作者

    A.I. del Rio; J. Molina; J. Bonastre; F. Cases;

  • 作者单位

    Departamento de Ingenieria Textil y Papelera, Escuela Politecnica Superior de Alcoy, Universidad Politecnica de Valencia, Plaza Ferrdndiz y Carbonetl, s. 03801 Alcoy, Spain;

    Departamento de Ingenieria Textil y Papelera, Escuela Politecnica Superior de Alcoy, Universidad Politecnica de Valencia, Plaza Ferrdndiz y Carbonetl, s. 03801 Alcoy, Spain;

    Departamento de Ingenieria Textil y Papelera, Escuela Politecnica Superior de Alcoy, Universidad Politecnica de Valencia, Plaza Ferrdndiz y Carbonetl, s. 03801 Alcoy, Spain;

    Departamento de Ingenieria Textil y Papelera, Escuela Politecnica Superior de Alcoy, Universidad Politecnica de Valencia, Plaza Ferrdndiz y Carbonetl, s. 03801 Alcoy, Spain;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    DSA; electrochemical wastewater treatment; C.I. Reactive Orange 4; decolourisation; oxido-reduction;

    机译：DSA;电化学废水处理;C.I.活性橙4;脱色;氧化还原;

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