method of extraction of chromium in sedments

method of extraction of chromium in sedments

  • Hexavalent Chromium Extraction from Soils: A Comparison

    Abstract: It has been shown that EPA Method 3060A does not adequately extract Cr(VI) from chromium ore processing residue (COPR). We modified various parameters of EPA 3060A toward understanding the transformation of COPR minerals in the alkaline extraction and

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  • Solvent extraction of chromium and cadmium from

    Read "Solvent extraction of chromium and cadmium from contaminated soils, Aiche Journal" on DeepDyve, the largest online rental service for scholarly research with thousands of academic publications available at your fingertips.

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  • Evaluation of Extraction Methods for Hexavalent Chromium

    Traditional methods for extraction of hexavalent chromium, Cr(VI), in soils, such as SW846 Method 3060A, can be tedious and are not always compatible with some determination methods.

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  • (PDF) Hexavalent Chromium Extraction from Soils: A

    the soil sample extraction method combinations in which Native CrM) was not detected in the unspiked quartz CrZ03was used as a spike, indicating that methodinduced sand, loam soil, or anoxic sediment ((1 mg kgI] and oxidation of Crz03 is an unlikely artifact in the heated soluble CrM) spikes were recovered completely (100 carbonatehydroxide method.

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  • Comparison of methods for the removal of organic carbon

    Comparison of methods for the removal of organic carbon and extraction of chromium, iron and manganese from an estuarine sediment standard and sediment from the Calcasieu River estuary, Louisiana, U.S.A.

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  • US7670576B2 Methods of treatment of chromite ore

    Referring to FIG. 1, an ex situ method to reduce hexavalent chromium in COPR, soils or sediments includes contacting the COPR with an oxygen scavenger or chemical reducer and a source of ferrous sulfide to effect the chemical reduction of Cr(VI) to a less toxic and less mobile valence state.

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  • Selective extraction of chromium(VI) using a leaching

    For total chromium extraction from soil and sediment samples, 10.0 ml of aqua regia was added to 0.51.0 g portions of dry soils and dry sediment. The

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  • A method of producing an ion exchanger for the extraction

    The invention is directed to solving the task of creating inorganic ion exchanger for the extraction of chromium (VI) from solutions with pH 68 having a high exchange capacity when working in cycles of sorptiondesorption.

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  • Investigations of Sequential Extraction of Chromium from

    Different separation/detection methods (ion exchange, organic extraction, spectrophotometry) and four extraction media have been compared for the speciation of chromium.

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  • METHOD 3060A ALKALINE DIGESTION FOR HEXAVALENT

    1.2 Method 3060 is an alkaline digestion procedure for extracting hexavalent chromium [C r(VI)] from soluble, adsorbed, and precipitated forms of chromium compounds in soils, sludges, sediments, and similar waste materials.

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