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Toxic Chemicals Applications

  • Cyanide Treatment with Hydrogen Peroxide

    Cyanides are used in a number of chemical synthesis and metallurgical processes (as simple salts or cyanide complexes). As a class, cyanides are highly toxic and must be destroyed or removed from wastewaters prior to discharge. The most common method for treating free or simple cyanide is alkaline chlorination. However, chlorination of cyanide results in highly toxic intermediates (e.g., cyanogen chloride) and, if organic material is present, chlorinated VOC’s. These compounds, together with the residual chlorine, create additional environmental problems. Consequently, there is a growing need for alternative, non-chlorine methods for destroying cyanides. Peroxygen compounds such as hydrogen peroxide, peroxymonosulfuric acid (1), and persulfates (1) are effective alternatives to alkaline chlorination for destroying free and complexed cyanides. The choice of peroxygen system depends on the reaction time available, the desired products (cyanate, or CO2 and NH3), the types of cyanides being treated (free, weak acid dissociable, or inert), and the system economics. Treatment with Hydrogen Peroxide While hydrogen peroxide will oxidize free cyanide, it is common to catalyze the reaction with a transition metal such as soluble copper, vanadium, tungsten or silver in concentrations of 5 to 50 mg/L (2).

    By USP Technologies based in Atlanta, GEORGIA (US) (USA).

  • Integrated real-time gas analysis solution for chemical weapon agents

    The nation has stockpiled thousands of cylinders and canisters of toxic and deadly chemical weapon agents, including mustard gas (HD), sarin (GB), tabun (GA), and V-agents. Most of these CWAs are stored at DOD facilities around the country and many have been in storage for years and years. As a consequence, DOD requirements specify that the stockpiles have to be monitored regularly for leakages to prevent release to the environment and exposure to personnel.

    By CIC Photonics, Inc. based in Albuquerque, NEW MEXICO (USA).

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    Waste water

    Physico-chemical parameters alone are not sufficient in obtaining reliable information on treated wastewater. Online toxicity monitoring must be performed in combination with routine chemical analysis. The assessment of biological effects of wastewater discharges in the ecosystems is today considered relevant and ecotoxicological tests identifying the ecological hazard are useful tools for the identification of environmental impacts.

    By microLAN B.V. based in Waalwijk, NETHERLANDS.

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    PTR-MS systems for security and safety purpose

    Illicit substances real-time detection with IONICON PTR-MS. PTR-MS combines all features that are needed for analyzing dangerous and illicit substances like explosives, chemical warfare agents (CWA), toxic industrial chemicals (TIC) and drugs.

    By Ionicon Analytik Ges.m.b.H. based in Innsbruck, AUSTRIA.

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    Precision moisture analysis instruments for mercury detection for first responders

    Working on a hazardous materials team means being prepared for the unexpected, from toxic chemicals to unidentified powders to overturned trucks. Should “the unexpected” ever include mercury and mercury vapor contamination incident response, trust Jerome mercury vapor analyzers to keep your team and your community safe.

    By Arizona Instrument LLC based in Chandler, ARIZONA (USA).

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