Removal of Ciprofloxacin from Wastewater by Ultrasound/Electric Field/Sodium Persulfate (US/E/PS)

Ciprofloxacin (CIP), as a common antibiotic used in human clinical and livestock farming, is discharged into natural water bodies and its concentration has increased in the last years. Its stable chemical structure is difficult to remove by conventional techniques. Residual ciprofloxacin in the environment has become an emerging micropollutant that promotes the generation of resistance genes of bacteria and endangers ecosystem balance and human health. Removal of ciprofloxacin from water by the system of ultrasound/electric field/sodium persulfate (US/E/PS) was investigated. Firstly, CIP degradation affects by different oxidation methods, such as ultrasonic oxidation, electro-oxidation, and persulfate oxidation, and their four combined oxidation methods (ultrasound-activated persulfate oxidation, electro-activated persulfate oxidation, ultrasound-enhanced electro-oxidation, and ultrasound-enhanced electro-activated persulfate oxidation), on the target contaminants were compared. Secondly, the influences of parameters on the CIP degradation by an ultrasound-enhanced electro-activation-persulfate reaction system were investigated. Thirdly, the possible free radical species in the ultrasound-enhanced electro-activation-sulfate reaction system were identified and the dominant free radical species in the system were analyzed. Finally, the samples of CIP in the US/E/PS system were tested by liquid mass spectrometry, and the possible intermediate products and degradation path were speculated. The results indicate that the US/E/PS system is of great potential application value in the removal of organic pollution and environmental purification.

Selective Electro-oxidation of Phenol to 1,4-Hydroquinone Employing Carbonaceous Electrodes: Surface Modification is the Key

The oxidation of phenol leading to 1,4-hydroquinone with high conversion, remarkable selectivity and excellent yields (87% isolated) has been accomplished under electrolytic conditions in an aqueous medium employing carbon-based electrode....

A Facile Room-Temperature Fabrication of Silver-Platinum Nanocoral Catalyst Towards Hydrogen Evolution And Methanol Electro-Oxidation

With the rising energy demand and growing environmental problems, the produced hydrogen from electrolyzing water has emerged as the most sustainable and clean energy source that can alter to fossil...

Direct Epoxidation of Propylene with Water at PtOx Anode Using a Solid-Polymer-Electrolyte Electrolysis Cell

Direct electro-oxidation of C3H6 was achieved using a solid polymer electrolyte (SPE) electrolysis cell. PtOx anode prepared by mild oxidation of Pt black exhibited superior activity for propylene oxide (PO)...

Electro-Oxidation of Amino-Functionalized Multiwalled Carbon Nanotubes

We report the electrochemistry of amino-functionalized multiwalled carbon nanotubes (MWCNTs-NH2) in the pH range from 0.3 to 6.4 using quantitative cyclic voltammetry (CV) and single entity electrochemistry measurements, making comparison...