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Showing 1 to 15 of 15 for “"Phosphate minerals"”.
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Stratigraphic setting of some new and rare phosphate minerals in the Yukon Territory
… which led to the development of a spectacular phosphate occurrence. Strata were deposited in an environment without currents but of relatively shallow depth, probably just below storm-wave base. The deposit formed on the west side of the penecontemporaneous Cache Creek High. Fluctuations in sea …
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The Effect of Composition on the High-Pressure Behavior of Rare-Earth Phosphate Minerals
… can be used to predict K0 for other rare-earth phosphates. Comparison of these studies, performed under hydrostatic conditions, with previous studies show that MPO4 structures are sensitive to shear stresses created from non-hydrostatic environments. The first structural study of a monazite, …
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Applications of phytase-mediated phosphate biomineralizaton for the remediation of uranium mine tailings
… including naturally occurring radionuclides.;Phosphate mineral phases have been researched as a method of immobilising contaminants including lead, radium, and uranium as natural analogues demonstrate that these metals can be stably incorporated into phosphate minerals over geological …
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Potential commercial application of a bi-layer bone-ligament regeneration scaffold to anterior cruciate ligament replacement
… collagen, chodroitin-6-sulphate, and calcium phosphate minerals and the use of lyophilization to create a network where all the materials are homogeneously dispersed and present in significant amounts. This process allows the creation of a porous network whose physical characteristics, …
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Mineral-Surface Chemistry of Hydroxyapatite and Urea-Rich Solutions
… caused by its habitual presence in insoluble phosphate mineral sources. Recent research has found that insoluble phosphate minerals, when combined with urea-rich solvents, can release sequestered phosphate into solution and promote mineral transformation to more soluble secondary minerals.</p> …
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The effects of biochar on trace element and nutrient solubility in the presence of low-molecular-weight organic acids
… enhanced nitrate removal. Biochar did not affect phosphate removal. Biochar inhibited the LMWOA-driven solubilisation of soil-borne cadmium and zinc. Nitrate immobilisation was not enhanced but biochar reduced the immobilisation of the added nitrate overall. Phosphate immobilisation was observed …
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Phosphate-mineral interactions and potential consequences for nutrient cycling
Biogeochemical cycling of phosphate is a key component in the overall production rate of coastal ecosystems. Mineral phases in the near-shore sediments play a significant role in the return of phosphate remineralized in the upper sediments to the water column. Sequential Extraction (SEDEX) of the …
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Characterizing the mechanism and rate of calcium phosphate precipitation in aerobic granular sludge
… recovery through the precipitation of calcium phosphate minerals within the granule1–3. A rigorous understanding of precipitation mechanism and rate has been limited by simultaneous biological uptake and release of phosphate and cations. As a result, more work is needed to better understand how …
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A mineralogical study of the Harmon lignite bed, Bullion Creek Formation (Paleocene), Bowman County, North Dakota
… County, North Dakota showed that most of the minerals in the coal lithobodies were detrital in origin and that variable ash deposition during combustion may be caused by variations in types and quantities of mineral phases. </p><p> The Harmon bed is part of the Bullion Creek Formation …
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Sedimentology and diagenesis of Ediacaran phosphorites from South China
… frequently alter or overprint primary minerals and structures, necessitating validation of results from mineralogical and geochemical analyses and determinations of fossil affinities. Therefore, it is imperative to unravel the complications of post-depositional alteration, and thus …
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Bioactive Poly(Lactic-co-Glycolic Acid)-Calcium Phosphate Scaffolds for Bone Tissue Regeneration
… Hydroxyapatite (HAP) and tricalcium phosphate have been used in conjunction with polymer scaffolds due to their osteoconductivity and biocompatibility, but they often lack osteoinductivity and are resistant to biodegradation. Conversely, amorphous calcium phosphate (ACP) is a mineral …
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Sorption of lead and arsenic on soil components and effectiveness of phosphates for remediating lead and arsenic contaminated soils
… as well as serious threats to humans. Clay minerals are potential binding agents for pollutants due to their high cation exchange capacity and large surface area. Laboratory investigations were undertaken to evaluate the effect of Fe and Al hydrous oxide coatings on the sorption of Pb and …
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Factors influencing the mobility of uranium, thorium and rare earth elements at the Steenkampskraal monazite, North Western Cape
… Groundwater contamination by REE-bearing phosphate minerals has resulted in measurable concentrations of U, Th and REE in all mine waters and boreholes in the near vicinity of the mine. The chondritenormalized REE patterns of the water samples are sin1ilar to those displayed by monazite, …
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Phosphorus Pathways In Deep Time
… P in our Solar System is stored in the form of minerals. Phosphorus-bearing minerals preserve information on pressures and temperatures experienced both during their initial formation and across the subsequent reaches of geological time. These minerals act as useful tools for probing the …