Elimination of cephalexin and doxycycline under low frequency ultrasound

Sierra, Rafael Santiago Cárdenas; Zúñiga-Benítez, Henry; Peñuela, Gustavo A.

doi:10.1016/j.ultsonch.2021.105777

Cited by 16 publications

(7 citation statements)

References 46 publications

(52 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…TCs are amphoteric compounds, meaning that different species will predominate in water as a function of the pH. At pH 7.5–10, the monoanionic form, TC – , is present, at pH > 10, the dianionic form, TC 2– , predominates and, at pH < 4, the protonated form, TC + , is principally found. , As reported by other authors, , the TC-degradation rate for both cavitational and photochemical oxidation treatments are generally influenced by the starting pH of the water solution, leading to remarkable reductions or increases in TC removal, compared to processes performed at their natural pH. For the sake of comparison, different degradation treatments for TC, DC and OC were performed, in this work, under hybrid HC/ED at starting pH values of 2 and 11 and the best operating conditions.…”

Section: Resultsmentioning

confidence: 99%

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

Verdini

Gaudino

Canova

et al. 2023

Ind. Eng. Chem. Res.

View full text Add to dashboard Cite

Tetracyclines are widely used antibiotics that are often carelessly released into the environment, posing a potential threat to the ecosystem. Due to the lack of efficient methods to remove tetracyclines from wastewater, a remarkable research effort on the remediation of tetracyclines has been undertaken. The synergistic effect of hydrodynamic cavitation (HC) and electrical discharge (ED) plasma on the degradation of a number of antibiotics in water has been studied in this work. Catalyst- and oxidant-free processes have been carried out using a new pilot-scale hybrid device (HC/ED plasma) working in flow-through mode (330 L/h). Tetracycline hydrochloride (TC), doxycycline hyclate (DC) and oxytetracycline dihydrate (OC) were selected as the model compounds. Antibiotic degradation tests were performed using a 5 L water solution at various antibiotic concentrations (10, 25, 50, 75, and 100 mg/L). All experiments were performed over 15 min, and samples were either collected using the flow-through method, or every 5 min when using the loop configuration. The temperature was kept constant at 30 °C, with fluctuations of ±2 °C. The influence of applied HC input pressure (45, 60, and 70 bar), applied ED amplitude frequency (10 and 48 kHz) and the pH values of the initial solutions (2 and 11) on antibiotic degradation rate have been investigated. Near quantitative TC (>98%), DC (98%) and OC (95%) degradation was documented after only 15 min of combined HC/ED plasma treatment at 70 bar and 48 kHz. To better understand the synergistic effect of coupled HC/ED treatment on antibiotic degradation, a dosimetry assay was performed to quantify the oxidizing compounds generated by this technology. Specifically, the coupled HC/ED plasma treatment was able to linearly increase the amount of oxidants in water as a function of time, reaching a maximum concentration of 13.426 mmol/L after 15 min, which is more than 85-times higher than that of HC alone (0.153 mmol/L). This study demonstrates the impressive efficiency of hybrid HC/ED plasma technology in degrading recalcitrant antibiotics in wastewater without the need for catalysts and oxidants.

show abstract

Section: Resultsmentioning

confidence: 99%

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

Verdini

Gaudino

Canova

et al. 2023

Ind. Eng. Chem. Res.

View full text Add to dashboard Cite

show abstract

“…In recent research, Sierra et al [90] presented a low-frequency ultrasonic oxidation to remove cephalexin (CPX) and doxycycline (DOX) from water, and the pharmaceuticals were completely degraded at a frequency of 40 kHz. The system had a significant effect on antibiotics elimination, which could diminish the potential risk to ecosystems.…”

Section: Ultrasonic Oxidationmentioning

confidence: 99%

Removal of Pharmaceuticals and Personal Care Products (PPCPs) by Free Radicals in Advanced Oxidation Processes

Jiao

Song

et al. 2022

Materials

View full text Add to dashboard Cite

As emerging pollutants, pharmaceutical and personal care products (PPCPs) have received extensive attention due to their high detection frequency (with concentrations ranging from ng/L to μg/L) and potential risk to aqueous environments and human health. Advanced oxidation processes (AOPs) are effective techniques for the removal of PPCPs from water environments. In AOPs, different types of free radicals (HO·, SO4·−, O2·−, etc.) are generated to decompose PPCPs into non-toxic and small-molecule compounds, finally leading to the decomposition of PPCPs. This review systematically summarizes the features of various AOPs and the removal of PPCPs by different free radicals. The operation conditions and comprehensive performance of different types of free radicals are summarized, and the reaction mechanisms are further revealed. This review will provide a quick understanding of AOPs for later researchers.

show abstract

“…Ultrasound can transmit strong energy and produce a considerable impact between interfaces when it is propagated in a gas, liquid, or solid, accompanied with the consumption of energy and the corrosion of equipment and materials [18,19]. As the application of ultrasound in the treatment of organic wastewater does not involve the addition of chemicals and does not cause secondary pollution [20], ultrasound is welcomed by many researchers, and it has been applied in combination with other treatment methods such as electrochemistry oxidation, photocatalytic oxidation, FE oxidation, membrane filtration, and PS oxidation [21]; its excellent enhancement capacity to various treatment methods of organic wastewater has been confirmed by many reports [22][23][24].…”

Section: Introductionmentioning

confidence: 99%

Study and Application Status of Ultrasound in Organic Wastewater Treatment

Wang,

Li,

Wang

et al. 2023

Sustainability

View full text Add to dashboard Cite

Ultrasound waves have been widely used in the field of organic wastewater treatment due to their mechanical, thermal, and chemical effects derived from their cavitation effect. Many researchers have combined ultrasound waves with other organic wastewater treatment methods because they have the potential to offset the disadvantages of other methods. In recent years, many authors within the literature have reviewed the application of ultrasound combined with a certain wastewater treatment method. In this review, we introduce the working mechanism of ultrasound in the treatment of organic wastewater and then examine the synergistic effects of ultrasound with other organic wastewater treatment methods based on various applications, indicating a strong synergistic effect between ultrasound and other wastewater treatment methods. Subsequently, we introduce typical ultrasound-enhanced organic wastewater treatment equipment and propose some possible developmental directions for ultrasound in the treatment of organic wastewater.

show abstract

Elimination of cephalexin and doxycycline under low frequency ultrasound

Abstract: Highlights Antibiotics cephalexin and doxycycline were removed using 40 kHz ultrasound. Optimized conditions were selected. Toxicity and mineralization data were analyzed. Hydroxyl radicals seem to be the main oxidizing specie on treatment.

Cited by 16 publications

References 46 publications

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

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

Removal of Pharmaceuticals and Personal Care Products (PPCPs) by Free Radicals in Advanced Oxidation Processes

Study and Application Status of Ultrasound in Organic Wastewater Treatment

Contact Info

Product

Resources

About