hydrogen cyanide Articles

  • Limitations of the removal of cyanide from coking wastewater by ozonation and by the hydrogen peroxide-ozone process

    The purpose of this study is to compare the efficiency of ozonation and the hydrogen peroxide–ozone process for the removal of cyanide from coking wastewater. The most efficient oxidation process is combined with coagulation–flocculation–decantation and lime–soda ash softening pretreatments. The oxidation in aqueous solution and industrial wastewater (at pH 9.5–12.3) by O3 was carried out ...


    By IWA Publishing

  • Factors Affecting Cyanide Generation in Chlorinated Wastewater Effluent Matrix

    ABSTRACTFalse positives for cyanide analysis in wastewaters have been reported. We examined the effects of storage time at high pH and of pH adjustments on the cyanide levels. Cyanide levels changed within the holding time allowed by Standard Methods. We also studied the difference in cyanide levels using two disinfection conditions -- breakpoint chlorination and chloramination. Glycine was used ...

  • Simple and sensitive detection of cyanide using pinhole shell-isolated nanoparticleenhanced Raman spectroscopy

    Cyanide is a great threat to public health, environmental safety and homeland security because of its extremely high toxicity and widespread usage in industry. Countering such a threat can be greatly aided by a rapid, sensitive, on-site detection method. Here, a pinhole shell-isolated nanoparticle-enhanced Raman spectroscopy (SHINERS) technique for cyanide sensing has been established, and a ...


    By B&W Tek

  • Corrosion and fouling control in process equipment

    Effective chemical treatment programmes can help to prevent plant damage and financial losses arising from corrosion and fouling. Corrosion attack is an omnipresent threat in oil refineries and petrochemical plants. It may lead to loss of production, cost of maintenance and repairs, replacement cost for equipment, safety aspects and potential environmental impact. If corrosion is ...


    By Kurita

  • Electroplating Industry - Pollution Prevention Guidelines

    Introduction Pollution Prevention Guidelines to provide technical advice and guidance to staff and consultants involved in pollution-related projects. The guidelines represent state-of-the-art thinking on how to reduce pollution emissions from the production process. In many cases, the guidelines provide numerical targets for reducing pollution, as well as maximum ...


    By The World Bank

  • The Greening of Carbon Fibre

    Carbon fiber is a material that has, and will continue to revolutionize the products we use every day by making them stronger, lighter and more durable.  Experts estimate that the specialty material is twice as stiff as steel and five times stronger, per unit of weight.   It is made from organic polymers which consist of long strings of molecules held together by carbon atoms.  The ...

  • Carbon Fiber Emission Control Strategies

    Problem Carbon fiber (fibre) and graphite reinforced polymers are materials that have, and will continue to revolutionize the products we use everyday by making them stronger, lighter and more durable. However, the manufacturing process can have serious environmental ramifications and immediate danger to human health if careful consideration is not given to emission control at the ...

  • Case study - Carbon fiber: Oven emission control strategies

    OVERVIEW Carbon fiber (fibre) and graphite reinforced polymers are materials that have, and will continue to revolutionize the products we use everyday by making them stronger, lighter and more durable. However, the manufacturing process can have serious environmental ramifications and immediate danger to human health if careful consideration is not given to emission control at the ...

  • Solution blooming for fracking spills?

    Blooming salts may clean up after brine spills North Dakota's oil boom can have a salty side-effect. Wastewater from oil drilling and hydraulic fracturing – or fracking – is often laden with salts and can spill, contaminating soils. In 2014, for example, 42 such brine spills per week, on average, were recorded in North Dakota. Brine spills introduce so ...


    By American Society of Agronomy

  • Coke Manufacturing Industry - Pollution Prevention Guidelines

    Introduction Pollution Prevention Guidelines to provide technical advice and guidance to staff and consultants involved in pollution-related projects. The guidelines represent state-of-the-art thinking on how to reduce pollution emissions from the production process. In many cases, the guidelines provide numerical targets for reducing pollution, as well as maximum ...


    By The World Bank

  • Case study - Carbon fibre: furnace & oven emission control

    Overview A carbon fiber company in China was faced with the challenge of selecting an emission control system for a new pilot line at their specialty fiber products facility. The line would include furnaces and three ovens, both of which would emit Carbon Monoxide (CO), Ammonia (NH3) and lethal amounts of Hydrogen Cyanide (HCN).   Action ...

  • Chemical Storage Practices

    ScienceLab offers a full line of Chemical Storage Practices, Laboratory Equipment and Chemicals for any application from clinical to research. We also carry a wide range Educational Products, pH meters, microscopes, thermometers and digital scales. Look around you in the laboratory. Take note of the system used to store the chemicals and the conditions and environment they are stored in. More ...


    By US Chemical Storage

  • Chemicals used for pH Adjustment

    The most commonly used neutralization chemicals for acid or base neutralization are 98% Sulfuric acid and 50% Sodium hydroxide. In many cases these are very good choices, however, there are many considerations when selecting chemicals and these may not always be the best selection. The selection of the chemicals used for the neutralization of an acid or base is almost as important as the design ...


    By Digital Analysis Corp.

  • Protecting America with Specialty Gases

      Prior to 9/11, environmental concerns largely focused on monitoring, controlling and reducing the pollution the industrial revolution had set in motion. From a specialty gas point of view, our efforts at Scott ...

  • Steps toward DHS chemical facility anti-terrorism standard compliance

    Department of Homeland Security (DHS) released the final DHS Chemicals of Interest Appendix A to the Chemical Facility Anti-Terrorism standards. Whereas Appendix A was released on Nov. 2, it did not go into effect until it was published in the Federal Register on November 20, 2007 (FR# 223). This means the 60-day deadline to complete DHS's 'Top Screen' did not begin until this FR publication ...

  • Water pollution · Canarina DESCAR software

    Natural waters contain micro-organism as well as solutes. There is a distinction between ‘pure’ water, meaning water that is fit to drink and pure water that is a single substance. A water pollutant is a substance that prevents the use of water for a specified purpose. The signs of polluted water are obvious. Poor drinking water tastes and smell bad. ...

  • Iron and Steel Manufacturing Industry - Pollution Prevention Guidelines

    Introduction Pollution Prevention Guidelines to provide technical advice and guidance to staff and consultants involved in pollution-related projects. The guidelines represent state-of-the-art thinking on how to reduce pollution emissions from the production process. In many cases, the guidelines provide numerical targets for reducing pollution, as well as maximum ...


    By The World Bank

  • A Guide to Gas Detector Tubes. Your Questions Answered

    Gas detector tubes are easy to use, are low cost, and the method is intrinsically safe, allowing it to be deployed in all industries. Because detector tubes don’t require calibration, users see the benefits of this technology over electronic gas detectors due to their ease of ...


    By a1-cbiss

  • Wastewater-Primary Treatment

    Primary Treatment is defined as a wastewater treatment process that takes place in a rectangular or circular tank and allows those substances in wastewater that readily settle or float to be separated from the water being treated. This process achieves solids separation. The solids readily available to settle to achieve sedimentation will do so in a settling tank referred as a clarifier. On the ...

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