Insight into the performance and mechanism of magnetic Ni0.5Cu0.5Fe2O4 in activating peroxydisulfate for ciprofloxacin degradation

Abstract

Magnetic nickel-copper ferrite (NixCuyFe2O4) nano-catalyst was synthesized by co-precipitation method, and it exhibited excellent ability for activating peroxydisulfate (PDS) in the degradation of ciprofloxacin (CIP). As-prepared Ni0.5Cu0.5Fe2O4 properties were characterized by Fourier-transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), scanning electron microscope equipped with an energy-dispersive X-ray (SEM-EDX), transmissions electron microscopy (TEM), N2 adsorption-desorption isotherm plot of Brunauer-Emmett-Teller (BET) and Barrett-Joyner-Halenda (BJH), vibrating sample magnetometer (VSM). The maximum degradation efficiency is 80.2% by using 0.500 g/L of Ni0.5Cu0.5Fe2O4 for activating 5.00 mmol/L of PDS to degrade CIP (20.0 mg/L) at 25 ± 2 °C for 50 min (pH = 6.00). The presence of interfering ions Cl−, NO3−, and HCO3− inhibited the reaction by producing reactive species with low oxidation potential, inducing the degradation efficiency decreased down to 60.0%, 58.1% and 21.5% respectively. Ni0.5Cu0.5Fe2O4 displayed great magnetic separation characteristic for the satisfactory magnetization saturation value is ∼8.6 emu/g. The degradation efficiency of recycled samples is no significant difference after using for three times, which is about 60%, indicating that Ni0.5Cu0.5Fe2O4 is a reusability catalyst in activating PDS for CIP degradation. This work might provide an efficient and promising approach to construct recyclable magnetic materials that can be used for wastewater treatment.

Efficient degradation of organic pollutants using peroxydisulfate activated by magnetic carbon nanotube

“…Based on these results, it was concluded that the decreased activity of the catalyst was not mainly caused by metal leaching but attributed to the presence of oxidation products adsorbed on the catalyst surface, which could not be removed completely by washing. These species occupied some sites on the catalyst surface and acted as competitors during the oxidation process (Wang et al 2022), consuming the oxidant and leading to declined removal efficiency of RhB in the consecutive runs.…”

Magnetic and electrical transport properties of Cu0.5Ni0.5Fe2O4 ferrite synthesized by plasma arc discharge process

“…Furthermore, NiCu ferrites possess desirable characteristics such as high electrical resistivity, low eddy currents, and low hysteresis loss, which make them suitable candidates for use in transformers and surface mount devices (SMDs) [10]. In addition, Cu 0.5 Ni 0.5 Fe 2 O 4 ferrite has been used for biomedical applications [11] and also as a reusability catalyst for the removal of organic pollution from aquatic environments [12]. Dat et al [9] have successfully synthesized a nanocomposite comprised of reduced graphene oxide, Cu 0.5 Ni 0.5 Fe 2 O 4 nanoparticles, and polyaniline (RGO-CNF-PANI).…”