Treated domestic sewage: kinetics of Escherichia coli and total coliform inactivation by oxidation with hydrogen peroxide

Vargas, Gean Delise Leal Pasquali; Moreira, Regina de Fátima Peralta Muniz; Spricigo, Deisi; José, Humberto Jorge

doi:10.1590/s0100-40422013000200009

Cited by 10 publications

(9 citation statements)

References 10 publications

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“…Although a trend was observed in Study 1, no significant differences could be proven between the bactericidal activity of the 250, 300 and 350 mg.L -1 H 2 O 2 treatments. Similar results were seen in a study done by Vargas et al [8] where little statistical significant variation was found between the following H 2 O 2 concentrations: 100, 150, 200, 250 and 300 mg.L -1 . ATCC 35218 was the most resistant ATCC strain to H 2 O 2 treatment.…”

Section: Discussionsupporting

confidence: 91%

“…Factors such as concentration, contact time and organic matter content can all influence the efficacy of H 2 O 2 as a treatment option [7,8]. Presence of catalases might furthermore contribute to microbial tolerance at lower concentrations [9].…”

Section: Introductionmentioning

confidence: 99%

“…Generally there is limited literature available on H 2 O 2 concentrations used for irrigation water treatment. Studies on wastewater have, however, shown that a 250 mg.L -1 H 2 O 2 treatment resulted in a 2.2 log reduction after 120 min [10], and that the organic matter content in water can also decrease the efficiency of H 2 O 2 treatment [8]. H 2 O 2 has been used for microbial inactivation of a variety of viruses and other pathogenic microorganisms, as well as for both gram positive and gram negative vegetative bacteria [11].…”

Section: Introductionmentioning

confidence: 99%

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Impact of Hydrogen Peroxide Treatment on Environmental <i>Escherichia coli</i> Strains

Giddey

Kidd²,

Britz³

et al. 2015

JAEM

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The impact of three hydrogen peroxide (H 2 O 2) concentrations (250, 300 and 350 mg.L-1) at 30, 60, 90 and 120 min time intervals was determined on environmental and ATCC reference E. coli strains (n=11). Variation between strains was evident and treatment resulted in significantly different log reductions after the 120 min contact time. The environmental strains were generally more resistant than the reference strains. A H 2 O 2 resistant environmental strain (M53) and a potential pathogenic strain (W1371) were used to determine bactericidal effect at higher (and a lower) H 2 O 2 concentrations of 50, 350, 700 and 1 000 mg.L-1 on the microbial inactivation. Bacterial inactivation increased as concentration increased, with 50 mg.L-1 resulting in low microbial inactivation and 1 000 mg.L-1 resulting in an effective (>4 log) reduction. A significant difference in microbial reduction was not observed at H 2 O 2 concentrations between 350 and 700 mg.L-1. The potential influence of the COD (chemical oxygen demand) of river water on the H 2 O 2 treatment was also determined. It was observed that the water COD, at the levels investigated, might influence H 2 O 2 efficacy treatment over shorter treatment times (30 min), but not over longer periods (90-120 min). Different levels of catalase activity were also measured for the test strains. A trend was observed between H 2 O 2 resistance and an increased amount of HPII catalase activity. However, it was also observed that E. coli can also employ other protection mechanisms, as two of the most resistant environmental E. coli strains only indicated average catalase activity.

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Section: Discussionsupporting

confidence: 91%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Impact of Hydrogen Peroxide Treatment on Environmental <i>Escherichia coli</i> Strains

Giddey

Kidd²,

Britz³

et al. 2015

JAEM

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“…Among all the chemical disinfection approaches, Fenton reaction, mainly benefiting from the powerful oxidation capability of hydroxyl radical derivatives produced from hydrogen peroxide and catalysts (e.g., iron (II)), has been proven highly effective on disinfection process [4,5]. This disinfectant presents disinfection efficacy in a relative wide spectrum of microbes including but not limited to bacteria, viruses and spores, by launching an attack on cell membrane, nucleic acid molecules, etc.…”

Section: Introductionmentioning

confidence: 99%

“…Secondly, the supply of H 2 O 2 is also limited by safety risks of transportation and storage so as to be restrained in many fields. 4 electro-Fenton systems is based a typical BES termed microbial fuel cell (MFC) [13][14][15]. In this system, oxygen is reduced to H 2 O 2 through a two-electron reduction pathway (eq.…”

Section: Introductionmentioning

confidence: 99%

Microbial electrolytic disinfection process for highly efficient Escherichia coli inactivation

Zhou

Huang

et al. 2018

Chemical Engineering Journal

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Water quality deterioration caused by a wide variety of recalcitrant organics and pathogenic microorganisms has become a serious concern worldwide. Bio-electro-Fenton systems have been considered as cost-effective and highly efficient water treatment platform technology. While it has been extensively studied for recalcitrant organics removal, its application potential towards water disinfection (e.g., inactivation of pathogens) is still unknown. This study investigated the inactivation of Escherichia coli in a microbial electrolysis cell based bio-electro-Fenton system (renamed as microbial electrolytic-Fenton cell) with the aim to broad the application of microbial electrochemistry. Results showed that a 4-log reduction of Escherichia coli (10 7 to hundreds CFU/mL) was achieved with an external applied voltage of 0.2 V, 0.3 mM Fe 2+ and cathodic pH of 3.0. However, non-notable inactivation was observed in the control experiments without external voltage or Fe 2+ dose. The disinfection effect was enhanced when cathode air flow rate increased from 7 to 41 mL/min and was also in proportion to the increase of Fe 2+ concentration from 0.15 to 0.45 mmol/mL. Fatal cell membrane destruction by •OH was identified as one potential mechanism for disinfection. This study successfully demonstrated the feasibility of bio-electro-Fenton process for pathogens inactivation, which offers insight for the future development of sustainable, efficient, and cost-effective biological water treatment technology.

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Co‐based Nanozymatic Profiling: Advances Spanning Chemistry, Biomedical, and Environmental Sciences

Li,

Cai,

Jiang

et al. 2023

Advanced Materials

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Nanozymes, next‐generation enzyme‐mimicking nanomaterials, have entered an era of rational design; among them, Co‐based nanozymes have emerged as captivating players over times. Co‐based nanozymes were developed and have garnered significant attention over the past five years. Their extraordinary properties, including regulatable enzymatic activity, stability, and multifunctionality stemming from magnetic properties, photothermal conversion effects, cavitation effects, and relaxation efficiency, have made Co‐based nanozymes a rising star. This review presents the first comprehensive profiling of the Co‐based nanozymes in the chemistry, biology, and environmental sciences. The review begins by scrutinizing the various synthetic methods employed for Co‐based nanozyme fabrication, such as template and sol‐gel methods, highlighting their distinctive merits from a chemical standpoint. Furthermore, we provide a detailed exploration of their wide‐ranging applications in biosensing and biomedical therapeutics, as well as their contributions to environmental monitoring and remediation. Notably, drawing inspiration from state‐of‐the‐art techniques such as omics, a comprehensive analysis of Co‐based nanozymes is undertaken, employing analogous statistical methodologies to provide valuable guidance. To conclude, we present a comprehensive outlook on the challenges and prospects for Co‐based nanozymes, spanning from microscopic physicochemical mechanisms to macroscopic clinical translational applications.This article is protected by copyright. All rights reserved

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Treated domestic sewage: kinetics of Escherichia coli and total coliform inactivation by oxidation with hydrogen peroxide

Cited by 10 publications

References 10 publications

Impact of Hydrogen Peroxide Treatment on Environmental <i>Escherichia coli</i> Strains

Impact of Hydrogen Peroxide Treatment on Environmental <i>Escherichia coli</i> Strains

Microbial electrolytic disinfection process for highly efficient Escherichia coli inactivation

Co‐based Nanozymatic Profiling: Advances Spanning Chemistry, Biomedical, and Environmental Sciences

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