Biological conversion of sulfamethoxazole in an autotrophic denitrification system

Zhang, Liang; Sun, Faqian; Wu, Dan; Yan, Wangwang; Zhou, Yan

doi:10.1016/j.watres.2020.116156

Cited by 70 publications

(15 citation statements)

References 51 publications

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“…[ 4 , 5 , 6 , 7 , 8 ] Regrettably, its effective removal is difficult to achieve via traditional methods owing to its complicated structure, harsh biodegradation conditions, and kinds of toxic degradation intermediates. [ 9 , 10 ] Therefore, to develop effective technology to realize the rapid degradation and mineralization of SMX is still a great challenge. [ 1 , 11 ]…”

Section: Introductionmentioning

confidence: 99%

Facile Synthesis of Atomic Fe‐N‐C Materials and Dual Roles Investigation of Fe‐N₄ Sites in Fenton‐Like Reactions

Wang

et al. 2021

Advanced Science

156

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Fenton-like reactions with persulfates as the oxidants have attracted increasing attentions for the remediation of emerging antibiotic pollutions. However, developing effective activators with outstanding activities and long-term stabilities remains a great challenge in these reactions. Herein, a novel activator is successfully synthesized with single iron atoms anchored on porous N-doped carbon (Fe-N-PC) by a facile chemical vapor deposition (CVD) method. The single Fe atoms are coordinated with four N atoms according to the XANES, and the Fe-N 4 -PC shows enhanced activity for the activation of peroxymonosulfate (PMS) to degrade sulfamethoxazole (SMX). The experiments and density functional theory (DFT) calculations reveal that the introduction of single Fe atoms will regulate the main active sites from graphite N into Fe-N 4 , thus could enhance the stability and tune the PMS activation pathway from non-radical into radical dominated process. In addition, the N atoms connected with single Fe atoms in the Fe-N 4 -C structure can be used to enhance the adsorption of organic molecules on these materials. Therefore, the Fe-N 4 -C here has dual roles for antibiotics adsorption and PMS activation. The CVD synthesized Fe-N 4 -C shows enhanced performance in persulfates based Fenton-like reactions, thus has great potential in the environmental remediation field.

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Section: Introductionmentioning

confidence: 99%

Facile Synthesis of Atomic Fe‐N‐C Materials and Dual Roles Investigation of Fe‐N₄ Sites in Fenton‐Like Reactions

Wang

et al. 2021

Advanced Science

156

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“…Elimination rates close to 5 mg AMP g −1 protein h −1 have been reported under nitrifying conditions when using 50 mg AMP L −1 as initial concentration, 34 whereas a rate of 0.7 mg AMP‐C g −1 VSS h −1 was determined in denitrifying batch assays amended with a mixture of 10 mg AMP‐C L −1 with acetate 36 . Small concentrations of sulfamethoxazole (20 μg L −1 ) have been eliminated in an autotrophic denitrifying SBR reactor at 4.8 ± 1.9 μg g −1 VSS d −1 57 . Several aromatic or halogenated compounds have been used as the only electron donor under organotrophic denitrifying conditions.…”

Section: Resultsmentioning

confidence: 99%

“…36 Small concentrations of sulfamethoxazole (20 μg L −1 ) have been eliminated in an autotrophic denitrifying SBR reactor at 4.8 ± 1.9 μg g −1 VSS d −1 . 57 Several aromatic or halogenated compounds have been used as the only electron donor under organotrophic denitrifying conditions. For example, when using 22.4 mg 2-CP-C L −1 in batch assays, a q 2-CP of 0.32 ± 0.04 mg 2-CP-C g −1 VSS d −1 was determined.…”

Section: Denitrifying Assays With Ampmentioning

confidence: 99%

Physiological and kinetic evaluation of ampicillin oxidation as unique electron source by a denitrifying sludge

Yeny

Texier

Flor

2022

J of Chemical Tech & Biotech

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BACKGROUND Denitrification allows the simultaneous oxidation of recalcitrant compounds and the reduction of nitrate. Scarce information on consumption and oxidation of ampicillin (AMP) as sole electron source is found in the literature. The physiological and kinetic ability of a denitrifying sludge without previous exposure to antibiotics for oxidizing several AMP concentrations was evaluated. RESULTS Complete denitrification was accomplished in batch reference assays with acetate (20–100 mg C L−1) and nitrate (C/N 1.1) within 4 h of culture, resulting in yields of HCO3− (YHCO3−) and N2 (YN2) of 0.89–1.0 mg C or N produced mg−1 C or N consumed, respectively. Assays amended with different concentrations of AMP (5–100 mg C L−1) as unique electron source at stoichiometric C/N ratio (0.86) showed that within 8–12 h of culture the antibiotic was totally consumed and oxidized to HCO3− and CO2 (YHCO3− between 0.27 and 0.67 and YCO2 between 0.35 and 0.54 mg C produced mg−1 C consumed), while nitrate was mostly reduced to N2 (YN2 = 0.77–1.0 mg N produced mg−1 N consumed). At AMP concentrations higher than 20 mg C L−1, N2O and carbon intermediates production was detected. Decreases of 20–90% in denitrifying specific rates were determined regarding the denitrifying reference. After exposure to the antibiotic, the sludge was able to recover its denitrifying activity in the absence of AMP with no N2O accumulation, whereas only 39% of the denitrification rates were recuperated. CONCLUSION It was clearly evidenced that AMP was used as electron donor for conducting denitrification; however, the denitrifying process occurred at lower specific rates. © 2021 Society of Chemical Industry (SCI).

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“…El efecto de los antibióticos sobre algunas variables cinéticas como velocidades de consumo de nitrato y formación de productos (HCO 3 -, N 2 O y N 2 ) se muestra en la Tabla 3. En el caso de antibióticos pertenecientes al grupo β-lactámico, se observa una mayor afectación en la velocidad específica de consumo de NO 3 en presencia de 18 mg de AMP y acetato (Islas-García et al, 2017) que con 10 mg/l de AMOX (Li et al, 2021), mientras que en un ensayo realizado con AMP como única fuente de electrones, las velocidades de consumo de NO 3 -, de mine-al., 2019;Zhang et al, 2019;Hassan et al, 2020;Zhang et al, 2020a;Zhang et al, 2020b;Li et al, 2021).…”

Section: Discussionunclassified

Biodegradation of antibiotics by denitrification and their effects on the physiology, kinetics, and denitrifying microbial communities

Banda-Soriano¹

2022

Hidrobiológica

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Biological conversion of sulfamethoxazole in an autotrophic denitrification system

Cited by 70 publications

References 51 publications

Facile Synthesis of Atomic Fe‐N‐C Materials and Dual Roles Investigation of Fe‐N₄ Sites in Fenton‐Like Reactions

Facile Synthesis of Atomic Fe‐N‐C Materials and Dual Roles Investigation of Fe‐N₄ Sites in Fenton‐Like Reactions

Physiological and kinetic evaluation of ampicillin oxidation as unique electron source by a denitrifying sludge

Biodegradation of antibiotics by denitrification and their effects on the physiology, kinetics, and denitrifying microbial communities

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Biological conversion of sulfamethoxazole in an autotrophic denitrification system

Cited by 70 publications

References 51 publications

Facile Synthesis of Atomic Fe‐N‐C Materials and Dual Roles Investigation of Fe‐N4 Sites in Fenton‐Like Reactions

Facile Synthesis of Atomic Fe‐N‐C Materials and Dual Roles Investigation of Fe‐N4 Sites in Fenton‐Like Reactions

Physiological and kinetic evaluation of ampicillin oxidation as unique electron source by a denitrifying sludge

Biodegradation of antibiotics by denitrification and their effects on the physiology, kinetics, and denitrifying microbial communities

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Facile Synthesis of Atomic Fe‐N‐C Materials and Dual Roles Investigation of Fe‐N₄ Sites in Fenton‐Like Reactions

Facile Synthesis of Atomic Fe‐N‐C Materials and Dual Roles Investigation of Fe‐N₄ Sites in Fenton‐Like Reactions