contaminant sampling Articles

  • Train derailment prompts contaminated land investigation - Case study

    On March 30th 2015 a long freight train, transporting a variety of goods including lumber and chemicals, wound its way through the state of Mississippi. At around 5pm, part of the train failed to negotiate a curved portion of the track in a rural area near Minter City, resulting in the derailment of nine railcars, one of which leaked chemicals onto agricultural farmland and woodlands. Emergency ...


    By Gasmet Technologies Oy

  • Passive sampling methods for contaminated sediments: State of the science for organic contaminants

    This manuscript surveys the literature on passive sampler methods (PSMs) used in contaminated sediments to assess the chemical activity of organic contaminants. The chemical activity in turn dictates the reactivity and bioavailability of contaminants in sediment. Approaches to measure specific binding of compounds to sediment components, e.g., amorphous carbon or specific types of reduced ...


    By John Wiley & Sons, Ltd.

  • Geostatistical Sampling Optimization and Waste Characterization of Contaminated Premises

    Abstract This methodological study presents a geostatistical approach suitable for radiological evaluation in nuclear premises. By modelling the spatial continuity of activities, geostatistics provide sound methods to estimate and map radiological activities, together with their uncertainty. The main geostatistical principles are first recalled and illustrated on a real premise ...


    By Geovariances

  • Mineral oil contamination in dry food samples

    SpeedExtractor E-916: Optimization of pressurized solvent extraction (PSE) for the rapid and efficient determination of MOSH and MOAH in dry food samples Many food samples are contaminated with mineral oil coming from different sources. One possible source of contamination is the migration from cardboard packaging made of recycled fibers. Other sources of contamination with mineral oils ...


    By BÜCHI Labortechnik AG

  • SupelMIP SPE for Sample Cleanup and Analysis of Food and Environmental Contaminants

    MIP SPE was successfully used for extraction of multiple classes of food and environmental contaminants from difficult matrices, such as egg, oil and flour. • Six nitroimidazoles were extracted from egg and milk with recoveries typically over 90%. • Among NSAIDs compounds, acidic compounds gave good recoveries between 100-115% while non-acidic compounds gave less desirable recoveries ...


    By MilliporeSigma

  • Passive sampling in contaminated sediment assessment: Building consensus to improve decision‐making

    Contaminated sediments pose an on‐going, pervasive, global challenge to environmental managers as sediments can reflect a legacy of pollution that can impair the beneficial uses of water bodies. A formidable challenge in assessing the risks of contaminated sediments has been elucidation and measurement of contaminant bioavailability, expressed as the freely dissolved concentration (Cfree) in ...


    By John Wiley & Sons, Ltd.

  • Monitoring Airborne Contaminants in Workplace Atmospheres, Using Sampling Devices and GC or HPLC

    Workers' exposure to hazardous substances must be held within acceptable limits. Therefore, airborne contaminant vapor and particles (including aerosols) in industrial atmospheres must be monitored. In the United States, the National Institute for Occupational Safety and Health (NIOSH) and the Occupational Safety and Health Administration (OSHA) offer, for many such substances, specific ...


    By MilliporeSigma

  • Passive sampling methods for contaminated sediments: Risk assessment and management

    This paper details how activity‐based passive sampling methods (PSMs), which provide information on bioavailability in terms of freely dissolved contaminant concentrations (Cfree), can be used to better inform risk management decision‐making at multiple points in the process of assessing and managing contaminated sediment sites. Because Cfree is a better predictor of bioavailability than total ...


    By John Wiley & Sons, Ltd.

  • Passive sampling methods for contaminated sediments: Practical guidance for selection, calibration, and implementation

    This manuscript provides practical guidance on the use of passive sampling methods (PSMs) that target the freely dissolved concentration (Cfree) for improved exposure assessment of hydrophobic organic chemicals in sediments. Primary considerations for selecting a PSM for a specific application include clear delineation of measurement goals for Cfree, whether laboratory‐based “ex‐situ” and/or ...


    By John Wiley & Sons, Ltd.

  • Passive sampling methods for contaminated sediments: State of the science for metals

    It is generally accepted that “dissolved” concentrations of contaminants in sediment pore water (Cfree) provide a more relevant exposure metric for risk assessment than do total concentrations. Passive sampling methods (PSMs) for estimating Cfree offer the potential for cost‐efficient and accurate in situ characterization of Cfree for inorganic sediment contaminants. In contrast to the PSMs ...


    By John Wiley & Sons, Ltd.

  • Bioremediation of pollutant-contaminated water

    Raw water resources in Kafr El-Sheikh Governorate are affected by many contaminants particularly during the winter season and low demand period of the Nile River, in which water level decreases and organic matter increases resulting in decreased dissolved oxygen, and increased ammonia, nitrite and bacterial load in the water. In this study, physicochemical and microbiological characteristics ...


    By IWA Publishing

  • Contamination/Environmental case study

    Orlando Drum Company, Orlando, FL Facility washes and reconditions used drums Mercuri and Associates, Inc. was retained as hydrogeological consultant to verify state allegations of contamination of soil and ground water with heavy metals, pesticides, and volatile organic compounds. Initiated preliminary soil and groundwater sampling program, prepared/submitted ...


    By Mercuri & Associates, Inc.

  • Fighting soil contamination with XRF

    Soil contamination Complying with new environmental regulations is a fast growing concern for companies and local officials tasked with ensuring that industries reduce pollution and clean up after themselves. It’s a particularly challenging issue when it comes to soil contamination It’s not always easy to detect as it silently contaminates crops and the ground water supply. XRF ...

  • Monitoring Metal Contamination in Water

    Metal contamination in drinking and source water has proven to have economic and health impacts on the human race. Regulatory agencies understand the importance of remediating metal contamination in our water supply to ensure safe consumption of drinking water. In order to properly remediate our water supplies, one must first determine cause of contamination and the source of the problem. ...


    By IWA Publishing

  • Mineral oil contaminations in cardboard

    SpeedExtractor E-916: Optimization of pressurized solvent extraction (PSE) for the rapid and efficient determination of MOSH and MOAH in cardboard Many food samples are often contaminated with mineral oil coming from different sources. One possible source of contamination is the migration from cardboard packaging made of recycled fibres. ...


    By BÜCHI Labortechnik AG

  • Contaminated soil remediation - Inverurie

    Remove Contaminated Soil from Residential Gardens & Re-Landscape Client: MTM Construction Consultant: WA Fairhurst and Partners Challenge: Advise on the removal of contaminated material from a residential area built on a former town gas site. Reinstate existing landscaping. Applied ...


    By Soilutions Ltd

  • Bioremediating Explosives Contaminated Soil

    From the beginning of World War II until the 1970s, the site that is now the Naval Surface Warfare Center in Crane, Indiana (NSWC-Crane) was the home of a major bomb manufacturing operation. Explosive compounds such as TNT, Royal Demolition Explosives (RDX) and Her Majesty’s Explosive (HMX) were handled loose and drifted through air vents. Often, the material settled on the roofs of buildings, ...


    By BioCycle Magazine

  • Technical Bulletin: Multilevel Sampling

    The topic of this CL:AIRE Technical Bulletin is multilevel sampling systems for characterising contaminated groundwater. Contaminated groundwater can present considerable problems for landowners: it can occur at significant depth, sources of the contamination are not often obvious, it can migrate from one property to another, and groundwater flow directions can be altered due to seasonal ...


    By Solinst Canada Ltd.

  • Passive sampling methods for contaminated sediments: Scientific rationale supporting use of freely dissolved concentrations

    Passive sampling methods (PSMs) allow the quantification of the freely dissolved concentration (Cfree) of an organic contaminant even in complex matrices such as sediments. Cfree is directly related to a contaminant's chemical activity, which drives spontaneous processes including diffusive uptake into benthic organisms and exchange with the overlying water column. Consequently, Cfree provides ...


    By John Wiley & Sons, Ltd.

  • Fate Of Polychlorinated Biphenyls In A Contaminated Lake Ecosystem: Combining Equilibrium Passive Sampling Of Sediment And Water With Total Concentration Measurements Of Biota

    Equilibrium sampling devices (ESDs) can be applied to study and monitor the exposure and fate of hydrophobic organic chemicals (HOCs) on a thermodynamic basis. ESDs can be used to determine freely dissolved concentrations and chemical activity ratios, and to predict equilibrium partitioning concentrations of HOCs in biota lipids. Our aim was to assess the equilibrium status of polychlorinated ...


    By John Wiley & Sons, Ltd.

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