Institute of Chemical Technology and Engineering, Poznan University of Technology, Berdychowo 4, 60-965 Poznan, Poland.
Department of Process Engineering and Chemical Technology, Gdansk University of Technology, Gabriela Narutowicza 11/12, 80-233 Gdansk, Poland.
Int J Mol Sci. 2021 Feb 22;22(4):2186. doi: 10.3390/ijms22042186.
(1) Background: Environmental contamination with antibiotics is particularly serious because the usual methods used in wastewater treatment plants turn out to be insufficient or ineffective. An interesting idea is to support natural biodegradation processes with physicochemical methods as well as with bioaugmentation with efficient microbial degraders. Hence, the aim of our study is evaluation of the effectiveness of different methods of nitrofurazone (NFZ) degradation: photolysis and photodegradation in the presence of two photocatalysts, the commercial TiO-P25 and a self-obtained FeO@SiO/TiO magnetic photocatalyst. (2) Methods: The chemical nature of the photocatalysis products was investigated using a spectrometric method, and then, they were subjected to biodegradation using the strain NFZ2. Additionally, the effects of the photodegradation products on bacterial cell surface properties and membranes were studied. (3) Results: Photocatalysis with TiO-P25 allowed reduction of NFZ by over 90%, demonstrating that this method is twice as effective as photolysis alone. Moreover, the bacterial strain used proved to be effective in the removal of NFZ, as well as its intermediates. (4) Conclusions: The results indicated that photocatalysis alone or coupled with biodegradation with the strain NFZ2 leads to efficient degradation and almost complete mineralization of NFZ.
(1) 背景：抗生素对环境的污染尤其严重，因为污水处理厂通常采用的方法要么效果不足，要么无效。一个有趣的想法是，用物理化学方法以及用高效微生物降解剂进行生物增强来支持自然生物降解过程。因此，我们研究的目的是评估不同方法降解硝呋扎酮（NFZ）的效果：在两种光催化剂（商业 TiO-P25 和自制的 FeO@SiO2/TiO 磁性光催化剂）存在的情况下进行光解和光降解。(2) 方法：使用分光光度法研究光催化产物的化学性质，然后用 NFZ2 菌株进行生物降解。此外，还研究了光降解产物对细菌细胞表面特性和膜的影响。(3) 结果：TiO-P25 的光催化作用使 NFZ 的还原率超过 90%，表明该方法的效果是单独光解的两倍。此外，所使用的细菌菌株被证明能够有效去除 NFZ 及其中间产物。(4) 结论：结果表明，单独的光催化或与 NFZ2 菌株的生物降解相结合，可实现 NFZ 的有效降解和几乎完全矿化。
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