Solar water disinfection (SODIS): A review from bench-top to roof-top

McGuigan, Kevin G.; Conroy, Ronán; Mosler, Hans‐Joachim; Preez, Martella du; Ubomba-Jaswa, Eunice; Fernández‐Ibáñez, Pilar

doi:10.1016/j.jhazmat.2012.07.053

Cited by 454 publications

(364 citation statements)

References 142 publications

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“…The majority of the studies revealed that pH 2.8 is the optimum pH for important waterborne pathogens and especially those associated with diarrhoeal diseases such as dysentery, salmonella, cholera, gastro-enteritis, hepatitis A, etc. [7]. Outside of the solar simulation laboratory, human studies conducted in cooperation with rural communities in Sub-Saharan Africa have shown that children who use SODIS-treated water have lower rates of diarrhoeal disease with incidence of dysentery observed to reduce by between 25%-50%.…”

Section: Solar Technologies In Urban Wastewater Treatment and Reusementioning

confidence: 99%

Can solar water-treatment really help in the fight against water shortages?

Fernández‐Ibáñez¹,

McGuigan²,

Fatta‐Kassinos³

2017

Europhysics News

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In the face of increasing global population, rising industrialization and the inescapable reality of climate change, the demand for access to clean, safe water has never been greater. Solar wastewater remediation technologies and solar water-treatment have the potential to contribute significantly towards affordable and sustainable solutions to this seemingly intractable problem. They do this by using solar energy to treat water from sources that previously would have been considered unsuitable for further use. In this article we reveal the basic principles surrounding the design and application of solar remediation reactors for urban wastewater treatment and reuse and then show how even simpler technologies are being used in low-income communities to provide affordable and safe potable water.

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Section: Solar Technologies In Urban Wastewater Treatment and Reusementioning

confidence: 99%

Can solar water-treatment really help in the fight against water shortages?

Fernández‐Ibáñez¹,

McGuigan²,

Fatta‐Kassinos³

2017

Europhysics News

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“…A number of studies have therefore investigated bacterial photoinactivation in the context of environmental water quality (1)(2)(3)(4)(5)(6)(7), with further studies also focusing on photoinactivation in drinking water treatment (8)(9)(10)(11), photodynamic therapy (12)(13)(14)(15), and wastewater treatment (16)(17)(18)(19)(20). Bacteria can be inactivated by sunlight by direct and indirect mechanisms.…”

mentioning

confidence: 99%

“…The majority of previous work on bacterial photoinactivation mechanisms in aquatic environments has focused on fecal indicator bacteria (FIB), such as enterococci, fecal coliforms, and Escherichia coli (2,5,6,11,19,(22)(23)(24), which are the basis of recreational and drinking water quality monitoring criteria (25) and have served as process indicators for decades. Fewer studies have investigated photoinactivation mechanisms of bacterial pathogens in aquatic environments (13,(26)(27)(28).…”

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confidence: 99%

Staphylococcus aureus Strain Newman Photoinactivation and Cellular Response to Sunlight Exposure

McClary

Sassoubre

Boehm

2017

Appl Environ Microbiol

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Sunlight influences microbial water quality of surface waters. Previous studies have investigated photoinactivation mechanisms and cellular photostress responses of fecal indicator bacteria (FIB), including Escherichia coli and enterococci, but further work is needed to characterize photostress responses of bacterial pathogens. Here we investigate the photoinactivation of Staphylococcus aureus (strain Newman), a pigmented, waterborne pathogen of emerging concern. We measured photodecay using standard culture-based assays and cellular membrane integrity and investigated photostress response by measuring the relative number of mRNA transcripts of select oxidative stress, DNA repair, and metabolism genes. Photoinactivation experiments were performed in both oxic and anoxic systems to further investigate the role of oxygen-mediated and non-oxygen-mediated photoinactivation mechanisms. S. aureus lost culturability much faster in oxic systems than in anoxic systems, indicating an important role for oxygen in photodecay mechanisms. S. aureus cell membranes were damaged by sunlight exposure in anoxic systems but not in oxic systems, as measured by cell membrane permeability to propidium iodide. After sunlight exposure, S. aureus increased expression of a gene coding for methionine sulfoxide reductase after 12 h of sunlight exposure in the oxic system and after 6 h of sunlight exposure in the anoxic system, suggesting that methionine sulfoxide reductase is an important enzyme for defense against both oxygen-dependent and oxygen-independent photostresses. This research highlights the importance of oxygen in bacterial photoinactivation in environmentally relevant systems and the complexity of the bacterial photostress response with respect to cell structure and transcriptional regulation.IMPORTANCE Staphylococcus aureus is a pathogenic bacterium that causes gastrointestinal, respiratory, and skin infections. In severe cases, S. aureus infection can lead to life-threatening diseases, including pneumonia and sepsis. Cases of communityacquired S. aureus infection have been increasing in recent years, pointing to the importance of considering S. aureus transmission pathways outside the hospital environment. Associations have been observed between recreational water contact and staphylococcal skin infections, suggesting that recreational waters may be an important environmental transmission pathway for S. aureus. However, prediction of human health risk in recreational waters is hindered by incomplete knowledge of pathogen sources, fate, and transport in this environment. This study is an in-depth investigation of the inactivation of a representative strain of S. aureus by sunlight exposure, one of the most important factors controlling the fate of microbial contaminants in clear waters, which will improve our ability to predict water quality changes and human health risk in recreational waters.KEYWORDS Staphylococcus aureus, coastal waters, enterococci, fecal indicator bacteria, photoinactivation

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“…However, the coincidence of ample solar supplies in these areas favored studies on solar purification of drinking water sources [3][4][5]. A fair share of SODIS works, reviewed by McGuigan et al [6] have demonstrated the ability of UVA and UVB wavelengths of the solar spectrum to inactivate a vast number of microorganisms, such as Escherichia coli, Salmonella, Shigella Flexneri, Fusarium and more [7][8][9][10]. Slowly, the interest has moved to wastewater treatment, and photolytic and photocatalytic methods have been used to target the present microorganisms [11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%