期刊
JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY
卷 92, 期 9, 页码 2300-2308出版社
WILEY
DOI: 10.1002/jctb.5227
关键词
Fenton; STP effluent; degradation; DOC removal
类别
资金
- FAPESP [2015/21732-5]
- CNPq [151022/2014-3, 308649/2015-0]
- Fundacao de Amparo a Pesquisa do Estado de Sao Paulo (FAPESP) [15/21732-5] Funding Source: FAPESP
BACKGROUND: Ciprofloxacin (CIP) is an antibiotic largely used to treat bacterial infections and found in sewage treatment plant (STP) effluent. Zero valent iron (ZVI, Fe2+) technology has great potential for the degradation of residual pharmaceuticals. The effect of some parameters (anaerobic/aerobic, particle size, iron ligands and anions) were evaluated for CIP degradation in distilled water (DW) and finally compared to that obtained in STP effluent. RESULTS: The smaller ZVI particle (200 mesh) resulted in a lower degradation rate than the larger particle (20 mesh) in both anaerobic and aerobic treatment. This is due mainly to the fast generation of Fe2+, hindering the degradation process due to (OH)-O-center dot scavenging. A linear increase of CIP degradation ratewas observed when the reactionwas carried out with increasing EDTA concentrations. The Cl- anions had a positive effect on CIP degradation in the ZVI process. On the other hand, the presence of NO3- resulted in a decrease of degradation rate, both with 20 and 200 mesh particles. CIP could be degraded in two STP effluents mediated by ZVI (20 mesh). CONCLUSIONS: The ZVI process can be used efficiently for the degradation of CIP in two types of STP effluent (anaerobic treatment or anaerobic/aerobic treatment), revealing a possible applicability of the ZVI process to this type of matrix. (C) 2017 Society of Chemical Industry
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