College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, Nanjing, PR China.
School of Food Science and Pharmaceutical Engineering, Nanjing Normal University, Nanjing, PR China.
Crit Rev Biotechnol. 2021 Mar;41(2):273-299. doi: 10.1080/07388551.2020.1869689. Epub 2021 Feb 1.
With the rapid development of industry and agriculture, large amounts of organic pollutants have been released into the environment. Consequently, the degradation of refractory organic pollutants has become one of the toughest challenges in remediation. To solve this problem, intimate coupling of photocatalysis and biodegradation (ICPB) technology, which allows the simultaneous action of photocatalysis and biodegradation and thus integrates the advantages of photocatalytic reactions and biological treatments, was developed recently. ICPB consists mainly of porous carriers, photocatalysts, biofilms, and an illuminated reactor. Under illumination, photocatalysts on the surface of the carriers convert refractory pollutants into biodegradable products through photocatalytic reactions, after which these products are completely degraded by the biofilms cultivated in the carriers. Additionally, the biofilms are protected by the carriers from the harmful light and free radicals generated by the photocatalyst. Compared with traditional technologies, ICPB remarkably improves the degradation efficiency and reduces the cost of bioremediation. In this review, we introduce the origin and mechanisms of ICPB, discuss the development of reactors, carriers, photocatalysts, and biofilms used in ICPB, and summarize the applications of ICPB to treat organic pollutants. Finally, gaps in this research as well as future perspectives are discussed.
随着工农业的快速发展，大量有机污染物被排放到环境中。因此，难降解有机污染物的降解成为修复领域最具挑战性的难题之一。为了解决这个问题，最近开发了光催化与生物降解的紧密偶联（ICPB）技术，该技术允许光催化和生物降解同时作用，从而集成了光催化反应和生物处理的优点。ICPB 主要由多孔载体、光催化剂、生物膜和光照反应器组成。在光照下，载体表面的光催化剂通过光催化反应将难降解污染物转化为可生物降解的产物，然后这些产物被载体中培养的生物膜完全降解。此外，载体还可以保护生物膜免受光催化剂产生的有害光和自由基的影响。与传统技术相比，ICPB 显著提高了降解效率，降低了生物修复的成本。在本文中，我们介绍了 ICPB 的起源和机制，讨论了用于 ICPB 的反应器、载体、光催化剂和生物膜的发展，并总结了 ICPB 在处理有机污染物方面的应用。最后，讨论了该研究领域的空白和未来展望。
