water extraction Articles

  • Soil Vapor Extraction (In Situ)

    Introduction Soil vapor extraction (SVE) is an in situ unsaturated (vadose) zone soil remediation technology in which a vacuum is applied to the soil to induce the controlled flow of air and remove volatile and some semivolatile contaminants from the soil. The gas leaving the soil may be treated to recover or destroy the contaminants, depending on local and state air discharge regulations. ...

  • Using Solid Phase Extraction for Determination of Contaminants in Water

    Pesticides, Polychlorinated Biphenyls (PCBs), andpharmaceuticalsare a worldwide contamination problem. Because these contaminates are long lived in the environment and bioaccumulate throughout the food chain a great deal of research and regulations has been implemented. Several major US water bodies such as the Hudson River, St. Lawrence River, Fox River and the Great Lakes have been contaminated ...


    By Horizon Technology, Inc.

  • Sequential Extraction Procedure

    Sequential extraction is an analytical process that chemically leaches metals out of soil, sediment and sludge samples. The purpose of sequential “selective” extraction is to mimic the release of the selective metals into solution under various environmental conditions. One commonly used sequential extraction procedure is designed to partition different trace metals based on their ...


  • Emulsion breakingtechniques for oil in water solvent extractions

    Certain types of samples, such as those containing detergent, may form emulsions when doing an oil in water extraction into a solvent. The boundary between the solvent and the sample will have an emulsion layer that lias a cloudy or milky appearance as shown in tlris photo. According to U.S. EPA Method 1664, "if the emulsion is greater than one-third the volume of the solvent layer. Hie ...


    By Spectro Scientific

  • Sample extraction kit user’s guide

    Intended Use This extraction kit is for use with the appropriate immunoassay test kit. Each Sample Extraction kit contains the materials necessary to process twelve (12) soil or wipe samples. Test Principles The reagents contained in the Sample Extraction kit have been optimized for fast, efficient removal of compounds from soil or surfaces and convenient ...


  • Underground gasoline extraction made easier

    The Abanaki PetroXtractor® -Well Oil Skimmer, used for the removal of oil, fuel, and other floating hydrocarbons from water, where access is limited, was recently evaluated by BJAMM Environmental, Inc. of Canal Fulton, Ohio. Working closely with the Ohio EPA and the Bureau of Underground Storage Agency, this group of consultants deal primarily with gasoline stations using underground storage and ...


    By Abanaki Corporation

  • Soil Vapor Extraction (Ex Situ)

    Introduction: Ex situ soil vapor extraction (SVE) is a full-scale technology in which soil is excavated and placed over a network of aboveground piping to which a vacuum is applied to encourage volatilization of organics. Soil piles are generally covered with a geomembrane to prevent volatile emissions and to prevent the soil from becoming saturated by precipitation. The process includes a ...

  • Extraction well design for DNAPL recovery.

    The potential for downward migration of dense nonaqueous phase liquid (DNAPL) into deeper portions of a saturated hydrogeologic unit has important implications for successful groundwater remediation. Little information has been published regarding the design of extraction wells that allow DNAPL recovery without simultaneously creating a conduit for cross contamination by vertical migration ...


    By Hargis + Associates Inc

  • Thermally Enhanced Soil Vapor Extraction

    Introduction Thermally enhanced SVE is a full-scale technology that uses electrical resistance/electromagnetic/fiber optic/radio frequency heating or hot-air/steam injection to increase the volatilization rate of semi-volatiles and facilitate extraction. Thermally enhanced SVE is normally a short- to medium-term technology. Electrical Resistance Heating Electrical resistance heating uses ...

  • The Extraction of Glycols From Water Using ENVI-Carb™ Plus Solid Phase Extraction Cartridges

    The analysis of glycols such as propylene and ethylene glycol from water samples is traditionally done by direct aqueous injection into a gas chromatograph. Aqueous injections are problematic in GC analysis due to issues such as the large expansion volume of water in the inlet, increased carryover, and elevated detection limits. In this work, we have evaluated a unique carbon adsorbent, ENVI-Carb ...


    By MilliporeSigma

  • Water resources and the potential of brackish groundwater extraction in Egypt: a review

    A review of water resources in Egypt indicates that Nile water is fully utilized and the available quantity could potentially decrease by approximately 19% due to proposed water usage by neighboring countries. Seawater desalination and groundwater extraction are the only options to increase Egypt's water supply. The extraction and desalination of brackish groundwater is suggested ...


    By IWA Publishing

  • Fuzzy maximum power extraction control for a photovoltaic water pumping system

    AC loads present a delicate matter for photovoltaic systems, and this is because of the photovoltaic panel's operating point, which moves randomly according to irradiance changes; in this case, almost of photovoltaic water pumping systems use a DC–DC converter to ensure either the maximum power extracted from PV panel or the load needs. For AC motor pumps, an inverter must follow this chopper. ...


    By Inderscience Publishers

  • Modelling the palm kernel oil extraction process in a hot-water medium

    The physical process was modelled to create understanding and better assess the performance of a palm kernel oil extraction system. Mathematical models were developed to describe the extraction of palm kernel oil in hot-water from the comminuted particles. The models developed included parameters such as particle size, moisture content and charge ratio, all as a function of time. Experimental ...


    By Inderscience Publishers

  • Extraction, characterization and application of malva nut gum in water treatment

    In view of green developments in water treatment, plant-based flocculants have become the focus due to their safety, degradation and renewable properties. In addition, cost and energy-saving processes are preferable. In this study, malva nut gum (MNG), a new plant-based flocculant, and its composite with Fe in water treatment using single mode mixing are demonstrated. The result presents a ...


    By IWA Publishing

  • Case study - Shale gas extraction: frac water treatment

    The client The Client is a company which makes part of a Group based in the Eastern Europe and specialized in drilling activities and well services for the exploration/extraction industry. The Client’s needs Shale is a sedimentary rock that is predominantly comprised of consolidated clay-sized particles. Shale gas is produced from ...


    By EVALED-Evaporator

  • ENVI-Carb Plus for the Extraction of Propylene Glycol and Ethylene Glycol from Water

    ENVI-Carb Plus reversible cartridges were able to extract both propylene and ethylene glycol from water, and the method was demonstrated to be both quantitative and reproducible. Elution was achieved with a combination of organic solvents, offering further options for GC analysis such as sample concentration or solvent exchange. Direct injection of the elution solvent offered an improvement in ...


    By MilliporeSigma

  • Depth exposed membrane for water extraction (DEMWAX) for seawater desalination

    Introduction The Depth Exposed Membrane for Water Extraction (DEMWAX) is a novel approach to both fresh surface water treatment and seawater desalination that deploys a system directly within the source water body. The DEMWAXTM system is configured to take advantage of the natural (free) pressure of the source water body to drive a membrane process. This configuration has many advantages ...


    By EconoPure Water Systems, LLC

  • C18 extraction of atrazine for increased sensitivity in the RaPID Assay

    Performance of an increased sensitivity method utilizing an extraction and concentration step to increase analyte concentration of the assayed sample is presented. Recently, Shepard and Carr (1992) reported a method for increased detection of atrazine by gas chromatography using C18 solid-phase extraction (SPE) with a 10 mL water sample. An application with BakerbondÒ C18 SPE columns for ...


  • Simplifying the Screening Workflow for Extractables Testing: Infographic

    The safety of pharmaceuticals, cosmetics, and foodstuffs may be compromised by chemical compounds in the various types of packaging and food contact materials (FCMs) that are in direct contact with the consumer product. Due to continuously increasing global regulations, the characterization of extractables and ...


    By Climate Institute

  • Industrial Carpet Cleaners for Powerful Cleaning and Extraction

    Using industrial carpet cleaners is a three-step process: Apply pretreatment solution to the carpet. Inject and extract cleaning formula carpet with the wand. Allow the carpet to dry. Industrial carpet cleaners, as a result, need to offer effective cleaning and they should be able to extract maximum amount of dirt and moisture from the carpet. ...


    By Daimer Industries Inc.

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