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異相類Fenton催化劑降解廢水中抗生素研究進展及發展趨勢

Research progress and development trends in heterogeneous Fenton-like catalysts for degradation of antibiotics in wastewater

  • 摘要: 水中抗生素具有成分復雜、毒性高和難于生物降解等特點,成為近些年水處理領域的研究熱點。均相Fenton氧化技術(Fe2+/H2O2體系)因其反應快速、簡單高效而備受青睞。而異相類Fenton氧化技術采用鐵基固體催化劑代替液相Fe2+,能夠有效減少含鐵污泥的生成,同時拓寬反應的pH值范圍,且催化劑可以回收利用,在近些年得到了快速發展,將其應用于抗生素的降解也取得了理想的效果。從異相類Fenton催化原理出發,綜述了異相類Fenton催化劑降解抗生素的研究進展。基于異相類Fenton催化劑的核心問題,重點闡述了改善催化性能的方法、措施以及新的觀點。針對異相類Fenton技術降解抗生素存在的問題提出了今后的發展方向。

     

    Abstract: China is one of the major antibiotic producing and consuming countries in the world and demand for and output of antibiotics are increasing year by year. The wastewater produced during the production of antibiotics is of complex composition, high chemical oxygen demand, high concentrations of toxic and harmful substances and strong resistance to biodegradation. This is problematic for the process of pharmaceutical wastewater treatment. Additionally, due to the extensive use of antibiotics, a variety of antibiotics are constantly released into the environment, with adverse effects on aquatic organisms. Although antibiotic concentrations in wastewater are low, the accumulation of low-dose, long-duration antibiotics can lead to the development of drug-resistant strains that threaten human health and the entire ecosystem. Therefore, how to effectively remove antibiotic residues in water is an important challenge toward ensuring the safety of water quality, the environment, and ecology. Advanced oxidation technology (AOP), which has an extremely high oxidation potential, can generate hydroxyl radicals in the reaction process, and can degrade organic compounds rapidly without secondary pollution. Therefore, it exhibits clear advantages in the treatment of antibiotics in water. As a kind of AOP, homogeneous Fenton oxidation technology (Fe2+/H2O2 system) has attracted considerable attention owing to its rapid reaction, simplicity, and high degradation efficiency. Heterogeneous Fenton-like oxidation technology using an iron-based solid catalyst instead of Fe2+ ions can effectively reduce the formation of iron-containing sludge and broaden the pH reaction range to overcome the shortcomings of Homogeneous Fenton. Moreover, recycling of the catalyst has been developed rapidly in recent years and has achieved ideal results when applied to the degradation of antibiotics. In this paper, research progress in heterogeneous Fenton-like catalysts for degradation of antibiotics was reviewed. Based on the core issues of heterogeneous Fenton-like catalysts, the methods, measures, and new viewpoints for improving catalytic performance were expounded upon. Aiming at the problems of heterogeneous Fenton-like technology in degrading antibiotics, future development directions were presented.

     

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