Inactivation of Clostridium perfringens spores and vegetative cells by photolysis and TiO2 photocatalysis with H2O2

Lanao, M.; Ormad, María P.; Goñi, Pilar; Miguel, Natividad; Mosteo, Rosa; Ovelleiro, J.L.

doi:10.1016/j.solener.2010.01.023

Cited by 40 publications

(20 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The usefulness of photocatalysis for the disinfection of water has been shown by the destructive effects it has on a wide range of microorganisms i.e. bacteria [33][34][35][36][37][38][39][40][41][42][43] viruses [44][45][46][47], fungi [48][49][50][51][52] and protozoa [53][54][55].…”

Section: Photocatalytic Destruction Of Micro-organismsmentioning

confidence: 99%

Removal of microorganisms and their chemical metabolites from water using semiconductor photocatalysis

Robertson

Bahnemann

2012

Journal of Hazardous Materials

190

View full text Add to dashboard Cite

Semiconductor photocatalysis has been applied to the remediation of an extensive range of chemical pollutants in water over the past 30 years. The application of this versatile technology for removal of micro-organisms and cyanotoxins has recently become an area that has also been the subject of extensive research particularly over the past decade. This paper considers recent research in the application of semiconductor photocatalysis for the treatment of water contaminated with pathogenic micro-organisms and cyanotoxins. The basic processes involved in photocatalysis are described and examples of recent research into the use of photocatalysis for the removal of a range of microorganisms are detailed. The paper concludes with a review of the key research on the application of this process for the removal of chemical metabolites generated from cyanobacteria.

show abstract

Section: Photocatalytic Destruction Of Micro-organismsmentioning

confidence: 99%

Removal of microorganisms and their chemical metabolites from water using semiconductor photocatalysis

Robertson

Bahnemann

2012

Journal of Hazardous Materials

190

View full text Add to dashboard Cite

show abstract

“…This general feature is also common to other endospore‐forming genera (Bacillus and Thermoactynomycetes) and protects the DNA backbone from damage (Setlow, ). Lanao et al () observed a 1.2 log inactivation of C. perfringens vegetative cells in river water after a 5‐min exposure to light (λ 320–800 nm), whereas endospores were only inactivated by <0.5 log after 30 min light exposure. Importantly, the light penetration depth (LPD) (depth at which surface light intensity is reduced by 99%) in soils can be as little as 300 μm (Ciani et al, ).…”

Section: Environmental Factors Affecting Clostridial Survival and Gromentioning

confidence: 99%

A review of the abundance, behaviour and detection of clostridial pathogens in agricultural soils

Palmer

Hough

West

et al. 2019

European J Soil Science

View full text Add to dashboard Cite

The soil is a reservoir for various clostridial pathogens, with agricultural soils representing a major source of contamination for overlying crops and grazing livestock. Understanding the prevalence and behaviour of pathogens in these soils is fundamental to ascertaining and mitigating the risk of disease from agroecosystems. This article reviews research pertaining to the overall distribution and abundance of clostridial pathogens in the soil while identifying possible environmental and soil factors influencing their behaviour. Large‐scale soil screens have identified pathogens across the globe, although some Clostridium botulinum toxinotypes are more prevalent in certain geographic regions. Faecal inputs and organic waste amendments to the soil can elevate the levels of enteric clostridial pathogens in the soil and the subsequent disease risk, as highlighted by case–control studies. The ability of Clostridia to sporulate results in their long‐term persistence post‐introduction, increasing the time period for disease transmission. Regularly or permanently saturated soils may also enhance survival, or potentially facilitate the regrowth of some indigenous or introduced Clostridia. This is supported by the high prevalence of Clostridia in paddy soils, greater detection of pathogens in flooded soils, and the higher onset of some clostridial diseases in regions with poorly drained soils. Future research should elucidate soil types and environmental conditions which can enhance pathogen survival/regrowth. The adoption of molecular and sequencing technologies for future diagnostics can facilitate more sensitive detection and a higher resolution of pathogen typing, allowing a better understanding of pathogen population dynamics in farm soils and disease epidemiology. Highlights Understanding the behaviour of soil‐borne clostridial pathogens is key for disease management. Soil, environmental and management factors affecting pathogen survival/introduction are discussed. Soil waterlogging and application of organic soil amendments may increase the number of soil pathogens. More pathogen surveillance and standardisation of diagnostics to better understand behaviour is needed.

show abstract

“…Its spore phase is considered highly resistant to environmental conditions, as well as conventional disinfection processes, whereby, [17] found that the inactivation rate of E.coli was one order of magnitude greater than that of C. perfringens. Therefore, it was suggested that rather than E. coli, this microorganism could be used to predict the presence of resistant protozoan and helminthic pathogens such as Cryptosporidium, Giardia and helminth eggs [18][19][20]; However, a comprehensive understanding of how these indicator organisms would respond to different pH, DO and temperature conditions is missing in the literature.…”

Section: Introductionmentioning

confidence: 99%

Significance of Algae in eliminating and deactivating pathological index Organisms in Wastewater Stabilization Pond Systems

Al-Tameemi

Kadhim

2019

E3S Web Conf.

View full text Add to dashboard Cite

Wastewater stabilization ponds (WSPs) are an economical alternative to conventional wastewater treatment technologies. They are commonly favored by small and rural communities. Due to long hydraulic retention time required by the treatment in these systems, algal activity is often expected during summer season. This study investigated the effects of algal growth on the removal and inactivation of pathogenic indicator organisms in WSP systems. Two predominant algae species (Mougeotia sp. and Nostochopsis sp) that were found in Iraq (Alkhademiyah sewage station in Baghdad) WSP were able to increase both pH and DO. The highest inactivation rates of both E. coli and total coliforms (TC) were observed at pH 10.6 compared to other pH (5.1, 8.2, 8.4, 10.6) investigated in the bench-scale experiments. Both high (20mg/L) and low DO (1 mg/L) levels can facilitate the removal and inactivation of both E. coli and TC. Enterococci were significantly reduced at both intermediate (8.6 mg/L) and high (20 mg/L) DO concentrations. Therefore, the presence of algae can potentially promote the removal of E. coli, TC and Enterococci. Much higher inactivation of E. coli, TC and Enterococci at a higher temperature (20°C) than at a lower temperature (4°C) indicates temperature is one the most important removal factor. Two potential/additional indicator organisms (Enterococci and Clostridium perfringens (C. perfringens)) exhibited different inactivation trends than the traditional indicators (E. coli and TC) under the same pH and DO conditions. C. perfringens were tolerant to all the tested pH, DO and temperature conditions. Their resistance to environmental stresses may pose potential health risk. Hence, both Enterococci and C. perfringens could be potentially used as indictor organisms to predict the overall level of pathogens in treatedwastewater.

show abstract

Inactivation of Clostridium perfringens spores and vegetative cells by photolysis and TiO2 photocatalysis with H2O2

Cited by 40 publications

References 22 publications

Removal of microorganisms and their chemical metabolites from water using semiconductor photocatalysis

Removal of microorganisms and their chemical metabolites from water using semiconductor photocatalysis

A review of the abundance, behaviour and detection of clostridial pathogens in agricultural soils

Significance of Algae in eliminating and deactivating pathological index Organisms in Wastewater Stabilization Pond Systems

Contact Info

Product

Resources

About