由于水体中新兴污染物不断增多，如何运用新型处理技术来弥补传统污水处理方法的缺陷已成为当前的研究热点。光催化耦合微生物同步降解污染物（ICPB）在保留生物法处理废水优点的同时，耦合了光催化高效、迅速的特性，可实现对多种污染物质的有效降解，节约了能源和成本，成为水体污染物有效去除的一个重要研究方向。ICPB体系主要由多孔载体、光催化材料及生物膜构成；其主要的工作原理是通过光激发载体上的光催化材料，将水体中难生物降解的污染物转化为可生物降解的物质，同时在载体内部微生物的代谢作用下，将这些污染物的中间降解产物继续矿化。本文根据光催化耦合微生物同步降解污染物体系中的关键构成，归纳总结了载体种类、光催化材料和负载生物的研究进展，探讨了该方法在去除水体污染物中的实际应用，并展望了其将来发展的方向和趋势。
Due to the growing emerging contaminants in water, how to overcome the defect of traditional sewage treatment method with the new technology has become a current research hot spot. Intimate coupling of photocatalysis and biodegradation (ICPB) as a new method of pollutant removal, which contains the advantages of biological treatment and the efficient and rapid characteristics of photocatalytic reactions, has attracted a lot of attention and become an important research field. The system is mainly composed of porous carriers, photocatalytic materials and biofilms. The key principle of ICPB is that bio-recalcitrant pollutants are transformed to biodegradable products by photocatalysis that occurs on the surface of porous carriers. The biodegradable products are simultaneously mineralized by the biofilm that cultivated in the carriers. The bacteria can keep activity even under the harsh light because of the protection of carriers. The combination of photocatalysis and biodegradation has been used to degrade a variety of contaminants with efficiency and rapidity. This technology breaks the traditional concept, which holds the point that photocatalytic reaction and biodegradation must be separated in different reactors, improves the sewage purification ability and saves the cost. This review introduces the different types of carriers, photocatalysts and biofilm, and presents the main applications in purification of sewage and possible development direction and trend in the future.
Contents
1 Introduction
2 The carriers
2.1 Macroporous cellulosic cubes
2.2 Porous ceramic particles
2.3 Polyurethane sponge
3 Photocatalyst materials
3.1 Ultraviolet-light photocatalysts
3.2 Visible-light photocatalysts
4 Biofilm
5 Applications
5.1 Denitrification
5.2 Dechlorination
5.3 Degradation of reactive dyes
5.4 Degradation of antibiotics
6 Conclusion and Outlook
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