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首页> 外文期刊>Ecological engineering: The Journal of Ecotechnology >Improvement in efficiency of lignin degradation by Fenton reaction using synergistic catalytic action
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Improvement in efficiency of lignin degradation by Fenton reaction using synergistic catalytic action

机译:利用协同催化作用通过芬顿反应提高木质素降解效率

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摘要

Lignin is a complex aromatic compound and a by-product from the wood pulping process. We used a central composite design to assess the efficiency of synergistic catalysts (Fe-0, Fe2+ and Fe3+) and H2O2 in the Fenton process for removal of lignin, aromatic compounds, and chemical oxygen demand (COD) from lignin solution. Results showed that the Fe-0 and H2O2 concentration were the most significant variables in lignin degradation by Fenton reaction, while Fe2+ and Fe3+ concentration were the next most important variables. The highest removal efficiencies were obtained with concentration levels of 7.61 mg/L Fe-0, 9.89 mg/L Fe2+, 14.27 mg/L Fe3+, and 376.88 mg/L H2O2 at pH 3.0 and 35 degrees C. Under these optimal conditions, the efficiencies of removal of lignin, aromatic compounds, and COD were 98.45%, 82.63%, and 100%, respectively, while the removal rates of lignin and aromatic compounds were 23.73 mg/L/h and 27.75 mg/L/h, respectively. The optimization results revealed that using synergistic catalysts in the Fenton reaction was more effective in treating wastewater and resulted in decreased cost and time. (C) 2015 Elsevier B.V. All rights reserved.
机译:木质素是一种复杂的芳香化合物,是木材制浆过程中的副产品。我们使用中央复合设计来评估Fenton工艺中从木质素溶液中去除木质素,芳香族化合物和化学需氧量(COD)的协同催化剂(Fe-0,Fe2 +和Fe3 +)和H2O2的效率。结果表明,Fe-0和H2O2浓度是Fenton反应降解木质素的最重要变量,而Fe2 +和Fe3 +浓度次之。在pH 3.0和35摄氏度下,浓度分别为7.61 mg / L Fe-0、9.89 mg / L Fe2 +,14.27 mg / L Fe3 +和376.88 mg / L H2O2时,去除效率最高。木质素,芳香族化合物和COD的去除率分别为98.45%,82.63%和100%,而木质素和芳香族化合物的去除率分别为23.73 mg / L / h和27.75 mg / L / h。优化结果表明,在Fenton反应中使用协同催化剂对废水的处理更为有效,并降低了成本和时间。 (C)2015 Elsevier B.V.保留所有权利。

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