Efficacy of Chlorine Dioxide as a Disinfectant for Bacillus Spores in Drinking-Water Biofilms

Hosni, Ahmed A.; Szabo, Jeffrey G.; Bishop, Paul L.

doi:10.1061/(asce)ee.1943-7870.0000355

Cited by 18 publications

(8 citation statements)

References 17 publications

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“…Morrow et al (2008) studied the association and decontamination of B. anthracis spores on biofilm-conditioned pipe material surfaces in a simulated drinking water system. Hosni et al (2011) used chlorine dioxide as a disinfectant for decontamination of Bacillus spores in drinking-water biofilms using the spores of the B. anthracis surrogate, B. globigii.…”

Section: Introductionmentioning

confidence: 99%

Inhibitory effects of single-walled carbon nanotubes on biofilm formation fromBacillus anthracisspores

Dong

Yang

2014

Biofouling

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This study reports the inhibitory effect of single walled carbon nanotubes (SWCNTs) on biofilm formation from Bacillus anthracis spores. Although the presence of 50 to 100 μg ml(-1) of SWCNTs in the suspension increased spore attachment in the wells of 96-well plates, the presence of 200 μg ml(-1) of SWCNTs in the germination solution decreased the germination percentage of the attached spores by 93.14%, completely inhibiting subsequent biofilm formation. The inhibition kinetics of 50 μg ml(-1) SWCNTs on biofilm formation showed that this concentration inhibited biofilm formation by 81.2% after incubation for 48 h. SWCNT treatment in the earlier stages of biofilm formation was more effective compared to treatment at later stages. Mature biofilms were highly resistant to SWCNT treatment.

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Section: Introductionmentioning

confidence: 99%

Inhibitory effects of single-walled carbon nanotubes on biofilm formation fromBacillus anthracisspores

Dong

Yang

2014

Biofouling

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“…The process of using ClO 2 for preparing oxidized starch will not cause secondary pollution to the environment [14]. Supposing the oxidation capacity of chlorine is 100%, the oxidation capacities of several oxidants are listed as follows [15]: Due to its outstanding oxidizability, ClO 2 has been widely used in water treatment [16][17][18], food preservation [19], clinical medical disinfection [20], and so forth. It is known that the oxidization of starch using ClO 2 as oxidant has got little research consideration so far.…”

Section: Introductionmentioning

confidence: 99%

Preparation of Oxidized Starch Using Environment Friendly Chlorine Dioxide as Oxidant

Guo

Huang

Zhang

et al. 2014

International Journal of Food Engineering

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In the present work, the oxidized corn starch was prepared by using chlorine dioxide as novel oxidant. It was characterized by X-ray diffraction, scanning electron microscope (SEM), and transmission electron microscope (TEM). The main factors that affect the oxidation process were studied, and the oxidation degree of oxidized starch was determined by the carboxyl content and viscosity of the product. The results show that carboxyl groups are introduced into the starch chains successfully, and the oxidation reaction mainly carries out at the amorphous area. Compared with native starch, the light transmittance and anti-retrogradation of oxidized starch increase, whereas the viscosity reduces. The best oxidized starch can be obtained at the sodium chlorate dosage of 3%, hydrochloric acid 4%, and sulfuric acid 3% (all based on the initial starch weight), while the oxidation reaction is conducted at 50°C for 5 h.

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“…Using ethanol for both processing and storage of Bacillus spores is considered safe regarding the survivability of spore-forming bacteria. Bacillus spores are resistant to ethanol (Sneath et al 1986;Russell 1990) and it is common practice to store Bacillus spores in 40% ethanol at 5 • C (Szabo et al 2007;Hosni et al 2011). The spores would start to germinate in the presence of water/aqueous solutions; however, in the absence of nutrients, the fresh vegetative cells would die (Driks 2003).…”

Section: Methodsmentioning

confidence: 99%

Aerosolization of Bacterial Spores with Pressurized Metered Dose Inhalers

Kesavan

Schepers

Bottiger

et al. 2013

Aerosol Science and Technology

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Bioaerosol detection and identification systems need to be periodically checked for assurance that they are responsive to aerosol challenges. Herein, pressurized metered dose inhalers (pMDIs) containing ethanol suspensions of two simulants for B. anthracis spores are considered for providing suitable aerosols. Doses and shot weights from pMDIs with canisters having volumes equal to that of 200 metering-valve actuations were constant for ≤165 actuations, but drop beyond that range. There were statistically significant dose variations between replicate pMDIs and between two types of actuators used on the pMDIs. The storage halflives of pMDIs filled with Bacillus atrophaeus (BG) and Bacillus thuringiensis subsp. israelensis (Bti) spore formulations are predicted to be 32 and 136 months, respectively, if the canisters are stored under refrigeration (4 • C). The prediction is based on use of a logarithmic regression model relating CFU per actuation to storage time, with data taken at times of 1-12 months. Demonstration of the utility of the concept was provided by producing responses from a polymerase chain reaction (PCR) identifier with pMDI-generated BG and Bti aerosols that were collected with a 100 L/min wetted wall bioaerosol sampling cyclone.

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Efficacy of Chlorine Dioxide as a Disinfectant for Bacillus Spores in Drinking-Water Biofilms

Cited by 18 publications

References 17 publications

Inhibitory effects of single-walled carbon nanotubes on biofilm formation fromBacillus anthracisspores

Inhibitory effects of single-walled carbon nanotubes on biofilm formation fromBacillus anthracisspores

Preparation of Oxidized Starch Using Environment Friendly Chlorine Dioxide as Oxidant

Aerosolization of Bacterial Spores with Pressurized Metered Dose Inhalers

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