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The Role of Water Solubility and Diffusion Coefficient in Air of Chlorine Dioxide Gas during Surface Decontamination and Compatibility of Selected Plastics and Elastomers
The Role of Water Solubility and Diffusion Coefficient in Air of Chlorine Dioxide Gas during Surface Decontamination and Compatibility of Selected Plastics and Elastomers
****!!!!****!!!!**** {Includes data table of studies of gas and liquid against specific pathogens on food} "ClO2 disinfects by oxidation through the one-electron transfer mechanism, resulting in a reduction to ClO2–...The inactivation may be reached by allowing permeability of the cell membrane by changing the configuration of lipids and protein which involve the oxidation of amino acids by the gas. The second option is due to the reaction with nucleic acid and/or protein structures... However, some research showed degradation in viral RNA, inducing genotoxicity or discontinuing replication of genome information." "At higher relative humidity, a greater reduction of pathogen population was reported. This might be explained due to the increment of the pores’ sizes in the bacteria due to swelling at high humidity, which allow penetration of the ClO2 molecule into the bacteria." "Gaseous ClO2 showed a negative impact on treated fruits and vegetables through enzymatic browning formation... is related to the deterioration of nutritional quality. However, additional treatments can be added to the gas exposure to inhibit browning..." "negative color change in spinach leaves, which occurred during storage after being exposed even to 50 ppm of gaseous ClO2. Also, treatments with higher concentrations may lead to bleaching of fruits and vegetables" "reaction rate was estimated to be... which is significantly higher than the reaction rate reported by previous researchers ... the chamber used here was stainless steel... likely increased the reaction with the walls, and created minor corrosion" "larger exposure surface area for the water in contact with the gas increased the overall decay rate" "some crevices in equipment could impact the effectiveness of the ClO2 gas treatment due to the time for gas to diffuse into the crevice" "the ClO2 gas concentration is surface area- and water volume-dependent" "Results showed an increase in the reaction rate due to water presence at different water volume and exposure surface area. After 7 days’ exposure at 3000 ppm of ClO2 gas, none of the selected plastics or elastomers showed a significance difference (p0.05) in the hardness value." "excitation wavelengths of ClO2 are near the ultraviolet and visible light... leads to dissociation into ClO + O or Cl + O2" " Further research can also be extended to determine the rate of ClO2 molecules dissolving into water, and the residuals form."
·trace.tennessee.edu·
The Role of Water Solubility and Diffusion Coefficient in Air of Chlorine Dioxide Gas during Surface Decontamination and Compatibility of Selected Plastics and Elastomers
chlorine dioxide reagent used in water treatment
chlorine dioxide reagent used in water treatment
****!!!!****!!!!**** " In practice, based on a 10% chlorine excess compared with the stoichiometry and a 95% efficiency, 1.41 g of pure sodium chlorite and 0.61 g of chlorine will be required to produce 1 g of CℓO2." "obtained by oxidizing a solution of sodium chlorite using chlorine or hydrochloric acid" "Sodium chlorite solutions can be prepared from sodium chlorite powder. Water that has first been softened will need to be used to prevent calcium carbonate from precipitating."
·suezwaterhandbook.com·
chlorine dioxide reagent used in water treatment
US EPA, Pesticide Product Label, SELECTROCIDE 5G ~EPA
US EPA, Pesticide Product Label, SELECTROCIDE 5G ~EPA
****!!!!****!!!! {Materials suitable for Chlorine Dioxide containers} "Construction should be of dark or opaque/UV-blocking (preferred) oxidation-resistant plastic or glass. Some materials recommended include: -High Density Polyethylene (HDPE)- Polypropylene (PP)- Polyethylene Terephthalate (PET) (PETE)- Polyvinyl Chloride (PVC)- Polycarbonate (PC)- Glass (UV-blocking preferred)- Gasket materials; silicone, viton or EPDM" "DECORATIVE AND ORNAMENTAL FOUNTAINS 5 ppm residual chlorine dioxide level. Circulate water in normal operation of the system.... Repeat daily until desired results are achieved." "Selective Micro® Chlorine Dioxide Test Strips"
·www3.epa.gov·
US EPA, Pesticide Product Label, SELECTROCIDE 5G ~EPA
Compatibility of Material and Electronic Equipment with Hydrogen Peroxide and Chlorine Dioxide Fumigation | Science Inventory | US EPA
Compatibility of Material and Electronic Equipment with Hydrogen Peroxide and Chlorine Dioxide Fumigation | Science Inventory | US EPA
{ Fumigation against Bacillus anthracis} "Results from the 750 ppmv ClO2 fumigation suggest that 750 ppmv was more damaging to Category 4 materials than the 3000 ppmv ClO2 fumigation. Although both fumigation concentrations resulted in severe physical damage to the computers by promoting rusting and corrosion, only the computers exposed to 750 ppmv ClO2 experienced unrecoverable failures. It is not readily understood why the lower concentration (same RH) fumigation was more damaging; however, the same sample size and difference in computer batches cannot be ruled out as confounding parameters." "fumigation with ClO2 produced large amounts of dust inside the computers... an acrid smell (attributed to hydrogen chloride)... Vacuuming of the visible dust not only served to remove the majority of this probable health hazard and prevent the dust from being spread... also may have assisted in keeping all computers almost fully operational after an entire calendar year. "
·cfpub.epa.gov·
Compatibility of Material and Electronic Equipment with Hydrogen Peroxide and Chlorine Dioxide Fumigation | Science Inventory | US EPA