Fast Degradation of Tetracycline and Ciprofloxacin in Municipal Water under Hydrodynamic Cavitation/Plasma with CeO2 Nanocatalyst

Abstract

Although water contamination with drug residues is a threat to public health, there are currently barely any effective methods of purifying water from pharmaceutical substances. In this study, continuous-flow sonoplasma treatment was used for the complete degradation of tetracycline and ciprofloxacin in polluted municipal water. The addition of CeO2 nanoparticles as catalysts significantly increased the degradation rate of the antibiotics, and а degradation degree of 70% was achieved. The presence of reactive oxygen species in the CeO2-nanoparticle-containing sonoplasma-treated system was experimentally proven for the first time using the chemiluminescence technique.

Cobalt-substituted ZnS QDs: a diluted magnetic semiconductor and efficient photocatalyst

“…When released into the environment untreated, CIP can also act as a pollutant. [1][2][3][4][5][6][7][8] The physicochemical characteristics of CIP are presented in Table S1 (ESI section). † Co-doped ZnS QDs were employed in the photocatalytic experiments to degrade CIP in water solutions.…”

Highly Efficient Tetracycline Degradation under Simultaneous Hydrodynamic Cavitation and Electrical Discharge Plasma in Flow

“…A hybrid prototype system, based on HC technology coupled with ED, for TC degradation (C 0 40 mg/L) in the presence of 5 mg/L of catalyst has previously been reported by Abramov et al (Table 1). 18 In detail, the authors conducted the experiment in flow mode only, passing the TC solution 1, 2, or 3 times through the discharge chamber (8.6 kV applied voltage and 43 kHz applied amplitude) with no recirculation. After the first cycle, which represents true flow treatment, TC was degraded by a value of 41%, which is slightly higher than that observed in the flow configuration adopted in this work with an amplitude of 10 kHz (38.2%), but lower than that observed at an applied amplitude of 48 kHz (51.7%) (Figure 3a).…”

“…31,32 Nonthermal plasma (NTP) technology is one such emerging advanced oxidation method and has recently been used in combination with HC to treat various pollutants, receiving widespread attention thanks to the advantages that it offers, which include high efficiency, simplicity and an environmentally friendly approach. 18 However, developing more effective and safe nonthermal plasma technologies for use in pollutant-treatment applications is still a challenge, and this is especially true for the development of efficient application-based instruments. In this work, we therefore present a novel approach to the application of ED plasma in the processing of tetracyclines in combination with a pilot HC device.…”

“…Besides adsorption, nanofiltration and hydrothermal treatment, advanced oxidation processes (AOPs) − are the most commonly employed and cost-effective technologies for the complete degradation of persistent organic contaminants, such as TC and other antibiotics, in wastewater . AOPs have recently been successfully coupled with several emerging technologies, such as cavitational treatment and nonthermal plasma technologies, , in order to enhance their ability to degrade antibiotics via OH • radical production.…”

“…Nonthermal plasma (NTP) technology is one such emerging advanced oxidation method and has recently been used in combination with HC to treat various pollutants, receiving widespread attention thanks to the advantages that it offers, which include high efficiency, simplicity and an environmentally friendly approach …”