Complexation determines the removal of multiple tetracyclines by ferrate

Yao, Jingjing; Wen, Jiayi; Li, Haipu; Yang, Ying; Yang, Hui Ying

doi:10.1016/j.seppur.2023.123804

Cited by 16 publications

(2 citation statements)

References 52 publications

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“…Microplastics (MPs), defined as plastic particles smaller than 5 mm, have emerged as pollutants of emerging concern due to their persistent nature and potential adverse effects on ecosystems. − The development of innovative technologies to mitigate MP contamination in wastewater is still in its early stages, − with many mechanisms yet to be explored. Aquatic environments are the primary repositories for a diverse array of contaminants, and the coexistence of organic pollutants and MPs is increasingly problematic, leading to the formation of composite pollutants. ,− Current research on advanced oxidation processes (AOPs) predominantly focuses on removing individual organic pollutants, − often neglecting the simultaneous presence of MPs. MPs can act as carriers and adsorbents, potentially causing secondary pollution or altering the physicochemical properties of the reaction medium, which can affect the degradation rate of pollutants and the formation of byproducts in AOPs. , This oversight prevents an accurate portrayal of organic pollutant removal under different AOPs, highlighting the need to investigate the effects and mechanisms of MPs on the removal of organic pollutants using typical AOPs.…”

Section: Introductionmentioning

confidence: 99%

Effect of Microplastics on the Flow-Through Electro-Peroxone Process: A Computational Fluid Dynamics Simulation

Yao,

Li,

Qiu

et al. 2024

ACS EST Water

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Current research on advanced oxidation processes often focuses on removing individual organic contaminants, sometimes overlooking the impact of microplastics (MPs) on mass transfer. Real-time and precise monitoring through experimental measurements is challenging. In this study, we used computational fluid dynamics simulations to examine the effect of MPs on mass transfer in a flow-through electro-peroxone process. Our findings revealed that MPs decreased the concentration of hydroxyl radicals at the electrochemical cathode/solution interface. However, there was no significant impact on the concentrations and diffusion pathways of O 3 in the inlet gas phase and hydrogen peroxide on the electrochemical cathode surface. Additionally, the average size of MPs increased from 135.0 to 750.0 μm, and their count rose from 7474 to 10,924 particles/L. This was accompanied by increases in average turbulent kinetic energy and turbulent dissipation rate by 0.027 and 0.018 km 2 /s 2 , and 0.041 and 0.702 m 2 /s 3 , respectively. These changes suggested that the enlargement and increased count of MPs hindered liquid flow, reducing the efficiency of converting gaseous O 3 to aqueous O 3 . Consequently, this diminished the removal efficiency of pollutants in the electro-peroxone process. These insights are crucial for developing more efficient advanced oxidation processes for the simultaneous removal of MPs and pollutants.

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Section: Introductionmentioning

confidence: 99%

Effect of Microplastics on the Flow-Through Electro-Peroxone Process: A Computational Fluid Dynamics Simulation

Yao,

Li,

Qiu

et al. 2024

ACS EST Water

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“…It has two standard redox potentials: 0.72 V in alkaline solutions and 2.20 V in acidic solutions. In water, it exists in four species (H 3 FeO 4 + , H 2 FeO 4 , HFeO 4 – , and FeO 4 2– ) with three pKa values of 1.6, 3.5, and 7.3 . The degradation of organic pollutants by FeVI is primarily attributed to high-valence iron oxidation, which is heavily influenced by the solution pH. , Additionally, the removal efficiency of FeVI is dependent on the chemical structure of the pollutants due to its selective nature .…”

Section: Introductionmentioning

confidence: 99%

Effects of Polystyrene Microplastics on Multiple Tetracycline Removals by Ferrate

Yao

Yang

2023

Ind. Eng. Chem. Res.

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Water treatment processes typically focus on eliminating organic pollutants in wastewater but often overlook the presence of coexisting microplastics. In this study, we examined the effects of polystyrene microplastics on removing three tetracyclines using ferrate. The presence of polystyrene microplastics influenced the efficiency of oxidation, adsorption, coagulation, and complexation, leading to varying degrees of tetracycline removal by ferrate. Our results showed that unaged polystyrene microplastics increased tetracycline removal by 29.2%, while three aged polystyrene microplastics showed an increased removal ratio, and ten soaked polystyrene microplastics inhibited tetracyclines removal by up to 41.6%. The breakdown of polystyrene microplastics also released small molecules and contributed to a 7.4% increase in total organic carbon. The carbonyl index of polystyrene microplastics also rose to 1.68, and specific functional groups, including C−O, C�O, Fe−O, and C−N−C, appeared on the surface. While polystyrene microplastics weakened the oxidation capacity of ferrate in removing tetracyclines, their increased surface area and pore volume aided in tetracyclines adsorption. Furthermore, polystyrene microplastics acted as support sites for Fe 3+ and Fe(OH) 3 , facilitating the formation of polystyrene-Fe-tetracycline complexes, which aided in tetracycline removal via complexation. Fe(OH) 3 helped with the adsorption and coagulation removal of tetracyclines. The potential adverse effects of polystyrene microplastics are widespread and require more attention in removing pollutants when microplastics coexist in aquatic environments.

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Complementarity and action mechanisms of Fe²⁺‐activated persulfate and H₂O₂ system

Yao

et al. 2023

Applied Organom Chemis

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The Fe 2+ -activated persulfate and H 2 O 2 (Fe 2+ /persulfate/H 2 O 2 ) system achieved 94% removal of four mixed sulfonamides with 300-s treatment and possessed excellent complementarity and stability over a wide pH (3-11) and temperature (5-65 C) range. The quenching and electron spin resonance spectroscopy results confirmed the coexistence of sulfate radicals and hydroxyl radicals in the coupled system, which were responsible for the elimination of sulfonamides under ambient conditions. The reaction rate constants of sulfate radicals and hydroxyl radicals at possible reactive sites distinguished the difference in removal ratios of four sulfonamides, according to experimental determination and density functional theory calculations. The removal ratio of sulfathiazole was higher than others because its calculated reaction rate constants of sulfate radicals and hydroxyl radicals were higher than those of sulfamerazine, sulfamethoxazole, and sulfamethazine. The finding provided a reference for investigating the removal mechanism of mixed organic pollutants in the presence of multiple free radicals.

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Complexation determines the removal of multiple tetracyclines by ferrate

Cited by 16 publications

References 52 publications

Effect of Microplastics on the Flow-Through Electro-Peroxone Process: A Computational Fluid Dynamics Simulation

Effect of Microplastics on the Flow-Through Electro-Peroxone Process: A Computational Fluid Dynamics Simulation

Effects of Polystyrene Microplastics on Multiple Tetracycline Removals by Ferrate

Complementarity and action mechanisms of Fe²⁺‐activated persulfate and H₂O₂ system

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Complexation determines the removal of multiple tetracyclines by ferrate

Cited by 16 publications

References 52 publications

Effect of Microplastics on the Flow-Through Electro-Peroxone Process: A Computational Fluid Dynamics Simulation

Effect of Microplastics on the Flow-Through Electro-Peroxone Process: A Computational Fluid Dynamics Simulation

Effects of Polystyrene Microplastics on Multiple Tetracycline Removals by Ferrate

Complementarity and action mechanisms of Fe2+‐activated persulfate and H2O2 system

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Product

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Complementarity and action mechanisms of Fe²⁺‐activated persulfate and H₂O₂ system