chlorine dioxide Articles
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Modelling approach to quickly assess polyethylene ageing by chlorine dioxide in distribution systems
A prediction model for the life of polyethylene (PE) has been developed as a function of chlorine dioxide concentration and pressure. It can be coupled with an existing hydraulic model covering chlorine dioxide residuals and pressure values in the network. It allows a quick identification of the areas of highest PE failure risk. The methodology is applied successfully to a real distribution ...
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Using RuO2 anode for chlorine dioxide production in an un-divided electrochemical cell
Chlorine dioxide is a well known powerful disinfectant. Although there are several chemical and electrochemical methods developed for on-line chlorine dioxide generation, the details are mostly confined as patents. We studied in this work the electrochemical generation of dissolved chlorine dioxide from an un-buffered solution of sodium chlorite and sodium chloride mixture in an un-divided ...
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Chlorine Dioxide – dispelling the myths
The internet is an incredibly useful research tool. It allows us to source and share information instantaneously. Unfortunately, this means that myths and misconceptions can spread very quickly and obscure the truth. In this post, we aim to tackle some of the myths that surround chlorine dioxide, and how this differs from our chlorine dioxide based product CleanOxide. Myth 1: Pure chlorine ...
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4 reasons chlorine dioxide should be your preferred sanitiser
To the lay-person, a commercial kitchen is just a floor and some equipment that needs a good clean regularly. They don’t understand the dangers of bacterial contamination and how easy it is for food to be affected. Most commercial kitchens will use bleach, or a similar sanitiser, to keep their space safe. Today, we will share with you the top five reasons you should be using chlorine ...
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Monochloramine and chlorine dioxide for controlling
Legionella pneumophila contamination: biocide levels and disinfection by-product formation in hospital water networksLegionella colonization in hospital hot water distribution networks was evaluated following 36 months of continuous treatment with monochloramine and compared with chlorine dioxide. Nitrite, nitrate, chlorite, chlorate, bromide, trihalomethanes and haloacetic acids as well as the biocide concentration at sampled points were measured. Only 8/84 samples treated with monochloramine were found ...
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Simultaneous reduction of by-products of chlorine dioxide and chlorine using Fe(II)–Al(III) coagulant mixture
Ferrous iron has been considered very useful for removal of chlorite, a by-product of chlorine dioxide. However, a serious problem can occur associated with high residual iron concentrations in water after Fe(II) treatment, especially at weak acidic condition (pH 6), having a higher capacity of chlorite reduction. Simultaneous removal of chlorite, dissolved iron, and humic acids was achieved with ...
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Accidental Releases Analysis for Toxic Aqueous Solutions
As a result of the cluster rule for the control of the hazardous air pollutants, pulp and paper mills are in the process of further substituting chlorine with aqueous chlorine dioxide for their bleaching operations. In addition, ammonia aqueous solutions are applied by paper mills in various processes. An evaporation model including both heat and mass transfer for aqueous solutions has been ...
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Change in genotoxicity of wastewater during chlorine dioxide and chlorine disinfections and the influence of ammonia nitrogen
The effects of chlorine dioxide and chlorine disinfections on the genotoxicity of different biologically treated sewage wastewater samples were studied by umu-test. The experiment results showed that when chlorine dioxide dosage was increased from 0 to 30 mg/L, the genotoxicity of wastewater first decreased rapidly and then tended to be stable, while when the chlorine dosage was increased from 0 ...
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Accidental releases analysis for toxic aqueous solutions
Abstract As a result of the cluster rule for the control of the hazardous air pollutants, pulp and paper mills are in the process of further substituting chlorine with aqueous chlorine dioxide for their bleaching operations. In addition, ammonia aqueous solutions are applied by paper mills in various processes. An evaporation model including both heat and mass transfer for aqueous solutions has ...
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Oxidative transformation of oxcarbazepine by Cl2, ClO2 and O3: characteristics and pathways
In this research, the degradation efficiency, mechanism and intermediates’ toxicities of oxcarbazepine (OXC) upon chlorination, chlorine dioxide oxidation and ozonation were investigated. Results showed that three degradation approaches followed second-order kinetics, and ozonation had the highest removal efficiency both of OXC and dissolved organic carbon (DOC). Reaction intermediates were ...
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Case study - Elemental chlorine free kraft pulp bleaching and chlorine dioxide scrubbing
Chlorine Dioxide - CIO2 Scrubber Packing at Kraft Pulp Mills Elemental Chlorine Free - ECF - bleaching of wood pulp using Chlorine Dioxide, CIO2, as the primary bleaching agent eliminates dioxin emissions. This is a reflection of the fact that as a bleaching agent CIO2 is 10 times more reactive than elemental Chlorine, Ck. As a powerful oxidizing agent CIO2 must be generated on site - it is too ...
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Biocidal Products Regulation - White Paper
The European Biocidal Products Regulation (Regulation (EU) No. 528/2012) stipulates that biocidal products may only be made available and used on the market if they are certified in accordance with this regulation. Unlike the previous biocidal products legislation, so-called “in-situ” procedures such as electrolysis, chlorine dioxide and ozone now also fall under this certification ...
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Chlorine dioxide disinfectant benefits
What is chlorine dioxide? Chlorine dioxide (ClO2) is a highly effective, eco-friendly micro biocide that carries the US EPA, FDA and UK Government approvals for many of its uses. It is a selective oxidant that eliminates many pathogenic organisms including Legionella, Listeria, Salmonella, amoeba cysts, Giardia cysts, E. Coli, and Cryptosporidium. Importantly, CIO2 also destroys biofilms so ...
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Virginia Water Treatment Plant Remains in Compliance and Improves Safety After Foreign Supplier Abruptly Ends Service - Case Study
Plant Converts to EPA-Approved Sodium Chlorite solution to Generate Chlorine Dioxide for Treatment of 2 to 3 MGD Situation This Mid-Atlantic water plant’s treatment system used gaseous chlorine and dry sodium chlorite to form chlorine dioxide. Chlorine dioxide is fed to the raw water and used to reduce TOC, iron and manganese, TTHM and HHA5 at this facility. Due to the storage and ...
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Comparison of commercial analytical techniques for measuring chlorine dioxide in urban desalinated drinking water
Most drinking water industries are closely examining options to maintain a certain level of disinfectant residual through the entire distribution system. Chlorine dioxide is one of the promising disinfectants that is usually used as a secondary disinfectant, whereas the selection of the proper monitoring analytical technique to ensure disinfection and regulatory compliance has been debated ...
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Bushfire and water quality
Bushfires pose a great risk to drinking water quality in water tanks, water catchment facilities and water supply infrastructure. Generation of large amounts of smoke, ash and debris leads to contamination of water in water tanks and on roof catchment infrastructure like gutters. In extreme cases, it is possible that fire retardants or foams used to control the fire may also be deposited on roof ...
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Catalytic oxidation and spectroscopic analysis of simulated wastewater containing acid chrome blue K by using chlorine dioxide as oxidant
An activated carbon-MnO2 catalyst was prepared by the dipping-calcination method using activated carbon as catalyst support. The catalyst was used for the catalytic oxidation of simulated acid chrome blue K wastewater. The COD removal efficiency and decolor efficiency by catalytic oxidation are 72.0% and 87.8%, respectively, at the condition of wastewater's COD is 2,418 mg/L, the optimum pH value ...
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Modeling and analysis of chlorine dioxide, chlorite, and chlorate propagation in a drinking water distribution system
The drinking water distribution system of Cremona, in the north of Italy, was monitored for 6 years (2006–2011) analyzing chlorine dioxide, chlorite, and chlorate concentrations. The software Epanet 2.0 (USEPA) was applied to the distribution system. The mixing zone of the water coming from the two drinking water treatment plants, respectively located to the west and east of the city, was ...
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Chlorine Dioxide Gas Decontamination of Exhaust HEPA Filter Units
Abstract The Mini Chlorine Dioxide System (MCS) utilizing Chlorine Dioxide Gas (CD) is a more efficient and safer method of decontaminating Exhaust HEPA Filter Units. In the past, the Formaldehyde method was cumbersome , time consuming and frequently ineffective. With formaldehyde, a human suspect carcinogen, one would possibly have to build enclosures and/or use booster fans, as well as wait for ...
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What methods of disinfecting water are there?
The aim behind disinfecting water is to make it safe to drink. As the water experts, NW Solutions will look at some of the different methods to disinfect water and their advantages and disadvantages. To be considered for this list, the disinfectant must: Destroy all types of pathogens, regardless of volume, present in the water Not make the water toxic or render it unpalatable Function ...
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