Impacts of water organic load on chlorine dioxide disinfection efficacy

Ayyıldız, Önder; İleri, Burcu; Sanik, Serdar

doi:10.1016/j.jhazmat.2009.02.153

Cited by 43 publications

(16 citation statements)

References 20 publications

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“…coli cells were enumerated using a membrane filter procedure (Ayyildiz et al 2009). One or ten milliliter (diluted) samples were filtered directly using sterile 0.45 (mi membrane filters (Beihua, China) with a sanitized metal vacuum apparatus.…”

Section: Methodsmentioning

confidence: 99%

The synergistic effect of Escherichia coli inactivation by sequential disinfection with low level chlorine dioxide followed by free chlorine

Yang

Zhu

et al. 2012

Journal of Water and Health

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To the best of our knowledge, there was little information available on pathogen removal using low level disinfectant followed by free chlorine in sequential disinfection (SD). This study investigated Escherichia coli inactivation by four types of disinfection: single step disinfection (SSD), SD, traditional sequential disinfection (TSD) and mixed disinfectant disinfection (MDD). Results indicated that SD had higher ability to inactivate E. coli than the others, indicating there was a positive synergistic effect on chlorine disinfection by prior dosing with a low level of chlorine dioxide (ClO 2 ). The ONPG assay suggested that the permeability of cell wall rather than the viability of E. coli were changed under 0.02 mg/l ClO 2 treatment. The coexistence of residual ClO 2 and free chlorine also plays an active synergistic effect. Additionally, temperature had a positive effect on E. coli inactivation in SD, while inactivation was reduced in alkaline compared to neutral and acidic conditions.

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Section: Methodsmentioning

confidence: 99%

The synergistic effect of Escherichia coli inactivation by sequential disinfection with low level chlorine dioxide followed by free chlorine

Yang

Zhu

et al. 2012

Journal of Water and Health

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“…Liquid chlorine dioxide was collected in dark glass bottles, which were sealed and stored at 4°C. 24 ClO2 solution was prepared daily and its concentration was determined by DPD (the N,N-diethyl-p-phenylenediamine) method using a DR/2800 spectrophotometer (HACH, Co., Loveland, CO, USA).…”

Section: Chlorine Dioxidementioning

confidence: 99%

The Applications of ‘active packaging and chlorine dioxide’ for extended shelf life of fresh strawberries

Aday

Caner

2010

Packag Technol Sci

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Fresh strawberries are highly perishable because of their high respiration rates. Three alternative packaging approaches were investigated to maintain the high quality and to extend the shelf life of strawberries. These were active packaging using chlorine dioxide (ClO2) and ethylene-moisture sachets. The quality properties of four groups of samples were measured over 3 weeks at 4°C. The groups were: control, active packaging without ClO2 treatment, active packaging with low-dose (5 ppm) ClO2 treatment and active packaging with high-dose (10 ppm) ClO2 treatment. Measured properties were weight loss, gas concentration, pH, titratable acidity (TA), soluble solids content, texture profile and colour. Active packaging with low-dose (5 ppm) ClO2 treatment was found to be the most effective for TA retention and for maintaining (L) brightness values. The control group showed the largest total soluble solids reduction from 7.60 to 6.57. Active packaging without ClO2 treatment showed the lowest weight loss (0.33%), while the control group showed the highest (1.86%) at the end of the storage.Active packaging with high-dose ClO2 treatment showed the highest preference value in global appearance, colour and firmness properties. The low-and high-dose active packaging groups had greater firmness, gumminess and chewiness than that of all other treatments. The results from this study showed that active packaging treatment with ClO2 and the ethylene-moisture sachets had a beneficial effect on the quality of strawberries and could be used commercially.

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“…They are also designed to be used on pre-cleaned surfaces. While we did not perform experiments using additional simulated organic (soil) load, previous studies using oxidizing disinfectants including H 2 O 2 , ClO 2 or sodium hypochlorite against a variety of human norovirus surrogates (murine norovirus and FCV) have shown that organic load significantly reduces virucidal efficacy (Urakami et al, 2007; Ayyildiz et al, 2009; Morino et al, 2011). Despite the reasonable virucidal efficacy achieved by applying the 7.5% H 2 O 2 disinfectant by fogging, corrosivity concerns after long-term use remain (Rutala et al, 2008).…”

Section: Discussionmentioning

confidence: 99%

Virucidal Activity of Fogged Chlorine Dioxide- and Hydrogen Peroxide-Based Disinfectants against Human Norovirus and Its Surrogate, Feline Calicivirus, on Hard-to-Reach Surfaces

et al. 2017

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Human norovirus (NoV) is the leading cause of foodborne illnesses in the United States. Norovirus is shed in high numbers in the feces and vomitous of infected individuals. Contact surfaces contaminated with bodily fluids harboring infectious virus particles serve as vehicles for pathogen transmission. Environmental stability of NoV and its resistance to many conventional disinfectants necessitate effective inactivation strategies to control the spread of virus. We investigated the efficacy of two commercial disinfectants, hydrogen peroxide (7.5%) and a chlorine dioxide (0.2%)-surfactant-based product using a fogging delivery system against human NoV GI.6 and GII.4 Sydney strains as well as the cultivable surrogate, feline calicivirus (FCV) dried on stainless steel coupons. Log10 reductions in human NoV and FCV were calculated utilizing RNase RT-qPCR and infectivity (plaque) assay, respectively. An improved antiviral activity of hydrogen peroxide as a function of disinfectant formulation concentration in the atmosphere was observed against both GII.4 and FCV. At 12.4 ml/m3, hydrogen peroxide achieved a respective 2.5 ± 0.1 and 2.7 ± 0.3 log10 reduction in GI.6 and GII.4 NoV genome copies, and a 4.3 ± 0.1 log10 reduction in infectious FCV within 5 min. At the same disinfectant formulation concentration, chlorine dioxide-surfactant-based product resulted in a respective 1.7 ± 0.2, 0.6 ± 0.0, and 2.4 ± 0.2 log10 reduction in GI.6, GII.4, and FCV within 10 min; however, increasing the disinfectant formulation concentration to 15.9 ml/m3 negatively impacted its efficacy. Fogging uniformly delivered the disinfectants throughout the room, and effectively decontaminated viruses on hard-to-reach surfaces. Hydrogen peroxide delivered by fog showed promising virucidal activity against FCV by meeting the United States EPA 4-log10 reduction criteria for an anti-noroviral disinfectant; however, fogged chlorine dioxide-surfactant-based product did not achieve a 4-log10 inactivation. Future investigation aimed at optimizing decontamination practices is warranted.

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Impacts of water organic load on chlorine dioxide disinfection efficacy

Cited by 43 publications

References 20 publications

The synergistic effect of Escherichia coli inactivation by sequential disinfection with low level chlorine dioxide followed by free chlorine

The synergistic effect of Escherichia coli inactivation by sequential disinfection with low level chlorine dioxide followed by free chlorine

The Applications of ‘active packaging and chlorine dioxide’ for extended shelf life of fresh strawberries

Virucidal Activity of Fogged Chlorine Dioxide- and Hydrogen Peroxide-Based Disinfectants against Human Norovirus and Its Surrogate, Feline Calicivirus, on Hard-to-Reach Surfaces

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