Degradation of tetracycline by directly-coupling process of visible light responded photocatalysis and biodegradation

doi:10.11894/1005-829x.2018.38(5).062

Abstract

Abstract: The degradation behavior of the typical antibiotics-tetracycline(TCH) in the direct-coupling system has been investigated,and the response behavior and key effect of bio-films in the direct-coupling system studied emphatically. The results show that TCH cannot be removed by biological degradation only. Compared with single photoca-talysis,the removing rates of TCH and soluble COD(SCOD) by the direct-coupling system are increased by 3% and 17%,respectively. The biofilm in VPCB keeps survival by making use of TCH photocatalysis intermediate products,and adapts environmental stress through the enrichment of bacteria genus related to the degradation of Methylibium,Runella,Comamonas,Pseudomonas,etc. In addition,the succession of biofilm community structure can have obvious influence on the degradation route of TCH in VPCB.

Key words: photocatalysis oxidation, biodegradation, direct-coupling, tetracycline hydrochloride

摘要： 考察了典型的抗生素——盐酸四环素（TCH）在光催化生物降解直接耦合体系中的降解行为，重点研究了生物膜在直接耦合体系中的响应行为和关键作用。研究结果表明，单独的生物降解不能去除TCH；与单独的光催化相比，直接耦合体系对TCH和溶解性COD（SCOD）的去除率分别提高了3%和17%。直接耦合（VPCB）体系中生物膜通过利用TCH光催化中间产物存活下来，并且通过Methylibium、Runella、Comamonas、Pseudomonas等与TCH和芳香烃降解相关菌属的富集来适应环境胁迫，同时生物膜群落结构的演替会对VPCB中TCH的降解途径产生明显的影响。

关键词: 光催化氧化, 生物降解, 直接耦合, 盐酸四环素

CLC Number:

X703

Ju Ran, Guo Haixin, Zhou Dandan. Degradation of tetracycline by directly-coupling process of visible light responded photocatalysis and biodegradation[J]. INDUSTRIAL WATER TREATMENT, 2018, 38(5): 62-67.

鞠然, 郭海欣, 周丹丹. 可见光响应的光催化生物降解直接耦合降解四环素[J]. 工业水处理, 2018, 38(5): 62-67.

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https://www.iwt.cn/EN/Y2018/V38/I5/62

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