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groundwater toxicity Applications

  • Groundwater Monitoring for Remediation

    Many fresh water sources have been degraded to toxic levels by the inclusion of industrial, agricultural, and human waste products that have been discharged into the closest body of water, accidentally or deliberately for many years.

    By HERON Instruments Inc. based in Dundas, ONTARIO (CANADA).

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    Contaminated soil and building-rubble can be efficiently treated with VacuDry® technology, including a diverse range of toxic and hazardous substances. VacuDry® units also have low emissions and low power consumption, making on-site treatment with our mobile units both economically and environmentally sound. Find more informastion and the benefits of VacuDry® soil remediation plants on

    By econ industries GmbH based in Starnberg, GERMANY.

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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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    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).

  • Microbial Solutions for Soil Bioremediation

    The remediation of soils, sludge, and water require more than just the addition of packaged microbes.  Microbial Discovery Group can assist you in applying a total systems approach to soil bioremediation. Here in the US, sometimes we take for granted how precious it is to have non-contaminated soils and water. In many countries, industrial pollution has destroyed the soil and water ecosystems leading to toxic concerns and poor health. We at Microbial Discovery Group believe the remediation of soils, sludge and water require more than just the addition of packaged microbes. Applying a total systems approach to soil and water remediation has to be the primary focus of your bioaugmentation program. We are here to help you in that process. Lucky for us, many of the recalcitrant pollutants in the environment will serve as food sources to microbes.  By taking advantage of using natural processes to clean up contaminated sites, MDG provides solutions by speeding up the biodegradation of harmful chemicals. By rebalancing the system with the proper microbial processes, chemical breakdown will go from years to weeks.  Let MDG work with you to start cleaning up the world, one site at a time.

    By Microbial Discovery Group (MDG) based in Franklin, WISCONSIN (USA).

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    MPP water purification systems for groundwater remediation application

    Toxic hydrocarbons in groundwater can be found dissolved in water diffused over the area. At higher concentrations they can be present as DNAPLs (dense non-aqueous-phase liquids) or LNAPLS (light non-aqueous-phase liquids) creating an enduring source of toxic contaminant supply to the water phase.

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    Mercury monitoring for on-site remediation

    Fugitive emissions can be a health concern during removal and disposal of mercury-contaminated material at remediation sites. Thus, remediation projects either indoors or outdoors often require on-site, real-time mercury air monitoring with a Tekran 2537. This assures permitted levels are not exceeded during waste processing and human exposure levels are below government regulated toxicity thresholds. Often multiple sites must be monitored continuously. The Tekran 1115 Multi-Port Sampler is the ideal tool for multiplexing the Tekran 2537 for real-time continuous on-site monitoring of mercury fugitive emissions. Please contact us for more information on mercury remediation monitoring.

    By Tekran Instruments Corporation based in Knoxville, TENNESSEE (USA).

  • Air pollution control for soil remediation

    Epcon is known in the industry for the Soil Remediation Oxidizer, including Hazardous and Toxic Spills. Epcon Thermal OxidizerSystems, which operate in a very safe manner, clean up the toxic chemicals from the ground. We pre-test and pre-assemble the majority of systems in our 150,000 Sq. Ft. modern shop.

    By Epcon Industrial Systems, LP based in The Woodlands, TEXAS (USA).

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    Drinking water treatment

    Drinking water can be produced from any natural sources like groundwater, lakes and rivers (surface waters) or seawater. Drinking water standards are set by the World Health organisation or by the European Union. Drinking water must be free of suspended solids, microorganisms and toxic chemicals. Mineral concentration recommendation vary from country to country but most of the minerals have a maximum concentration recommended to ensure safe, equilibrated and pleasant water to drink.

    By Lenntech Water Treatment based in Delft, NETHERLANDS.

  • Sulfide Oxidation with Hydrogen Peroxide (H2O2)

    Sulfide Odor Control Sulfide is found throughout the environment as a result of both natural and industrial processes. Most sulfide found in nature was produced biologically (under anaerobic conditions) and occurs as free hydrogen sulfide (H2S) - characterized by its rotten egg odor. We are most likely to encounter biogenic H2S in sour groundwaters, swamps and marshes, natural gas deposits, and sewage collection/treatment systems. Manmade sources of H2S typically occur as a result of natural materials containing sulfur (e.g., coal, gas and oil) being refined into industrial products. For a variety of reasons - aesthetics (odor control), health (toxicity), ecological (oxygen depletion in receiving waters), and economic (corrosion of equipment and infrastructure) - sulfide laden wastewaters must be handled carefully and remediated before they can be released to the environment. Typical discharge limits for sulfide are < 1 mg/L. Sulfide Treatment Alternatives There are dozens of alternatives for treating sulfide laden waters, ranging from simple air stripping (for the low levels present in groundwaters) to elaborate sulfur recovery plants (used to treat several tons per day at refineries and coal burning power plants). There are processes based on biology (using compost filters, scrubbing media, or inhibition/disinfection), chemistry (oxidation, precipitation, absorption, and combination), and physics (adsorption, volatilization, and incineration). Each process occupies a niche which is often defined by the scale and continuity of treatment, whether the sulfide is in solution or is a gas, the concentration of sulfide involved, and the disposition of the sulfide containing medium. However, for reasons relating to convenience and flexibility, chemical oxidation (using hydrogen peroxide) continues to grow in its scope of application. Treatment with Hydrogen Peroxide While other peroxygens such as permonosulfuric (Caro’s) acid, peracetic acid, and persulfates will oxidize sulfide, their use for this application is overkill. Hydrogen peroxide (H2O2) is considerably simpler and more cost-effective. H2O2 may control sulfides in two ways, depending on the application: Prevention - by providing dissolved oxygen which inhibits the septic conditions which lead to biological sulfide formation; and Destruction - by oxidizing sulfide to elemental sulfur or sulfate ion.

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

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