化学
降级(电信)
高级氧化法
光催化
催化作用
过硫酸盐
电解
无机化学
作者
Elham Aseman-Bashiz,Hossein Sayyaf
出处
期刊:Chemosphere
[Elsevier]
日期:2021-07-01
卷期号:274: 129772-
被引量:4
标识
DOI:10.1016/j.chemosphere.2021.129772
摘要
Abstract In this work, nanopyrite particles (NP) were synthesized by ball mill method and used as a novel source of Fe 2 + in the electro-activation of ozone and peroxydisulfate (PDS) for ofloxacin (OFX) removal. Fourier transform infrared spectroscopy, X-ray powder diffraction, field emission scanning electron microscopy and energy-dispersive X-ray spectroscopy analyzes were performed to characterize the as-made NP. Optimal values of operating parameters in NP/PDS and NP/ O 3 processes were obtained. The OFX (10 mg L − 1 ) removal efficiency and molar ratio of OFX: oxidant in NP/PDS and NP/ O 3 processes were 92%, 0.1:11 and 89%, 0.1:9, respectively. Although the synergistic effect was observed in both systems, it was more significant in the NP/PDS. The results of free radical tracing showed that HO • and SO 4 • − had the more contribution in NP/ O 3 and NP/PDS systems for OFX degradation, respectively. In this way, the OFX removal mechanism was the effective release of Fe 2 + from the NP in the electro-activation of O 3 and PDS. Moreover, the effect of electrocoagulation process on OFX removal was negligible. The as-made NP overcame the disadvantages of iron electrode corrosion and iron sludge production in the Fe-based classical electro-activation processes. Overall, the performance of the synthesized NP in the OFX oxidation was very successful in terms of sustainability, Fe 2 + distribution, removal efficiency, energy consumption and PDS or O 3 activation.
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