High efficiency degradation of tetracycline by peroxymonosulfate activated with Fe/NC catalysts: Performance, intermediates, stability and mechanism

Peng, Xiaoming; Wu, Jianqun; Zhao, Zilong; Wang, Xing; Hirata, Dai; Li, Yiming; Yang, Wei; Xu, Gaoping; Hu, Fengping

doi:10.1016/j.envres.2021.112538

Cited by 58 publications

(5 citation statements)

References 57 publications

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“…In pathway I, P1 ( m / z = 453) was produced by demethylated electron reduction. The intermediate P8 was then further attacked by ROS produced in the ZIF-67/BiOCl system, transforming it into P2 ( m / z = 340) . In pathway II, the P4 ( m / z = 401) and P5 ( m / z = 342) were generated by the C–N bond cleavage.…”

Section: Resultsmentioning

confidence: 99%

“…The high conjugation system is conducive to the stabilization of the intermediates and the further degradation of RhB. 56 57 In pathway II, the P4 (m/z = 401) and P5 (m/z = 342) were generated by the C−N bond cleavage. In pathway III, P3 (m/z = 431) and P6 (m/z = 417) were generated by the one and two N− dealkylation reactions of TC.…”

Section: Optical and Electrochemicalmentioning

confidence: 99%

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ZIF-67/BiOCl Z-Scheme Heterojunction Photocatalyst for Photodegradation of Organic Dyes and Antibiotics

Wu,

Zhou,

Tai

et al. 2023

ACS Appl. Nano Mater.

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Z-scheme heterojunction photocatalysts with excellent redox capability show great potential in the field of environmental remediation. In this research, ZIF-67 and BiOCl were used to construct metal–organic framework (MOF)-based heterostructures, which effectively achieved 97.4% rhodamine B (RhB) degradation and 78.2% tetracycline (TC) degradation under visible light irradiation. The cyclic experiments displayed that 15% ZIF-67/BiOCl remained structurally stable after 4 cycles. Reactive species trapping demonstrates that 1O2 and ·O2 – were mainly responsible for RhB and TC degradation, which were inoculated with EPR results. This work also reveals the degradation path and mechanism of heterojunction, which provides insight into the synthesis of superior photocatalysts for environmental remediation.

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Section: Resultsmentioning

confidence: 99%

Section: Optical and Electrochemicalmentioning

confidence: 99%

ZIF-67/BiOCl Z-Scheme Heterojunction Photocatalyst for Photodegradation of Organic Dyes and Antibiotics

Wu,

Zhou,

Tai

et al. 2023

ACS Appl. Nano Mater.

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“…Specifically, the SA degradation rate was 78, 83, and 99% in lake water, tap water, and DI water, respectively, showing its great potential in practical waste water treatment. The lower efficiency may have resulted from the consumption of radicals by anions in tap water and by anions and natural organic matter in lake water. , …”

Section: Results and Discussionmentioning

confidence: 99%

“…The lower efficiency may have resulted from the consumption of radicals by anions in tap water and by anions and natural organic matter in lake water. 39,40 Simultaneous Removal of SA and Pb(II). To evaluate the performance of hollow Ni/Co LDH for the simultaneous removal of Pb and organic pollutants, the adsorption capacity of different samples toward Pb in water was investigated first.…”

Section: Industrial and Engineeringmentioning

confidence: 99%

Synergetic Removal of Pb(II)- and Sulfonamide-Mixed Pollutants using Ni/Co Layered Double Hydroxide Nanocages Coupled with Peroxymonosulfate

Jin

Yan

et al. 2022

Ind. Eng. Chem. Res.

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Organic pollutants are often present in wastewater coupled with toxic metallic ions, which are harmful to both human beings and the ecological environment, and their simultaneous removal is of great significance. In this work, hollow Ni/Co layered double hydroxide (LDH) nanocages were synthesized through the hydrothermal method by using zeolitic imidazolate framework-67 as a self-sacrificial template, and it was further used as a catalyst to activate peroxymonosulfate (PMS) for sulfonamide (SA) degradation and an adsorbent for Pb(II) removal simultaneously. The materials were characterized using various techniques, and the effect of parameters including the dosage of the catalyst and PMS, initial temperature, and pH on the performances of the LDH nanocage was investigated. Nearly 80% of SA (15 mg/L) could be degraded via PMS activation, whereas ∼93% of Pb(II) (20 mg/L) could be removed simultaneously within 60 min. During the reaction, there were redox cycles for both Co and Ni over the surface of LDH, but Pb did not participate in the process, and it had a slightly negative effect on SA degradation. The quenching experiments and the electron paramagnetic resonance results showed that the radicals ( • OH,, and 1 O 2 ) generated from PMS activation participated in the process. Finally, the possible mechanism and degradation pathways were proposed, based on the intermediate products identified, and the toxicity of the intermediate products was evaluated.

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“…In addition to the magnetization treatment discussed earlier, pre- or post-treatment of biochar with a combination of Fe and N compounds (Fe/N co-doped biochar) has also been realized as a successful approach for the degradation and removal of organic pollutants. − The hybrid biomass feedstock (CM and SM) used in this study is a nitrogen-rich material containing abundant N sites to coordinate Fe (or other available metals) to form C–N–Fe (or C–N–metal) bonds, making an efficient and cost-effective substance with a high capacity to remove pollutants from the environment. The primitive red algae, CM, used in this study is a low-lipid small microorganism (1.5 μm in diameter) living in thermal acidic environments (pH 1.5, 45 °C) such as hot springs and geysers in volcanic areas such as Yellowstone National Park in the US and Java in Indonesia CM is rich in carbohydrates and proteins.…”

Section: Introductionmentioning

confidence: 99%

Iron-Rich Biochar to Adsorb Volatile Organic Compounds Emitted from Asphalt-Surfaced Areas

Mousavi

Aldagari

Crocker

et al. 2023

ACS Sustainable Chem. Eng.

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This study introduces iron-rich biochar to selectively adsorb some volatile organic compounds (VOCs) emitted from asphalt-surfaced areas. Adsorption and retention of VOCs can improve the air quality while reducing asphalt’s mass loss which compromises asphalt’s durability. The iron-rich biochar was made from a hybrid feedstock of Cyanidioschyzon merolae (CM) algae and swine manure (SM) with a blend of 20:80 CM/SM, showing the highest biochar yield of 27 wt % and the highest metal content of Fe (21.8 g kg–1). Comparison of VOC adsorption of iron-rich biochar and low-iron biochar shows the significant role of Fe content in adsorption of VOCs. When the iron-rich biochar was introduced to asphalt, a total emission reduction of 76% was observed; this number was only 59% when low-iron biochar was used. The superiority of iron-rich biochar over low-iron biochar in adsorbing volatiles is observed for some specific volatiles such as non-polar aromatics in our experiment. The dominant contribution of lightweight cyclic aromatics and alkanes in bitumen emissions indicates that minimizing the VOC emissions from saturate and aromatic fractions of bitumen could be a key factor in reducing the VOCs from asphalt. The hybrid biomass feedstock used here is also a nitrogen-rich substance containing abundant N sites to coordinate with Fe to form −C–N–Fe bonds. To understand the role of N–Fe functionals in the higher efficacy of Fe-rich biochar, density functional theory (DFT) calculations were performed on three O-containing compounds (benzoic acid, benzofuran, and hexanal) and three S-containing compounds (dibenzothiophene, 3-pentylthiophene, and hexanethiol). Based on DFT results, the adsorption energies of VOCs on active sites of Fe–biochar (containing −N–Fe functionals) are 8 to 10 times higher than those for pristine biochar (containing just N groups). It was also found that the presence of iron stimulates the catalytic performance of biochar, as evidenced by our DFT results, indicating degradation of dibenzothiophene and hexanethiol on the N–Fe active zones of iron-rich biochar. Application of iron-rich biochar can suppress the volatiles emitted from asphalt-surfaced areas; this in turn can improve the air quality and extend the service life of roadway infrastructures. Therefore, the study outcomes can promote built environment’ sustainability and public health.

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High efficiency degradation of tetracycline by peroxymonosulfate activated with Fe/NC catalysts: Performance, intermediates, stability and mechanism

Cited by 58 publications

References 57 publications

ZIF-67/BiOCl Z-Scheme Heterojunction Photocatalyst for Photodegradation of Organic Dyes and Antibiotics

ZIF-67/BiOCl Z-Scheme Heterojunction Photocatalyst for Photodegradation of Organic Dyes and Antibiotics

Synergetic Removal of Pb(II)- and Sulfonamide-Mixed Pollutants using Ni/Co Layered Double Hydroxide Nanocages Coupled with Peroxymonosulfate

Iron-Rich Biochar to Adsorb Volatile Organic Compounds Emitted from Asphalt-Surfaced Areas

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