Fe3O4 accelerates tetracycline degradation during anaerobic digestion: Synergistic role of adsorption and microbial metabolism

Zhao, Zisheng; Zhang, Guangyi; Zhang, Yaobin; Dou, Ming; Li, Yang

doi:10.1016/j.watres.2020.116225

Cited by 106 publications

(16 citation statements)

References 58 publications

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“…This value is 2.5 times higher than that of single mesoporous g-C 3 N 4 under visible light irradiation [28]. Additionally, g-C 3 N 4 /BiPO 4 composites showed superior catalytic degradation performance in the degradation of TC, SMD, SD, and other pollutants [29][30][31].…”

Section: Introductionmentioning

confidence: 84%

Degradation of Tetracycline Hydrochloride by a Novel CDs/g-C3N4/BiPO4 under Visible-Light Irradiation: Reactivity and Mechanism

Qian

Jiang³

et al. 2022

Catalysts

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In recent years, with the large-scale use of antibiotics, the pollution of antibiotics in the environment has become increasingly serious and has attracted widespread attention. In this study, a novel CDs/g-C3N4/BiPO4 (CDBPC) composite was successfully synthesized by a hydrothermal method for the removal of the antibiotic tetracycline hydrochloride (TC) in water. The experimental results showed that the synthesized photocatalyst was crystalline rods and cotton balls, accompanied by overlapping layered nanosheet structures, and the specific surface area was as high as 518.50 m2/g. This photocatalyst contains g-C3N4 and bismuth phosphate (BiPO4) phases, as well as abundant surface functional groups such as C=N, C-O, and P-O. When the optimal conditions were pH 4, CDBPC dosage of 1 g/L, and TC concentration of 10 mg/L, the degradation rate of TC reached 75.50%. Active species capture experiments showed that the main active species in this photocatalytic system were holes (h+), hydroxyl radicals, and superoxide anion radicals. The reaction mechanism for the removal of TC by CDBPC was also proposed. The removal of TC was mainly achieved by the synergy between the adsorption of CDBPC and the oxidation of both holes and hydroxyl radicals. In this system, TC was adsorbed on the surface of CDBPC, and then the adsorbed TC was degraded into small molecular products by an attack with holes and hydroxyl radicals and finally mineralized into carbon dioxide and water. This study indicated that this novel photocatalyst CDBPC has a huge potential for antibiotic removal, which provides a new strategy for antibiotic treatment of wastewater.

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Section: Introductionmentioning

confidence: 84%

Degradation of Tetracycline Hydrochloride by a Novel CDs/g-C3N4/BiPO4 under Visible-Light Irradiation: Reactivity and Mechanism

Qian

Jiang³

et al. 2022

Catalysts

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“…Electron shuttle is a relatively simple and efficient means of direct electron transfer facilitation ( Liu et al, 2021d ). With its favorable dielectric capacity or through the cyclic transformation of oxidation and reduction states, it is possible for microorganisms to accelerate the degradation of extracellular highly toxic pollutants through electron shuttles and thus reducing the toxic effects on themselves ( Zhao Z. S. et al, 2020 ).…”

Section: Introduction To Electron Shuttlementioning

confidence: 99%

Electron shuttles enhanced the removal of antibiotics and antibiotic resistance genes in anaerobic systems: A review

et al. 2022

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The environmental and epidemiological problems caused by antibiotics and antibiotic resistance genes have attracted a lot of attention. The use of electron shuttles based on enhanced extracellular electron transfer for anaerobic biological treatment to remove widespread antibiotics and antibiotic resistance genes efficiently from wastewater or organic solid waste is a promising technology. This paper reviewed the development of electron shuttles, described the mechanism of action of different electron shuttles and the application of enhanced anaerobic biotreatment with electron shuttles for the removal of antibiotics and related genes. Finally, we discussed the current issues and possible future directions of electron shuttle technology.

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“…Particularly, the abuse of antibiotics has led to the gradual accumulation in soil and water environments, which enhances the bacterial resistance and endangers various ecosystems ( Dong et al, 2018 ; Pirsaheb et al, 2019 ). Among various antibiotics, tetracycline is the most extensively used antibiotic around the world because of its low cost and high antimicrobial activities ( Xu et al, 2020 ; Zhao et al, 2020 ). However, only a small fraction of tetracycline can be metabolized or adsorbed by humans or animals, 50–80% residuals and metabolites enter into the environment.…”

Section: Introductionmentioning

confidence: 99%

Preparation of Sepiolite Nanofibers Supported Zero Valent Iron Composite Material for Catalytic Removal of Tetracycline in Aqueous Solution

Han

Zhang

et al. 2021

Front. Chem.

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The heavy use of antibiotics in medicine, stock farming and agriculture production has led to their gradual accumulation in environmental media, which poses a serious threat to ecological environment and human safety. As an efficient and promising catalyst for the degradation of antibiotics, nanoscale zero valent iron (nZVI) has attracted increasing attention in recent years. In this study, sepiolite nanofiber supported zero valent iron (nZVI/SEP) composite was prepared via a facile and environmentally friendly method. The nZVI particles (with size of 20–60 nm) were dispersed evenly on the surface of sepiolite nanofibers, and the catalytic performance for the removal of tetracycline hydrochloride (TC-HCl) in aqueous system was investigated. The effect of nZVI loading amount, catalyst dosage, H2O2 concentration and pH on the removal efficiency of TC-HCl were studied. It was revealed that the sepiolite supporter effectively inhibited the agglomeration of nZVI particles and increased the contact area between contaminant and the active sites, resulting in the higher catalytic performance than pure nZVI material. The TC-HCl removal efficiency of nZVI/SEP composite was up to 92.67% when TC-HCl concentration of 20 mg/L, catalyst dosage of 1.0 g/L, H2O2 concentration of 1.0 mM, pH value of 7. Therefore, the nZVI/SEP composites possess high catalytic activity for TC-HCl removal and have great application prospects in antibiotic wastewater treatment.

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Fe3O4 accelerates tetracycline degradation during anaerobic digestion: Synergistic role of adsorption and microbial metabolism

Cited by 106 publications

References 58 publications

Degradation of Tetracycline Hydrochloride by a Novel CDs/g-C3N4/BiPO4 under Visible-Light Irradiation: Reactivity and Mechanism

Degradation of Tetracycline Hydrochloride by a Novel CDs/g-C3N4/BiPO4 under Visible-Light Irradiation: Reactivity and Mechanism

Electron shuttles enhanced the removal of antibiotics and antibiotic resistance genes in anaerobic systems: A review

Preparation of Sepiolite Nanofibers Supported Zero Valent Iron Composite Material for Catalytic Removal of Tetracycline in Aqueous Solution

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