Enhanced oxidation of erythromycin by persulfate activated iron powder–H 2 O 2 system: Role of the surface Fe species and synergistic effect of hydroxyl and sulfate radicals

Li, Meng; Yang, Xiaofang; Wang, Dongsheng; Yuan, Jin

doi:10.1016/j.cej.2016.12.126

Cited by 59 publications

(12 citation statements)

References 41 publications

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“…44 links were established among the TPs and erythromycin. In aqueous solution, erythromycin is in equilibrium with the 6, 9-hemiketal isomer, 53 which was also identified as E-TP-734 in this study. Like those of the abovementioned MLs, the desosamine and cladinose moieties were also important reactive sites of erythromycin, leading to multiple TPs, as shown in Figure 3c and SI Text S5.…”

Section: Resultssupporting

confidence: 57%

“…Meanwhile, three groups of related dehydrated TP isomers with identical fragments were identified (E-TP-544a/b, E-TP-702a/b, and E-TP-714a/b), suggesting the existence of isomerization reaction. A previous study showed that the oxidation of erythromycin by HO • or SO 4 •– could result in the formation of spiroketals among C 9 -ketone, C 6 –OH and C 12 –OH compounds; thus, we hypothesized that E-TP-544b, E-TP-702b, and E-TP-714b might be generated from similar reactions. The “photometabolome” of erythromycin and detailed information about the TPs are shown in Figure c and SI Text S5, respectively.…”

Section: Results and Discussionmentioning

confidence: 96%

“…•− could result in the formation of spiroketals among C 9 -ketone, C 6 −OH and C 12 −OH compounds; 53 thus, we hypothesized that E-TP-544b, E-TP-702b, and E-TP-714b might be generated from similar reactions. The "photometabolome" of erythromycin and detailed information about the TPs are shown in Figure 3c and SI Text S5, respectively.…”

Section: Resultsmentioning

confidence: 99%

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Comprehensive Understanding of the Phototransformation Process of Macrolide Antibiotics in Simulated Natural Waters

et al. 2021

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This study investigated the transformation kinetics and pathways of four widely used macrolides (MLs), including roxithromycin, azithromycin, erythromycin, and clarithromycin, in dissolved organic matter (DOM) solutions under simulated solar irradiation. The results suggest that the triplet excited state of DOM plays an important role in the phototransformation of MLs. The transformation products (TPs) of MLs in the presence of natural organic matters were identified by liquid chromatography high-resolution mass spectrometry (LC-HRMS). Statistical analysis data mining procedures, including Venn diagrams and hierarchical clustering, were used to extract the TPs of the MLs. Multiple TPs for the selected MLs (roxithromycin (39), azithromycin (22), erythromycin (19), and clarithromycin (19)) were identified based on the structural information within the MS2 spectra. Most of the TPs are reported here for the first time. These TPs were mapped to the “photometabolome” networks of the MLs via linkage analysis. The results suggest that demethylation and hydroxylation are the most common reactions during the phototransformation of MLs. The products formed via N-demethylation of the desosamine moiety constitute the most abundant TPs. Overall, the combination of statistical analyses and linkage analyses of HRMS data could be a useful and promising method for predicting the degradation processes of ML antibiotics.

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Section: Resultssupporting

confidence: 57%

Section: Results and Discussionmentioning

confidence: 96%

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Comprehensive Understanding of the Phototransformation Process of Macrolide Antibiotics in Simulated Natural Waters

et al. 2021

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“…it is toxic to ecological system as well as to human health . Antibiotic degradation by zerovalent iron (ZVI) − via persulfate-mediated oxidation is known, but recently, a comparative study was done by the Hao research group to show that ZVI is most effective for the degradation of CIP compared to zerovalent aluminum (ZVA) or copper (ZVC). The removal efficiencies of CIP for ZVI, ZVA in a pH 3 medium, and ZVC in a pH 4 medium were around 84%, 73%, and 59%, respectively, signifies more production of sulfate and the hydroxyl radical by ZVI in the presence of a persulfate activator .…”

Section: Detoxification Of Edsmentioning

confidence: 99%

Detoxification of Endocrine Disruptors in Water Using Visible-Light-Active Nanostructures: A Review

UshaVipinachandran

Rajendran

Haroon

et al. 2020

ACS Appl. Nano Mater.

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The scarcity of pure water has become a global and major concern because of rapid industrialization in modern and exponentially populated civilization. No life can exist without water, and contamination-free water for the whole ecosystem is a primary demand. Therefore, the enhanced rate of water contamination and the infliction of living beings are considered to be challenging issues. It attracts great attention in the scientific community when water pollution by multifarious endocrine disruptors (EDs) such as plasticizers, herbicides, insecticides, pharmaceutical and personal care products, and food additives and sweeteners, which are discharged from industries, reach water resources, and finally appear in drinking water, is involved. The chemical contaminants of EDs disturb the functions of glands from where hormones or juices are secreted and mix with blood directly. Their persistence results in adverse toxic effects in all living beings, for example, declining reproduction, endometriosis, cancer, and many more diseases. These are not easily mineralized or removed from water compared to various organic dye molecules because of their typical characteristic light absorption in the UV region. Therefore, it is very urgent to mineralize wastewater from such types of contaminants. Among the existing technologies, visible-light-triggered photocatalytic degradation is accredited as cost-effective, renewable, and environmentally friendly. Besides, the utilization of cheap visible light as a driving force with strong mineralization efficiency under facile reaction conditions and no harmful end products enables it to have a more beneficial effect. This review describes different classes of EDs, their adverse toxic effects, and efficient degradation through remarkable active nanomaterials/nanocomposites reported from 2015 to 2020. The detailed mechanisms of pollutant adsorption on the nanostructure surface and their decomposition actions have been interpreted. Also, different pollutant degradation pathways have been attentively considered and well-explained. Besides, the future outlook has been elucidated at the end.

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“…The dual-oxidant system could reduce oxidant usage and utilize their respective advantages in removal pollutants and have faster degradation rate (Chen et al 2020;He et al 2020;Song et al 2020). The combined application of HP and PS to generate •OH and SO †À 4 has been studied to treat various pollutants including levofloxacin (Epold et al 2015), erythromycin (Li et al 2017), trichloroethylene (Yan et al 2013), 2,4-dinitrotoluene (Xu et al 2019) and even industrial wastewater (Chen et al 2020).…”

Section: Introductionmentioning

confidence: 99%

Heterogeneous activation of H2O2/Na2S2O8 with iron ore from water distribution networks for pollutant removal

Zhong

et al. 2022

Water Science and Technology

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In this study, we investigated to use the main composition of pipe deposits from water distribution networks as catalyst to activate dual-oxidant H2O2/Na2S2O8 system to produce radicals for perchloroethylene and chloramphenicol removal. According to the results, the degradation efficiency of perchloroethylene by H2O2/Na2S2O8 system was 92.05% within 8 h. Due to the slow conversion between ≡Fe3+ and ≡Fe2+, the hydroxylamine was introduced to reduce reaction time. As the results, the degradation efficiency of chloramphenicol in the H2O2/Na2S2O8 system with hydroxylamine assistance was 73.31% within 100 min. Meanwhile, several key affecting factors and the kinetic models were investigated. The primary radicals were identified by electron paramagnetic resonance and radical scavenging tests. Eleven degradation products were confirmed by high-resolution liquid chromatography-mass spectrometry. The result of this study provided the theoretical basis for resource utilization of pipe deposits in water treatment in case of emerging contamination events.

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Enhanced oxidation of erythromycin by persulfate activated iron powder–H 2 O 2 system: Role of the surface Fe species and synergistic effect of hydroxyl and sulfate radicals

Cited by 59 publications

References 41 publications

Comprehensive Understanding of the Phototransformation Process of Macrolide Antibiotics in Simulated Natural Waters

Comprehensive Understanding of the Phototransformation Process of Macrolide Antibiotics in Simulated Natural Waters

Detoxification of Endocrine Disruptors in Water Using Visible-Light-Active Nanostructures: A Review

Heterogeneous activation of H2O2/Na2S2O8 with iron ore from water distribution networks for pollutant removal

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