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toxic metal Applications

  • Laser & Plasma Cutting

    Laser & Plasma Cutting fumes are Unbreathable. Using laser or plasma cutting equipment on either metals or plastics introduces several known carcinogens, such as fused silica and ethyl acrylate, into the air. Occupational Health and Safety organizations recommend reducing personal exposure to the lowest level feasible. Hand held plasma cutting provides metalworkers with a quick and fast way to cut large sheets of metal material. However, plasma and oxy cutting generate a large amount of sparks, slag and fume which can contain different pollutants depending on the type of material being cut. Diversitech's line of downdraft tables incorporating the plasma cutting kit are designed to extinguish the sparks and slag, using heavy duty steel bar grating and a gravel filled baffle tray while the blower pulls away all of the toxic plasma cutting fumes. When considering how to capture and filter the fumes generated from large CNC plasma cutting and laser cutting machines, a large central dust

    By DiversiTech based in Montreal, QUEBEC (CANADA).

  • Soldering Fume Extraction

    Soldering fumes are Unbreathable. Soldering enables the joining of metal parts by melting a filler metal to attach wires and other metallic components. The fumes generated from melting solder especially solder containing Lead or Tin present are dangerous and require local ventilation to remove harmful smoke from the work area. Soldering application need to be properly ventilated to prevent toxic fumes from reaching the worker`s breathing zone. There are a number of different industries such as the electronics assembly industry and electronics repair comapnies who must deal with the hazards of solder smoke. Fumes created by automated PCB soldering including wave soldering machines, handheld soldering irons, torch brazing and furnance brazing are often ignored because of the small volume of smoke generated. However, these applications still require careful consideration as dangerous fumes can impair employee’s respiratory tracts depending on the filler metals used. Because manual soldering applications require working with tiny components, workers end up positioning their heads right above toxic rosin or lead solder fumes with a direct exposure into their throat, nasal passages and lungs, and as a result, they can experience respiratory complications. Rosin irritation can cause various side effects and the inhalation of lead fumes is carcinogenic. As lead oxide smoke collects in your lungs, it can be transferred into your bloodstream. Diversitech recommends installing soldering fume extraction equipment to prevent the inhalation of dangerous fumes. These ventilation units will not only protect each person working at a soldering station when installed and positioned correctly, but they will also prevent fumes from contaminating other worker’s lungs.?

    By DiversiTech based in Montreal, QUEBEC (CANADA).

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    Metal Stabilization

    In-situ geochemical fixation using a chemical reductant such as Remotox (calcium polysulfide) converts the soluble toxic metals into insoluble non-toxic compounds. Remotox has proven to be effective under a wide range of conditions. It is considered more stable and persistent than other reductants in subsurface environments, and is relatively safe to handle in the field and easy to apply.

    By Graus Chemicals, LLC based in Glendale, ARIZONA (USA).

  • Gas detection for the steel industry

    Regarded by many as providing the backbone to modern society, the steel industry is one which continues to evolve. Whether it is geographic shifts in demand or production, or challenges brought by energy or raw material costs, companies continue to develop their processes and facilities to meet them. Alongside these changes companies have also realised the requirement to minimise downtime due to unplanned maintenance and protect workers from exposure to toxic or flammable gas hazards.

    By Crowcon Detection Instruments Ltd - a Halma company based in Milton Park, UNITED KINGDOM.

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    ph determination for soil testing

    Determination of the pH value provides information about the acid or base action of the soil solution. This in turn is enormously important for the nutrient supply and microbial activity of the soil. For example, many metals (trace elements) are considerably more mobile in acidic soils. If the soil pH values are very low, toxic levels can soon be reached and these can damage the roots of plants. On the other hand, excessively high pH values quickly lead to a shortage of trace elements because of immobilization.

    By Metrohm AG based in Herisau, SWITZERLAND.

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    Waste recovery for mining wastes

    Mining waste typically arises from the limitation of the installed technologies of an operation, e.g. where fines cannot be tolerated. They are associated with mine workings and often contain valuable and/or hazardous materials. The hazardous content, which are often the valuable fractions within this waste are typically metals. Spread of metal toxicants in association with tailings particles, through a combination of wind dispersion or if washed into the soil or rivers, can have a highly damaging effect on the environment. Crucially, as time moves on, the mine tailing of one generation become the resource of the next.

    By Tetronics (International) Limited based in Swindon, UNITED KINGDOM.

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    Waste recovery for energy & utilities

    In order to stay competitive and to be seen as being environmentally responsible, energy and utility companies are always looking for alternative routes to generate power. One method of doing this is by leveraging waste to energy incineration plants linked to the processing municipal solid waste. During this incineration process, APC residues, which are a mixture of fly ash, organic pollutants (including dioxins and furans), are generated and are classified as hazardous waste and have a detrimental environmental impact. This fly ash is subject to Air Pollution Control as it is contaminated with extremely high concentrations of heavy metals and toxic compounds like dioxins, linked to cancer and other health problems. Tetronics offers valuable waste recovery plants that can eliminate the hazardous element within the fly ash while generating an inert building aggregate with the remaining material.

    By Tetronics (International) Limited based in Swindon, UNITED KINGDOM.

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    Environmental testing & compliance screening for energy/environmental sector

    Compliance screening and testing is often carried out during the manufacturing phase of a product, and all the way through its disposal or recycling process. It ensures that products and materials meet specific standards or comply with international and local directives or regulations. These standards and regulations are introduced to ensure the quality and safety of a product, and to minimise or eliminate its negative impact on the environment and people. Examples of products or materials tested are: electrical and electronic equipment (for compliance with the Restriction of Hazardous Substances (RoHS) directive), waste oils, soil (soil remediation depending on contents of toxic metals), children’s products (for compliance with Consumer Product Safety Improvement Act of 2008), etc.

    By Oxford Instruments plc based in Abingdon, UNITED KINGDOM.

  • XRF analysis for environmental applications

    Niton analysers are versatile environmental testing instruments that provide valuable assistance in portable soil testing applications such as brownfield site investigation. With the ability to analyse a wide range of materials, our instruments provide lab-quality soil/sediment chemistry in seconds. Lead, arsenic, cadmium, chromium, and other toxic metals contaminate sites of former industrial and agricultural activity around the world. Whatever the reasons for these occurrences, these pollutants cannot be ignored – particularly as environmental consciousness and regulatory initiatives grow.

    By Niton UK Limited based in Woodmancott, Winchester, UNITED KINGDOM.

  • XRF analysis for product testing & toy safety

    Each week brings a new report of problems with toy safety and consumer product safety. Ultimately, contract manufacturers, importers, distributors, retailers and brand owners all face potential liability when they fail to comply with laws which restrict the levels of toxic materials in their products. Handheld Niton analysers provide quick and easy screening of toys and other consumer goods for lead, cadmium, mercury and other toxic metals. Importers, brand owners and retailers can implement a standardised inspection protocol for incoming shipments to verify compliance, while simultaneously requiring supply chain documentation based on empirical testing.

    By Niton UK Limited based in Woodmancott, Winchester, UNITED KINGDOM.

  • 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).

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