Cold acid extraction of copper from soils and sediments; a proposed field method

Canney, Frank Cogswell; Hawkins, Daniel B.

doi:10.2113/gsecongeo.53.7.877

Cited by 13 publications

(6 citation statements)

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“…This was designed such that in the 60 minute extraction period, substrate mineral dissolution is minimal, while most of the surface coatings are removed. This method has been used by others [5,6] in the dissolution of metal oxides found in soils as both coatings and detrital minerals. In addition to oxide dissolution, the extraction also dissolves carbonate minerals and may exchange ions bound to both inorganic and organic phases.…”

Section: Resultsmentioning

confidence: 99%

A Kinetic Study of Cation Release from a Mixed Mineral Assemblage : Implications for Determination of Uranium Uptake

Fenton

Waite

1996

Radiochimica Acta

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The uptake of U(VI) as UO! + on a natural complex mineral assemblage has been studied using batch selective chemical extraction techniques and secondary ion mass spectroscopy (SIMS). Sediments used in the study consisted of a quartz/mica schist collected from the locale of the Koongarra Uranium ore body, Alligator Rivers Uranium Province, Northern Territory, Australia. The bulk sediment was gravity separated into four size fractions, with attention focused on the nominally <25 μπι and 250-1000 μηι fractions of the bulk sample, in order to assess the effects of particle size on uranium uptake. Investigation of the kinetics of elemental release in the presence of selective extractants show that uranium is bound largely within the iron and aluminium oxyhydroxides of the assemblage, with a highly mobile fraction of this associated with aluminol sites. SIMS analysis of the natural substrate confirms that significant quantities of aluminium are present in surface layers. The effect of particle size on the uptake of uranium indicates very little change with respect to particle size. This finding may be attributed to the presence of highly porous surface coatings.

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Section: Resultsmentioning

confidence: 99%

A Kinetic Study of Cation Release from a Mixed Mineral Assemblage : Implications for Determination of Uranium Uptake

Fenton

Waite

1996

Radiochimica Acta

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“…The sediments were analyzed for 12 elements by emission spectroscopy, for total copper, lead, and zinc by atomic absorption, and for acid-extractable copper, lead, and zinc by a 0.8-nitric acid-leach atomic absorption method. Cold extraction coloriraetric methods, for citrate-soluble heavy metals (Bloom, 1955) and 6AMiydrochloric-acid-soluble copper (Canney and Hawkins, 1958), were adapted for field use and provided invaluable analytical data at the sample site. Minimum and maximum contents given where two or more samples were collected at one locality.…”

Section: Sampling and Analytical Methodsmentioning

confidence: 99%

Mineral resources of the Scotchman Peak Wilderness Study Area, Lincoln and Sanders counties, Montana, and Bonner County, Idaho

Earhart¹,

Kleinkopf²,

Wilson³

et al. 1981

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In accordance with the provisions of the Wilderness Act (Public Law 88-577, September 3, 1964) and the Joint Conference Report on Senate Bill 4, 88th Congress, the U.S. Geological Survey and U.S. Bureau of Mines have been conducting mineral surveys of wilderness and primitive areas. Studies and reports of all primitive areas have been completed. Areas officially designated as "wilderness," "wild," or "canoe" when the Act was passed were incorporated into the National Wilderness Preservation System, and some of them are currently being studied. The Act provided that areas under consideration for wilderness designation should be studied for suitability for incorporation into the Wilderness System. The mineral surveys constitute one aspect of the suitability studies. This report discusses the results of a mineral survey of some national forest lands in the Scotchman Peak study area, Idaho, that are being considered for wilderness designation.

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“…The analytical methodology needs to be geared to the problem. If the problem is simply that of locating relatively large targets or favourable areas, then the cold extractible copper procedures (Canney and Hawkins, 1958;Holman, 1956) or the simple spot test for molybdenum minerals recently described by Griffitts et a1. (1976) may suffice.…”

Section: Methodsmentioning

confidence: 99%

Analytical methodology in the search for metallic ores

Ward¹,

Bondar²

1979

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Atomic absorption and emission spectrography are the methods of analysis most widely used in geochemical exploration. Development of nonflame atomizers, particularly electrothermal devices and reduction cells for atom and metal-hydride generation, has expanded the application of atomic absorption spectrometry by pushing detection limits of many elements well into the parts per billion range and by reducing detection limits for others, such as As, Se, Te, and Sn, to levels useful in lithogeochemical surveys. The recent promotion of inductively-coupled plasma sources for excitation, as well as other variations, such as use of echelle gratings, has increased the number of available spectrographic methods for multielement surveys and has simplified the application of partial extraction techniques in emission spectrography. Other methods that require mass spectrometers and gas chromatographs are being used to measure volatile indicator elements and compounds such as helium and sulphur gases. Analytical techniques, including those based on voltammetry, ion-selective electrodes, and the use of partial or selective extractions, are finding increased application as analytical tools and as aids in determining metal speciation better to understand geochemical processes of dispersion and concentration. Current interest in uranium exploration has sparked a major effort to develop new analytical methods or improve existing ones for the determination of uranium and related radionuclides. Exploration geologists may now choose conventional fluorimetry, delayed neutron counting, X-ray fluorescence, laser-induced fluorescence, and nuclear-fission track techniques for the determination of uranium. The choice will depend on sensitivity required, sample media being analyzed, chemical species of the uranium to be determined, turnaround time required, and cost considerations. Two of the methods described, conventional fluorimetry and laser-induced fluorescence, can be adapted for use in the field. While recent developments of new techniques and apparatus have greatly expanded the number of usefUl analytical techniques in exploration geochemistry, each has its own problems and limitations as well as its applications. A panacea for analytical problems does not yet exist, except perhaps in the person of the skilled analyst, whose ingenuity in developing and applying new methods augments diligent application of tried and true procedures. Resume Pour l'exploration geochimique, les methodes d'analyse les plus frequemment employees sont la spectrophotometrie d'absorption atomique et la spectrographie d'emission. La mise au point de methodes spectrophotometriques sans flamme, en particulier d'appareils electrothermiques et de cellules reductrices permettant d'obtenir des atomes et des hydrures metalliques, a elargi les applications de la spectrophotometrie d'absorption atomique, en poussant les limites de detection de nombreux e1ements jusqu'a la gamme des parties par milliard, et en reduisant les limites de detection d'autres elements, comme A...

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Cold acid extraction of copper from soils and sediments; a proposed field method

Cited by 13 publications

References 0 publications

A Kinetic Study of Cation Release from a Mixed Mineral Assemblage : Implications for Determination of Uranium Uptake

A Kinetic Study of Cation Release from a Mixed Mineral Assemblage : Implications for Determination of Uranium Uptake

Mineral resources of the Scotchman Peak Wilderness Study Area, Lincoln and Sanders counties, Montana, and Bonner County, Idaho

Analytical methodology in the search for metallic ores

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