Article
Engineering, Chemical
Zohreh Akbari Jonoush, Abbas Rezaee, Ali Ghaffarinejad
Summary: The present study proposes an effective system for Escherichia coli (E. coli) disinfection using an electrocatalytic system with a Ni-Fe/Fe3O4 nanocomposite cathode. The system enhances the inactivation of bacteria using Fe3O4 nanoparticles and humic acid (HA). The experimental results show that the proposed system achieves complete E. coli inactivation in 12 minutes with low energy consumption. Adding nitrate to the system increases the time required for disinfection due to the reaction of chlorine compounds with byproducts of nitrate reduction. The study highlights the capability of the Ni-Fe/Fe3O4 nanocomposite electrode for water disinfection and nitrate reduction.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Engineering, Environmental
Gabrielle M. String, Yarmina Kamal, David M. Gute, Daniele S. Lantagne
Summary: This study evaluated the efficacy of disinfection with 0.5% NaOCl against Phi6 virus on various surfaces and under different environmental conditions. The results showed that non-porous surfaces had better disinfection efficacy, while wood had relatively poor disinfection efficacy. The study highlighted the recoverability of Phi6 virus on a range of surfaces and confirmed the effectiveness of chlorine disinfection.
JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH PART A-TOXIC/HAZARDOUS SUBSTANCES & ENVIRONMENTAL ENGINEERING
(2022)
Article
Chemistry, Multidisciplinary
Akhila M. Nair, Ashish Kumar, Najmul H. Barbhuiya, Swatantra P. Singh
Summary: Pathogenic virus inactivation is crucial to ensure safe drinking water. Conventional disinfection methods have drawbacks, while emerging techniques like electrochemical disinfection using graphene-based electrodes provide new opportunities. In this study, titanium suboxide-doped laser-induced graphene (LIG-TSO) electrodes and filters were fabricated for electrochemical virus inactivation. The highest inactivation was achieved using LIG-TiO(x)10 electrodes at 2.5 V, and complete removal of viruses was achieved using LIG-TiOx filters at 2.5 V for MS2 and 10 V for T4 and Phi6. The study identified the inactivation mechanism combining nanofiber-enhanced electroporation and electrochemically generated reactive species. This work will contribute to the design of electrochemical disinfection devices for water purification applications.
ENVIRONMENTAL SCIENCE-NANO
(2023)
Article
Veterinary Sciences
Charlotte R. Marquis, Tamara Gull, John Dodam, Lori Thombs, Alex Bukoski
Summary: This study compared the efficacy of four cleaning protocols for endotracheal tubes in anesthetized dogs. The survey results revealed that some veterinary anesthesiologists reused tubes without sterilization and there was a wide variation in cleaning methods. However, no significant differences were found between the tested protocols. Further research is needed to identify a safe and effective cleaning protocol for endotracheal tubes in small animal practice.
JAVMA-JOURNAL OF THE AMERICAN VETERINARY MEDICAL ASSOCIATION
(2023)
Article
Environmental Sciences
Lais Gimenes Vernasqui, Gessica de Oliveira Santiago Santos, Julia Isidro, Taynara Oliveira Silva, Marcos Roberto de Vasconcelos Lanza, Cristina Saez, Neidenei Gomes Ferreira, Manuel Andres Rodrigo Rodrigo
Summary: The use of electrochemically assisted disinfection is an important technology for reclaiming treated wastewater. In this study, a new coating material U-NBDD was evaluated as an electrode and compared to a standard electrode. The results showed that U-NBDD electrode had better disinfection performance than the standard electrode at low current densities, and it could prevent the formation of chlorates and perchlorates.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Biochemistry & Molecular Biology
David Welch, David J. Brenner
Summary: Far-UVC lighting is gaining attention as an effective antimicrobial technology with minimal health hazards, and the use of OrthoChromic OC-1 film provides a simple and accurate method for measuring ultraviolet radiation exposure, potentially useful for health hazard monitoring in spaces with far-UVC lighting installations.
PHOTOCHEMISTRY AND PHOTOBIOLOGY
(2021)
Article
Electrochemistry
Geletu Qing, Mojtaba Abolhassani, Raheleh Daneshpour, Shelby L. Foster, Marty Matlock, Greg Thoma, Lauren F. Greenlee
Summary: This study conducted electrochemical disinfection experiments on natural irrigation water from the Waiahole Ditch Irrigation System in Hawaii using a batch cell with titanium electrodes. The results showed that under specific conditions, E. coli can be efficiently eliminated, with disinfection byproducts meeting drinking water standards.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2021)
Article
Biochemistry & Molecular Biology
Lucy G. Sinclair, Zornitsa Ilieva, Georgina Morris, John G. Anderson, Scott J. MacGregor, Michelle Maclean
Summary: This study investigates the efficacy of a low irradiance 405-nm light environmental decontamination system for the inactivation of bacteriophage phi6 as a surrogate for SARS-CoV-2. Complete/near-complete inactivation was demonstrated in all cases, with significantly enhanced reductions observed in biologically relevant media. The findings establish the efficacy of low irradiance 405-nm light systems for inactivation of a SARS-CoV-2 surrogate and demonstrate the significant enhancement in susceptibility when suspended in saliva, which is a major vector in COVID-19 transmission.
PHOTOCHEMISTRY AND PHOTOBIOLOGY
(2023)
Article
Food Science & Technology
Mohammadreza Dehghan Abnavi, Chandrasekhar R. Kothapalli, Daniel Munther, Parthasarathy Srinivasan
Summary: This study presented a modified disinfection kinetics model to evaluate the effect of organic content on the chlorine inactivation coefficient, showing a significant decrease in bactericidal efficacy of free chlorine in the presence of organic load. The chlorine inactivation coefficient of Escherichia coli O157:H7 decreased by 73% with higher levels of chemical oxygen demand (COD). Initial chlorine concentration and bacterial load were found to have no effect on the chlorine inactivation coefficient.
INTERNATIONAL JOURNAL OF FOOD MICROBIOLOGY
(2021)
Article
Engineering, Environmental
Giannis-Florjan Norra, Luis Baptista-Pires, Elisabeth Cuervo Lumbaque, Carles M. Borrego, Jelena Radjenovic
Summary: Graphene sponge electrodes were utilized for chlorine-free inactivation of Escherichia coli from low conductivity water, achieving complete E. coli inactivation through electrosorption and electroporation, with additional killing of bacteria due to damaged cell membranes in stored electrochemically treated samples. The use of intermittent current significantly reduced energy consumption for E. coli removal in tap water, showcasing the potential of graphene for efficient electro-disinfection without the formation of toxic byproducts.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Agriculture, Dairy & Animal Science
T. Dzieciolowski, S. Boqvist, J. Ryden, I Hansson
Summary: This study evaluated the effectiveness of the disinfection procedure currently used in a large slaughter plant in Sweden. The combination of chemical disinfectant and hot air drying was found to be the most effective treatment in reducing the presence and amount of bacteria. However, this treatment is energy-consuming and would require technical changes, increasing operating costs.
Article
Environmental Sciences
Davide Vettori, Costantino Manes, Davide Dalmazzo, Luca Ridolfi
Summary: Contrary to previous studies, high shear stresses do not affect the viability of Escherichia coli, and it can resist high shear forces under certain hydrodynamic conditions.
Article
Engineering, Environmental
Aradhana Basu, Meerambika Behera, Rojali Maharana, Manish Kumar, Nabin Kumar Dhal, Ashok J. Tamhankar, Amrita Mishra, Cecilia Stalsby Lundborg, Suraj K. Tripathy
Summary: The study introduced a method for disinfecting waterborne Escherichia coli using biochar supported maghemite nanoparticles (M/biochar) in a photo-Fenton like reaction, which was more effective than using only maghemite nanoparticles. Experimental evidence showed that the process compromised the bacterial cell membrane and hydroxyl radicals may be responsible for disinfecting E. coli. The proposed method was successfully tested on real water samples contaminated with E. coli without inducing toxicity on maize plant growth, indicating potential for real world applications.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Biotechnology & Applied Microbiology
S. Aparicio-Vazquez, C. Fall, M. Islas-Espinoza, D. Alcantara, V Petranovskii, M. T. Olguin
Summary: The study investigated the conditioning parameters and characterization of silver-modified clinoptilolite-rich tuffs, as well as their bactericidal activity against Escherichia coli. The results show that the inhibition rate of E. coli depends on the release of silver from the modified zeolitic materials and the location of silver ions in the zeolite network. Materials conditioned at room temperature in static contact exhibited the highest bacterial inhibition rate.
ENVIRONMENTAL TECHNOLOGY & INNOVATION
(2021)
Article
Engineering, Environmental
Diego Francisco Sanchez, Lina Kisieliene, Sabine Lindholst, Alexander Valentin Hansen, Jesper Sanderbo, Birgitte Krogh Loppenthien, Thomas Eilkaer, Natascha Kock Pedersen, Jan Jorgensen, Caroline Kragelund, Henrik Rasmus Andersen, Ravi Kumar Chhetri
Summary: The study investigated the removal of multi-resistant and ciprofloxacin-resistant bacteria from municipal and hospital untreated wastewater using peracetic acid (PAA). The results showed that PAA was an effective disinfectant in reducing the risk of multi-resistant and ciprofloxacin-resistant bacteria.
ENVIRONMENTAL SCIENCE-WATER RESEARCH & TECHNOLOGY
(2022)