Ultrasound-enhanced nanosized zero-valent copper activation of hydrogen peroxide for the degradation of norfloxacin

Ma, Xiaoyan; Cheng, Yongqing; Ge, Yongjian; Wu, Huadan; Li, Qingsong; Gao, Naiyun; Deng, Jing

doi:10.1016/j.ultsonch.2017.08.025

Cited by 129 publications

(25 citation statements)

References 63 publications

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“…A sono‐Fenton system was developed based on nanometer zero valence copper (nZVC) and hydrogen peroxide in conjunction with ultrasonic irradiation for norfloxacin degradation (NOR) 114. NOR was completely removed after 30 min of degradation, significantly improved in the Fenton process with advanced sleep, involving a synergistic effect between the two treatment technologies.…”

Section: Synergistic Effects Of Ultrasound Associated With Other Degradation Technologiesmentioning

confidence: 99%

Ultrasound as an Advanced Oxidative Process: A Review on Treating Pharmaceutical Compounds

2021

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Ultrasound treatment, among the various existing water and effluent treatment techniques, is considered an emerging method in recent years due to the degradation of complex organic and inorganic contaminants. It offers substantial advantages, such as cleanliness, safety, and minor or non‐existent secondary pollution products, when compared to other advanced oxidation processes (AOPs). A systematic review of the published peer‐reviewed literature relating the use of ultrasound as an AOP is provided based on theoretical concepts and factors that influence sonochemical reactions. The synergistic effects of ultrasound with other degradation technologies for the oxidation of medications are investigated and the importance of assessing toxicity and biodegradability for the treatment of water and effluents with emerging pollutants is evaluated. The mechanistic understanding of the sonochemical effects in drugs, classification of intermediates, and the development of new treatment technologies are still the subject of future research, however, the synergy of treatments and cavitation studies must be considered.

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Section: Synergistic Effects Of Ultrasound Associated With Other Degradation Technologiesmentioning

confidence: 99%

Ultrasound as an Advanced Oxidative Process: A Review on Treating Pharmaceutical Compounds

2021

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“…33,34 As such, some ester bonds of PGA monofilaments may be partially hydrolyzed under the effects of ultrasound cavitation and hydrogen peroxide corrosion. 35 Surface hydrophilicity of modified and unmodified PLA and PGA monofilaments. Figure 4 shows the contact angle values of the PLA and PGA groups.…”

Section: Structural Characterization Of Prepared Samplesmentioning

confidence: 99%

Ultrasonic modification of polylactic acid and polyglycolic acid acupoint catgut embedding monofilaments for juvenile pseudomyopia

Yang

Zhao

et al. 2018

Textile Research Journal

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Acupoint catgut embedding therapy (ACET) has become the most promising method for treatment of juvenile pseudomyopia due to its advantages of lasting effect, high efficiency, safety and no side effects. However, poor hydrophilicity and biocompatibility are the main disadvantages, preventing ACET materials from having wide applications. This work fabricated four types of polylactic acid (PLA) and polyglycolic acid (PGA) monofilaments from their polymer chips, and then the prepared monofilaments were treated ultrasonically by dipping them in a mixed solution composed of ethyl alcohol and H2O2 (volume ratio 1:1) at 250 W ultrasonic power for 30 min. Afterwards, the PLA and PGA groups were fully characterized with respect to structure characterizations, mechanical properties and in vitro properties. The results showed that the surface roughness of the monofilaments had been greatly enhanced by ultrasonic modification. The PLA groups’ molecular structures changed little, while those of the PGA group emerged with some polar hydrophilic bonds. By deionized water measurement of contact angle values, the ultrasound modified PLA monofilaments (UMPLA1 = 87.2 ± 2.5°, UMPLA2 = 83.6 ± 3.5°) presented a decrease compared to that of untreated PLA ones (PLA1 =103.5 ± 3.4°, PLA2 = 108.4 ± 1.2°), while that of ultrasound modified PGA monofilaments (UMPGA1 = 75.6 ± 4.3°, UMPGA2 =70.5 ± 3.1°) was smaller than untreated PGA ones (PGA1 = 97.3 ± 1.7°, PGA2 = 95.8 ± 2.6°). Based on the measurement of the mechanical properties, the tensile properties and bending stiffness of the PLA and PGA groups changed little, and their swelling ratios were greatly improved after modification. All the prepared monofilaments presented non-toxicity with good cell viability (more than 75%), and samples UMPGA2 (81.4 ± 3.1%) and UMPLA2 (65.8 ± 0.8%) exhibited the largest cell attachment ratio values among their groups. In conclusion, these findings present important clinical implications regarding the ACET materials manufacturing process, which warrant further study.

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“…Xiaoyan et al used nanosized zero-valent copper (nZVC) to activate H 2 O 2 to remove norfloxacin, and a significant enhanced removal rate was obtained when ultrasound was introduced [30]. This phenomenon could be attributed to the fact that the corrosion of metal catalysts can be strengthened significantly by better cleaned surfaces of catalysts in the presence of ultrasound, which accelerates the catalytic reaction [36].…”

Section: Introductionmentioning

confidence: 99%

“…The possible reason is that in the presence of a catalyst, PS decomposed faster, so more was formed [26]. The removal efficiency was SO •-4 up to 97.0% in the sono-advanced PS/ZVC process, indicating that a positive synergistic activity existed in the PS/ZVC/US system [30]. Compared with the PS/ZVC system, the use of ultrasound could possibly continuously clean the catalyst surface, and accelerate the formation of cavities [44].…”

mentioning

confidence: 99%

Ultrasound-enhanced zero-valent copper activation of persulfate for the degradation of bisphenol AF

Wang

Cao

Han

et al. 2019

Chemical Engineering Journal

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Ultrasound (US) was introduced into a persulfate (PS) / zero-valent copper (ZVC) system for the degradation of bisphenol AF (BPAF). In this system, ZVC worked as a catalyst to activate PS. Compared with the PS/ZVC process, the degradation rate of BPAF in the PS/ZVC/US system raised significantly from 59.8% to 97.0% due to a synergistic interaction between sonolysis and a heterogeneous reaction. When ultrasound was 120 W at 20 kHz and initial BPAF concentration was 20 mol/L, the BPAF could be completely removed after a 60-min reaction with 0.5 g/L ZVC, 1 mM PS. According to kinetics research, the decomposition of BPAF in a PS/ZVC/US system could be separated into two stages with a demarcation point after about 20 min of reaction via pseudo-first-order rate constants (). A Quantitative analytical k obs modeling for the study of main radicals was established, and the result indicated was the predominant radical in acidic conditions and both •OH and SO •-4 SO •-4 were the predominant radicals in relative basic conditions. Moreover, the effects of initial persulfate dosage, initial BPAF concentration, and coexisting inorganic anions on BPAF degradation were evaluated. A high-accuracy mass spectrometer was used to study the oxidation process and potential activities were deduced. Finally, the possible reaction mechanisms in the PS/ZVC/US system is proposed that the surface heterogeneous catalysis was the key step to activate PS. This work will promote the understanding of the utilization of ZVC in advanced oxidation and also the key role of in activating PS. Cu +

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Ultrasound-enhanced nanosized zero-valent copper activation of hydrogen peroxide for the degradation of norfloxacin

Cited by 129 publications

References 63 publications

Ultrasound as an Advanced Oxidative Process: A Review on Treating Pharmaceutical Compounds

Ultrasound as an Advanced Oxidative Process: A Review on Treating Pharmaceutical Compounds

Ultrasonic modification of polylactic acid and polyglycolic acid acupoint catgut embedding monofilaments for juvenile pseudomyopia

Ultrasound-enhanced zero-valent copper activation of persulfate for the degradation of bisphenol AF

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