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Treatment of real benzene dye intermediates wastewater by the Fenton method: characteristics and multi-response optimization

机译：FENTON法处理真正的苯染料中间体废水：特征和多响应优化

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摘要

Benzene dye intermediates (BDI) wastewater has caused major environmental concern due to its potential carcinogenic, teratogenic, and mutagenic effects. Treatability reports dealing with the advanced chemical oxidation of BDI are limited. In this work, the Fenton method was applied to treat the real BDI wastewater to provide a deep insight into single as well as combinative effects of the main process variables influencing the treatment performance. First, we evaluated the effects of the reaction time, initial pH, initial [H2O2] concentration, and initial [Fe2+] concentration on the Fenton oxidation efficiency of real BDI wastewater. Furthermore, based on the Box-Behnken response surface methodology (RSM), an empirical mathematical model between response values, namely the chemical oxygen demand (COD), total organic carbon (TOC), color removal efficiency, sludge iron mass ration (SIMR), and influence factors were established to evaluate the interaction effects and optimize the experimental conditions. All of the proposed models were adequate with an R-2 range from 0.9561 to 0.9880. In addition, three of these factors had different effects on four studied response values. By overlaying the responses, the optimum conditions were obtained at an initial pH of 4.13, an initial [H2O2] concentration of 1.0 M, and an initial [Fe2+] concentration of 0.36 M. Verification experiments were conducted at the optimum conditions, which led to a COD removal efficiency of 85.29%, a TOC removal efficiency of 75.23%, a color removal efficiency of 99.99%, and a SIMR response of 0.39, respectively, and the results were in good agreement with the values predicted by the model. In addition, the BOD5/COD ratio was observed to increase from 0.08 to 0.49, indicating an improvement in biodegradability.
机译：苯染料中间体（BDI）废水引起了由于其潜在的致癌，致畸和致突效应引起的主要环境问题。处理BDI先进化学氧化的处理报告是有限的。在这项工作中，应用FENTON方法来治疗真实的BDI废水，以便对单一的洞察力提供深入的洞察，以及影响治疗性能的主要过程变量的组合效果。首先，我们评估了反应时间，初始pH，初始[H 2 O 2]浓度和初始[Fe2 +]浓度对真实BDI废水的芬顿氧化效率的影响。此外，基于Box-Behnken响应表面方法（RSM），响应值之间的经验数学模型，即化学需氧量（COD），总有机碳（TOC），色彩去除效率，污泥铁质量（SIMR）建立了影响因素，以评估相互作用效应并优化实验条件。所有拟议的模型都足以使R-2的范围为0.9561至0.9880。此外，这些因素中的三种对四个研究的响应值产生了不同的影响。通过重叠回应，在4.13的初始pH下获得最佳条件，初始浓度为1.0μm，初始[Fe2 +]浓度为0.36米。验证实验在最佳条件下进行，这导致COD去除效率为85.29％，TOC去除效率为75.23％，颜色去除效率为99.99％，分别为0.39的SIMR响应，结果与模型预测的值吻合良好。此外，观察到BOD5 / COD比率从0.08增加到0.49，表明生物降解性的提高。

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  • 来源
    《RSC Advances》 |2018年第1期|共11页
  • 作者

    Guo Ying; Xue Qiang; Zhang Huanzhen; Wang Ning; Chang Simiao; Wang Hui; Pang Hao; Chen Honghan;

  • 作者单位

    China Univ Geosci Beijing Key Lab Water Resources &

    Environm Engn Sch Water Resources &

    Environm Beijing 100083 Peoples R China;

    China Univ Geosci Beijing Key Lab Water Resources &

    Environm Engn Sch Water Resources &

    Environm Beijing 100083 Peoples R China;

    China Univ Geosci Beijing Key Lab Water Resources &

    Environm Engn Sch Water Resources &

    Environm Beijing 100083 Peoples R China;

    China Univ Geosci Beijing Key Lab Water Resources &

    Environm Engn Sch Water Resources &

    Environm Beijing 100083 Peoples R China;

    China Univ Geosci Beijing Key Lab Water Resources &

    Environm Engn Sch Water Resources &

    Environm Beijing 100083 Peoples R China;

    China Univ Geosci Beijing Key Lab Water Resources &

    Environm Engn Sch Water Resources &

    Environm Beijing 100083 Peoples R China;

    Beijing ZDHK Environm Sci &

    Technol Co Ltd Beijing 100120 Peoples R China;

    China Univ Geosci Beijing Key Lab Water Resources &

    Environm Engn Sch Water Resources &

    Environm Beijing 100083 Peoples R China;

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  • 正文语种 eng
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