Chlorine Dioxide Monitoring Articles

  • 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 - ...


    By Raschig USA Inc.

  • 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 ...


    By IWA Publishing

  • Chlorine Dioxide gas detection: A comprehensive guide

    Introduction Some years agoago, the bleaching process in the paper industry was changed from using Chlorine (Cl2) as bleaching agent to Chlorine dioxide (ClO2). This was a challenge forThis posed a major challenge to industrial hygienists, as there were no sensors or detectors available that were specific to Chlorine dioxide: There was no sensor technology for gas detectors available that ...

  • Leaching of bisphenol A and F from new and old epoxy coatings: laboratory and field studies

    Laboratory tests were carried out with three types of new epoxy resins to assess the release of bisphenol A and F (BPA and BPF) and potential halogenated phenolic by-products. Tests were carried out over a duration of 6 months in the presence and absence of disinfectants (chlorine and chlorine dioxide) at realistic doses and contact times. None of the three systems exhibited Fickian-type ...


    By IWA Publishing

  • 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 ...


    By IWA Publishing

  • In-line ASTM- and hazen-color measurement in refineries and chemical industry

    In many production processes of the chemical, petrochemical and pharmaceutical industry, color is an important parameter for the quality of the product or the production process. Might be the exact color value, might be the requirement of an ideally colorless product, might be the color range in a specific production step of a product. Examples are decoloration processes as in phthalic anhydride, ...


    By Sigrist-Photometer AG

  • Chloramines

    OVERVIEW When chlorine is added to a water supply containing certain organics, the formation of halogenated organics occurs. Called 'trihalogenated methanes' (THM's) these reaction products are suspected carcinogens and maximum allowable limits in municipal supplies are imposed by the U.S. Environmental Protection Agency (EPA). To reduce the potential for the formation of THM's, many U.S. ...

  • 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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