X-ray fluorescence analysis of silicate rocks using fused glass discs and a side-window Rh source tube: accuracy, precision and reproducibility

Couture, Rex A.; Smith, Michael S.; Dymek, R. F.

doi:10.1016/0009-2541(93)90326-e

Cited by 61 publications

(25 citation statements)

References 16 publications

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“…Major elements were determined by X-ray fluorescence (XRF) at the Modern Analysis Center, Nanjing University, following procedures described by Couture et al (1993). Rare earth and other trace elements were analyzed in the State Key Laboratory for Mineral Deposits Research of Nanjing…”

Section: Sampling and Analytical Methods For Geochronology And Geochementioning

confidence: 99%

Paleozoic tectonics of the southern Chinese Tianshan: Insights from structural, chronological and geochemical studies of the Heiyingshan ophiolitic mélange (NW China)

et al. 2011

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of the southern Chinese Tianshan: Insights from structural, chronological and geochemical studies of the Heiyingshan ophiolitic mélange (NW China). Tectonophysics, Elsevier, 2011, 497 (1-4) ABSTRACTIn the southern Chinese Tianshan, the southernmost part of the Central Asian Orogenic Belt (CAOB), widespread ophiolitic mélanges form distinct tectonic units that are crucial for understanding the formation of the CAOB. However, the polarity of oceanic subduction and age of orogeny are still in controversy. In order to better understand these geological problems, a comprehensive study was conducted on the

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Section: Sampling and Analytical Methods For Geochronology And Geochementioning

confidence: 99%

Paleozoic tectonics of the southern Chinese Tianshan: Insights from structural, chronological and geochemical studies of the Heiyingshan ophiolitic mélange (NW China)

et al. 2011

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“…XRF is capable of detecting elements from Al-U in concentrations from a parts-per-million range to 100%. Through the use of appropriate reference standards, XRF can accurately quantify the elemental composition of both solid and liquid samples (Couture 1993). It can analyze areas as small as 30 μm with sampling depths as great as 10 μm.…”

Section: X-ray Fluorescence (Xrf)mentioning

confidence: 99%

Review of Potential Candidate Stabilization Technologies for Liquid and Solid Secondary Waste Streams

Pierce¹,

Mattigod²,

Westsik³

et al. 2010

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Executive SummaryPacific Northwest National Laboratory has initiated a waste-form testing program to support the longterm durability evaluation of a waste form for secondary wastes generated from the treatment and immobilization of Hanford radioactive tank wastes. The purpose of the work discussed in this report is to identify candidate stabilization technologies and getters that have the potential to successfully treat the secondary waste stream liquid effluent, mainly from off-gas scrubbers and spent solids, produced by the Hanford Tank Waste Treatment and Immobilization Plant (WTP). Down-selection to the most promising stabilization processes/waste forms is needed to support the design of a solidification treatment unit (STU) to be added to the Effluent Treatment Facility (ETF). To support key decision processes, an initial screening of the secondary liquid waste forms must be completed by February 2010. Later, more comprehensive and longer term performance testing will be conducted, following the guidance provided by the secondary waste-form selection, development, and performance evaluation roadmap. The resulting waste form will be compliant to regulations and performance criteria and will lead to cost-effective disposal of the secondary wastes.This report starts with a brief review of some of the most commonly used solidification formulations that would be candidates for secondary liquid waste streams. In this review, the available data on performance are discussed, and some preliminary recommendations are provided for materials that should undergo additional screening testing. We also 1) discuss options for disposal of WTP secondary solid waste streams, 2) provide a brief overview of standard regulatory test methods used for measuring contaminant leachability and waste-form physical strength (with emphasis on the U.S. Environmental Protection Agency's [EPA's] new methods as a screening tool for comparing waste solidification materials of interest), and 3) provide an overview of factors that must be considered in long-term performance testing, including state-of-the-art characterization tools that can provide the data needed to technically defend predictive modeling simulations of long-term material behavior. The long-term wasteform testing and solid and leachate characterization must be robust enough to effectively predict material performance in the Integrated Disposal Facility over the 10,000-year period of performance for the engineered system. The solidification technologies for liquid waste streams include cement/grout, containerized Cast Stone, phosphate-bonded ceramics, alkali-aluminosilicate geopolymers, hydroceramics, L-TEM, and fluidized-bed steam reforming (FBSR). In addition to these, other mature technologies and two compounds, namely goethite and sodalite (that are still being developed), that show considerable promise as waste forms or getters are also discussed. It is our recommendation, based upon the available literature, that Cast Stone, chemically bonded phosphate ceramics (Ceramicrete...

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“…Each sample was mixed with a Pt wire loop to make a bead, and the resulting bead was polished prior to determining major element concentrations using an electron microprobe (20,21). Note that only the plumefront liquid contained enough mass of particles for the bulk chemical analyses.…”

Section: Characterization Of Effluentmentioning

confidence: 99%

Colloid Formation at Waste Plume Fronts

Wan

Tokunaga

Saiz

et al. 2004

Environ. Sci. Technol.

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X-ray fluorescence analysis of silicate rocks using fused glass discs and a side-window Rh source tube: accuracy, precision and reproducibility

Cited by 61 publications

References 16 publications

Paleozoic tectonics of the southern Chinese Tianshan: Insights from structural, chronological and geochemical studies of the Heiyingshan ophiolitic mélange (NW China)

Paleozoic tectonics of the southern Chinese Tianshan: Insights from structural, chronological and geochemical studies of the Heiyingshan ophiolitic mélange (NW China)

Review of Potential Candidate Stabilization Technologies for Liquid and Solid Secondary Waste Streams

Colloid Formation at Waste Plume Fronts

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