4种常用铁基材料非均相芬顿降解四环素的研究

A Study of Four Iron-Based Materials for Heterogeneous Fenton Degradation of Tetracycline

  • 摘要: 非均相芬顿法能够很好地应用于含抗生素废水的处理。为了筛选出成本低廉且能快速有效的非均相芬顿催化剂,本文对比了Fe0、Fe3O4、Fe2O3、-FeOOH四种常见非均相催化剂对四环素的去除效果。通过X-射线粉末衍射仪(XRD)、比表面积分析仪(BET)、激光粒度仪(LDI)分析了四种材料的理化特性。通过探究四种材料投加量、双氧水投加量、反应体系初始pH的影响选择最佳反应条件,通过对比研究四种材料非均相芬顿降解四环素的反应动力学,结果表明Fe0不仅催化降解效果最好(四环素的降解率为88.77%)、具有更宽的pH适用范围,而且价格低廉。最后,结合四种材料非均相芬顿降解四环素的TOC去除率以及重复利用效率对比分析,最终筛选出Fe0为非均相芬顿降解四环素的最佳催化剂。

     

    Abstract: Heterogeneous Fenton is widely used in the treatment of antibiotic wastewater. In order to select the best heterogeneous Fenton catalyst which is the lowest cost and effective, the Fe0, Fe3O4, Fe2O3 and -FeOOH were used to be the catalyst for tetracycline degradation in this work. The physicochemical properties of four materials were characterized by X-ray diffraction (XRD), Brunnaer-Emmett-Teller (BET) surface area analyzer and laser particle size analyzer (LDI). The optimum reaction conditions were selected by effects of four catalysts loading, hydrogen peroxide concentration and initial pH. The kinetics of removal tetracycline was studied by comparing four heterogeneous Fenton catalysts. The result showed that Fe0 is the best catalytic for degradation of tetracycline (88.77% of tetracycline was removed), which is suitable for a wide range of pH in the reaction and low prices.In addition, the removal efficiency of the total organic carbon (TOC) and reusability was studied by comparing four heterogeneous Fenton catalysts. Finally, we systematically selected that Fe0 was the best catalyst for heterogeneous Fenton degradation of tetracycline.

     

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