| 论文摘要： |
Efficient and sustainable removal of tetracycline (TC) from water is an urgent but challenging task due to the shortcomings of traditional treatment processes, such as accumulation of refractory degradation intermediates and excessive chemical consumption. Herein, we developed a novel integrated advanced oxidation process (AOP) and biodegradation technology to investigate the feasibility of the treatment of TC. The melamine sponge served as a carrier for loading FeS and cultivating microorganisms (FeS@MS/PMS + B) to enhance the degradation efficiency of TC. Besides pre-adsorption, biodegradation alone only resulted in similar to 50 % TC removal within 30 min, whereas FeS@MS/PMS removed 77.6 % of TC. Under optimum conditions (PMS = 0.1 mM, catalyst dosage = 0.2 g/L), the coupled system eliminated 97 % of TC and 68.2 % of total organic carbon (TOC). During five operation cycles, the degradation efficiency of TC was maintained at more than 90 %. The fix-bed column was constructed to simulate long-term treatment of TC. The results showed that the coupled system could be operated stably for 60 days, twice as long as the single AOP. The X-ray photoelectron spectroscopy (XPS) results suggested that Fe(II) occupied the primary constitute on the surface of FeS, implying the potential reduction of Fe(III) with the aid of microorganisms. According to high throughput sequencing analysis, the microorganisms enriched on the sponge were identified as Proteobacteria, Bacteroidetes, Chloroflexi, Firmicutes, Gemmatimonadetes, and Actinobacteria. This work provides a viable option for the treatment of antibiotic-containing wastewater. |
