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首页> 外文期刊>Journal of Hazardous Materials >Optimization of the electro-Fenton and solar photoelectro-Fenton treatments of sulfanilic acid solutions using a pre-pilot flow plant by response surface methodology
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Optimization of the electro-Fenton and solar photoelectro-Fenton treatments of sulfanilic acid solutions using a pre-pilot flow plant by response surface methodology

机译：响应面法优化使用先导式流动装置对磺胺酸溶液进行电芬顿和太阳能芬顿处理

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摘要

A central composite rotatable design and response surface methodology were used to optimize the experimental variables of the electro-Fenton (EF) and solar photoelectro-Fenton (SPEF) degradations of 2.5 L of sulfanilic acid solutions in 0.05 M Na_2SO_4. Electrolyses were performed with a pre-pilot flow plant containing a Pt/air diffusion reactor generating H_2O_2. In SPEF, it was coupled with a solar photoreactor under an UV irradiation intensity of ca. 31 Wm~(-2(. Optimum variables of 100mAcm~(-2),0.5 mM Fe~(2+) and pH 4.0 were determined after 240 min of EF and 120 min of SPEF. Under these conditions, EF gave 47% of mineralization, whereas SPEF was much more powerful yielding 76% mineralization with 275 kWh kg"' total organic carbon (TOC) energy consumption and 52% current efficiency. Sulfanilic acid decayed at similar rate in both treatments following a pseudo-first-order kinetics. The final solution treated by EF contained a stable mixture of tartaric, acetic, oxalic and oxamic acids, which form Fe(Ⅲ) complexes that are not attacked by hydroxyl radicals formed from H_2O_2 and added Fe~(2+). The quick photolysis of these complexes by UV light of sunlight explains the higher oxidation power of SPEF. NH_4~+ was the main inorganic nitrogen ion released in both processes.
机译：采用中心复合材料可旋转设计和响应面方法优化了在0.05 M Na_2SO_4中2.5 L磺胺酸溶液的电芬顿（EF）和太阳光电芬顿（SPEF）降解的实验变量。用预试流工厂进行电解，该预试工厂包含产生H_2O_2的Pt /空气扩散反应器。在SPEF中，将其与太阳光反应器在紫外线照射强度约200℃下耦合。在EF 240分钟和SPEF 120分钟后，测定31 Wm〜（-2（。最佳变量为100mAcm〜（-2），0.5 mM Fe〜（2+）和pH 4.0。在这些条件下，EF给出47％相比之下，SPEF的功能更强大，在275 kWh kg“的总有机碳（TOC）能耗和52％的电流效率下，可产生76％的矿化作用。在两种处理中，磺胺酸的降解速率均接近拟一级动力学。EF处理的最终溶液包含酒石酸，乙酸，草酸和草酰胺酸的稳定混合物，形成Fe（Ⅲ）络合物，不受H_2O_2形成的羟基自由基的攻击，并添加Fe〜（2+）。日光紫外线对这些配合物的分析解释了SPEF的较高氧化能力，NH_4〜+是这两个过程中释放的主要无机氮离子。

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  • 来源
    《Journal of Hazardous Materials》 |2012年第30期|p.288-297|共10页
  • 作者

    Abdellatif El-Ghenymy; Sergi Garcia-Segura; Rosa Maria Rodriguez; EnricBrillas; Mohamed Soussi El Begrani; Ben Ali Abdelouahid;

  • 作者单位

    Laboratorid'Electroqutmica dels Materials i del Medi Ambient, Departament de Quimica Fisica, Facultat de Quimica, Universitat de Barcelona, Marti iFranques 1-11,08028 Barcelona,Spain,Dfyartement de Chimie, Faculte des Sciences, Universite Abdelmalek Essaadi, M'Hannech II B.P.2121, C.P. 93002 Tetouan, Morocco;

    Laboratorid'Electroqutmica dels Materials i del Medi Ambient, Departament de Quimica Fisica, Facultat de Quimica, Universitat de Barcelona, Marti iFranques 1-11,08028 Barcelona,Spain;

    Dfyartement de Chimie, Faculte des Sciences, Universite Abdelmalek Essaadi, M'Hannech II B.P.2121, C.P. 93002 Tetouan, Morocco;

    Laboratorid'Electroqutmica dels Materials i del Medi Ambient, Departament de Quimica Fisica, Facultat de Quimica, Universitat de Barcelona, Marti iFranques 1-11,08028 Barcelona,Spain;

    Dfyartement de Chimie, Faculte des Sciences, Universite Abdelmalek Essaadi, M'Hannech II B.P.2121, C.P. 93002 Tetouan, Morocco;

    Dfyartement de Chimie, Faculte des Sciences, Universite Abdelmalek Essaadi, M'Hannech II B.P.2121, C.P. 93002 Tetouan, Morocco;

  • 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);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    central composite rotatable design; electro-fenton; response surface methodology; solar photoelectro-fenton; sulfanilic acid;

    机译：中央复合旋转设计;电子芬顿响应面方法太阳光电子芬顿磺胺酸;

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