Enhancement of E. coli inactivation by photosensitized erythrosine-based solar disinfection under weakly acidic conditions

Liu, Yi; Dong, Wende; Shen, Shuyi; Meng, Fan-Xu; Wang, Jiajia; Yang, Kun; Lin, Daohui

doi:10.1016/j.watres.2022.118125

Cited by 14 publications

(23 citation statements)

References 69 publications

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“…The dianion structure of EB is generally uncontroversial, mainly in the form of carboxylate [10b] . In the charge distribution analysis of [EB] 2− , O27, O28, O29 and O31 showed the most concentrated charge and were more inclined to accept the first proton.…”

Section: Resultsmentioning

confidence: 99%

Catalyst‐Free Photochemical Activation of Peroxymonosulfate in Xanthene‐Rich Systems for Fenton‐Like Synergistic Decontamination: Efficacy of Proton Transfer Process

et al. 2023

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Catalyst-free visible light assisted Fenton-like catalysis offers opportunities to achieve the sustainable water decontamination, but the synergistic decontamination mechanisms are still unclear, especially the effect of proton transfer process (PTP). The conversion of peroxymonosulfate (PMS) in photosensitive dye-enriched system was detailed. The photo-electron transfer between excited dye and PMS triggered the efficient activation of PMS and enhanced the production of reactive species. Photochemistry behavior analysis and DFT calculations revealed that PTP was the crucial factor to determine the decontamination performance, leading to the transformation of dye molecules. The excitation process inducing activation of whole system was composed of low energy excitations, and the electrons and holes were almost contributed by LUMO and HOMO. This work provided new ideas for the design of catalyst-free sustainable system for efficient decontamination.

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Section: Resultsmentioning

confidence: 99%

Catalyst‐Free Photochemical Activation of Peroxymonosulfate in Xanthene‐Rich Systems for Fenton‐Like Synergistic Decontamination: Efficacy of Proton Transfer Process

et al. 2023

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“…A surface water and a secondary effluent sample were collected from the Xihu Lake in Hangzhou City and Hongyu wastewater treatment plant in Zhuji City, China, respectively, to examine the effect of natural water samples on eARG degradation. These water samples were employed and characterized in previous studies, , and the characterization methods and results are summarized in Text S4 and Table S3, respectively. All water samples were filtered with a 0.22 μm filter membrane and stored at 4 °C.…”

Section: Materials and Methodsmentioning

confidence: 99%

Nematodes Degrade Extracellular Antibiotic Resistance Genes by Secreting DNase II Encoded by the nuc-1 Gene

Dong,

Liu,

Hou

et al. 2023

Environ. Sci. Technol.

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This study investigated the degradation performance and mechanism of extracellular antibiotic resistance genes (eARGs) by nematodes using batch degradation experiments, mutant strain validation, and phylogenetic tree construction. Caenorhabditis elegans, a representative nematode, effectively degraded approximately 99.999% of eARGs (tetM and kan) in 84 h and completely deactivated them within a few hours. Deoxyribonuclease (DNase) II encoded by nuc-1 in the excretory and secretory products of nematodes was the primary mechanism. A neighbor-joining phylogenetic tree indicated the widespread presence of homologs of the NUC-1 protein in other nematodes, such as Caenorhabditis remanei and Caenorhabditis brenneri, whose capabilities of degrading eARGs were then experimentally confirmed. C. elegans remained effective in degrading eARGs under the effects of natural organic matter (5, 10, and 20 mg/L, 5.26–6.22 log degradation), cation (2.0 mM Mg2+ and 2.5 mM Ca2+, 5.02–5.04 log degradation), temperature conditions (1, 20, and 30 °C, 1.21–5.26 log degradation), and in surface water and wastewater samples (4.78 and 3.23 log degradation, respectively). These findings highlight the pervasive but neglected role of nematodes in the natural decay of eARGs and provide novel approaches for antimicrobial resistance mitigation biotechnology by introducing nematodes to wastewater, sludge, and biosolids.

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“…ERY-based disinfection has been previously proposed as a sunlight-driven water disinfection technology. The light intensity (200 mW/cm 2 ) used in this study is about 2/3 of the real sunlight intensity (∼300 mW/cm 2 ) . Thus, sunlight-driven ERY-based disinfection technology is expected to achieve effective wastewater disinfection with no energy cost.…”

Section: Environmental Implicationsmentioning

confidence: 99%

“…The removal of ARB, iARGs, and eARGs by photosensitized ERY was examined at pH 4.0, since this pH condition exhibited the highest bacterial inactivation efficiency based on our previous study. 29 A xenon lamp was used as the visible light (VL) source with a cut-off filter (λ ≥ 420 nm) and a light intensity of 200 mW/cm 2 . The total volume of the reaction solution is 50 mL in a 100 mL open beaker, with light irradiating vertically from above.…”

Section: Bacteria Inactivation and Argmentioning

confidence: 99%

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Efficient Degradation of Intracellular Antibiotic Resistance Genes by Photosensitized Erythrosine-Produced ¹O₂

Liu

Dong

Jiang

et al. 2023

Environ. Sci. Technol.

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Intracellular antibiotic resistance genes (iARGs) constitute the important part of wastewater ARGs and need to be efficiently removed. However, due to the dual protection of intracellular DNA by bacterial membranes and the cytoplasm, present disinfection technologies are largely inefficient in iARG degradation. Herein, we for the first time found that erythrosine (ERY, an edible dye) could efficiently degrade iARGs by producing abundant 1 O 2 under visible light. Seven log antibiotic-resistant bacteria were inactivated within only 1.5 min, and 6 log iARGs were completely degraded within 40 min by photosensitized ERY (5.0 mg/L). A linear relationship was established between ARG degradation rate constants and 1 O 2 concentrations in the ERY photosensitizing system. Surprisingly, a 3.2-fold faster degradation of iARGs than extracellular ARGs was observed, which was attributed to the unique indirect oxidation of iARGs induced by 1 O 2 . Furthermore, ERY photosensitizing was effective for iARG degradation in real wastewater and other photosensitizers (including Rose Bengal and Phloxine B) of high 1 O 2 yields could also achieve efficient iARG degradation. The findings increase our knowledge of the iARG degradation preference by 1 O 2 and provide a new strategy of developing technologies with high 1 O 2 yield, like ERY photosensitizing, for efficient iARG removal.

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Enhancement of E. coli inactivation by photosensitized erythrosine-based solar disinfection under weakly acidic conditions

Cited by 14 publications

References 69 publications

Catalyst‐Free Photochemical Activation of Peroxymonosulfate in Xanthene‐Rich Systems for Fenton‐Like Synergistic Decontamination: Efficacy of Proton Transfer Process

Catalyst‐Free Photochemical Activation of Peroxymonosulfate in Xanthene‐Rich Systems for Fenton‐Like Synergistic Decontamination: Efficacy of Proton Transfer Process

Nematodes Degrade Extracellular Antibiotic Resistance Genes by Secreting DNase II Encoded by the nuc-1 Gene

Efficient Degradation of Intracellular Antibiotic Resistance Genes by Photosensitized Erythrosine-Produced ¹O₂

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Enhancement of E. coli inactivation by photosensitized erythrosine-based solar disinfection under weakly acidic conditions

Cited by 14 publications

References 69 publications

Catalyst‐Free Photochemical Activation of Peroxymonosulfate in Xanthene‐Rich Systems for Fenton‐Like Synergistic Decontamination: Efficacy of Proton Transfer Process

Catalyst‐Free Photochemical Activation of Peroxymonosulfate in Xanthene‐Rich Systems for Fenton‐Like Synergistic Decontamination: Efficacy of Proton Transfer Process

Nematodes Degrade Extracellular Antibiotic Resistance Genes by Secreting DNase II Encoded by the nuc-1 Gene

Efficient Degradation of Intracellular Antibiotic Resistance Genes by Photosensitized Erythrosine-Produced 1O2

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Efficient Degradation of Intracellular Antibiotic Resistance Genes by Photosensitized Erythrosine-Produced ¹O₂