phosphorus in apatite

Geochemistry of phosphorus and the behavior of apatite ...

The concentration of phosphorus in glassy melt inclusions and rehomogenized nanogranitoids suggests a strong control of melt aluminosity on apatite solubility in peraluminous granites, which is consistent with existing experimental studies.

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Apatite and phosphorus in mantle source regions: An ...

1980-12-1  Apatite and phosphorus in the source regions of basic magmas 4.1. Evidence for apatite in the upper mantle The first question to be dealt with in addressing the topic of residual apatite in the mantle is whether apatite is present even before the onset of melting. As noted previously, thermodynamic calculations indi- cate that fluorapatite is ...

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Apatite and phosphorus in mantle source regions: An ...

Because of the high solubility of apatite in basic magmas, phosphorus can be confidently treated as an incompatible element in peridotite melting models. Such models, in combination with observed characteristics of basic lavas, indicate that the upper mantle contains ∼200 ppm of phosphorus, much less than the chondritic abundance of ∼900 ppm.

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Solubilization of Phosphorus from Apatite by Sulfuric Acid ...

The phosphorus (P) present in apatitic materials is largely in forms that are not readily available for most arable crops. Many attempts have been made to increase the dissolution of phosphate rock. Hence, soluble P or superphosphate used as fertilizer has been produced by

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Apatite as an interesting seed to remove phosphorus from ...

After more than 550 days feeding, sorption was still present and low P outlet levels were still being obtained when sufficient contact time and calcium content in the solution were ensured. This work demonstrates the advantages of using apatites for phosphorus removal in constructed wetlands. The behaviour of apatite in phosphorus retention is ...

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Transformation of apatite phosphorus and non-apatite ...

The recovery of phosphorus from incinerated sewage sludge ash (SSA) is assumed to be economical. Transformation from non-apatite inorganic phosphorus (NAIP) to apatite phosphorus (AP), which has a higher bioavailability and more extensive industrial applications, was studied at 750-950°C by sewage sludge incineration and model compound incineration with a calcium oxide (CaO) additive.

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Phosphorous availability influences the dissolution of ...

2015-3-4  Although apatite is the predominant form of mineral phosphorus in the Earth’s crust, biological forms (i.e. dental and skeletal apatite) have received most attention in kinetic studies. Dissolution experiments with fluorapatite under geologically relevant conditions demonstrate that rates are

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Apatite weathering and the Phanerozoic phosphorus cycle ...

If phosphorus is the ultimate controlling nutrient over geologic time scales, then long-term marine NEP is coupled to the release of phosphorus from apatite weathering. The most abundant apatite compositions found in nature are igneous fluorapatite and marine sedimentary carbonate fluorapatite.

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Synthetic apatite nanoparticles as a phosphorus fertilizer ...

2014-7-14  Some soluble phosphate salts, heavily used in agriculture as highly effective phosphorus (P) fertilizers, cause surface water eutrophication, while solid phosphates are less effective in supplying ...

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Phosphate Deposits - USGS

2010-8-9  leaching. Phosphate leached from guano phosphatizes the underlying rocks in some areas, forming apatite where the host rock is limestone and forming aluminum- or aluminum-iron-phosphate minerals where the underlying rock is a silicate. Individual

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Geochemistry of phosphorus and the behavior of apatite ...

The concentration of phosphorus in glassy melt inclusions and rehomogenized nanogranitoids suggests a strong control of melt aluminosity on apatite solubility in peraluminous granites, which is consistent with existing experimental studies.

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Apatite weathering and the Phanerozoic phosphorus cycle ...

If phosphorus is the ultimate controlling nutrient over geologic time scales, then long-term marine NEP is coupled to the release of phosphorus from apatite weathering. The most abundant apatite compositions found in nature are igneous fluorapatite and marine sedimentary carbonate fluorapatite.

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(PDF) Apatite weathering and the Phanerozoic phosphorus

The weathering of apatite, the primary phosphorus sink in Earth's exosphere, controls long-term phosphorus availability. If phosphorus is the ultimate controlling nutrient over geologic time ...

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Transformation of phosphorus in the wadden sea: Apatite ...

Between February 1992 and June 1993 the distribution of particulate and dissolved phosphorus in the Ems estuary was investigated in approximately monthly intervals. Furthermore, the phosphorus content of sediments was assessed. These data as well as literature data were used to construct a phosphorus budget of the Ems estuary. Fluxes were dominated by the particulate fraction representing 77% ...

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The role of brushite and octacalcium phosphate in apatite ...

Studies of apatite mineral formation are complicated by the possibility of forming several calcium phosphate phases. The least soluble, hydroxyapatite (HAP), is preferentially formed under neutral or basic conditions. In more acidic solutions phases such as dicalcium phosphate dihydrate (Brushite, D

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Apatite as an interesting seed to remove phosphorus from ...

2005-5-1  In parallel, observation of the material by electron microscopy was used to give more precision information about the mechanisms involved. This work reveals the strong chemical affinity between apatites and phosphorus. Compared to other calcareous

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Apatite: From Crystals to Phosphate Rock Rock Gem

2020-11-5  Apatite: From Crystals to Phosphate Rock. Phosphate rock, which consists largely of microcrystalline apatite-group minerals, is the basis of a multi-billion-dollar mining industry. (Wikimedia Commons) With their stubby, terminated, hexagonal prisms, glassy transparency, and soft, yellow-to-greenish-yellow or blue colors, apatite crystals are a ...

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The initial and residual value for subterranean clover of ...

The residual value of phosphorus from superphosphate, crandallite rock phosphate (Christmas Island C-grade ore), 500°C calcined crandallite rock phosphate (Calciphos) and apatite rock phosphate from Queensland, Australia, was measured in a 6 year field experiment sited on lateritic soil in south-western Australia. Different amounts of each fertilizer were applied at the commencement of the ...

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Phosphate Deposits - USGS

2010-8-9  leaching. Phosphate leached from guano phosphatizes the underlying rocks in some areas, forming apatite where the host rock is limestone and forming aluminum- or aluminum-iron-phosphate minerals where the underlying rock is a silicate. Individual

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The role of intracellular calcium phosphate in osteoblast ...

2 天前  The role of intracellular calcium phosphate in osteoblast-mediated bone apatite formation Suwimon Boonrungsimana, Eileen Gentlemana,b,c, Raffaella Carzanigad, Nicholas D. Evansa,b,1, David W. McComba,e, Alexandra E. Portera,2, and Molly M. Stevensa,b,f,2 Departments of aMaterials and fBioengineering, bInstitute of Biomedical Engineering, and dElectron Microscopy Centre, Division of

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Geochemistry of phosphorus and the behavior of apatite ...

The concentration of phosphorus in glassy melt inclusions and rehomogenized nanogranitoids suggests a strong control of melt aluminosity on apatite solubility in peraluminous granites, which is consistent with existing experimental studies.

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(PDF) Apatite weathering and the Phanerozoic phosphorus

The weathering of apatite, the primary phosphorus sink in Earth's exosphere, controls long-term phosphorus availability. If phosphorus is the ultimate controlling nutrient over geologic time ...

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Apatite: From Crystals to Phosphate Rock Rock Gem

2020-11-5  Apatite: From Crystals to Phosphate Rock. Phosphate rock, which consists largely of microcrystalline apatite-group minerals, is the basis of a multi-billion-dollar mining industry. (Wikimedia Commons) With their stubby, terminated, hexagonal prisms, glassy transparency, and soft, yellow-to-greenish-yellow or blue colors, apatite crystals are a ...

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Apatite as an interesting seed to remove phosphorus from ...

2005-5-1  In parallel, observation of the material by electron microscopy was used to give more precision information about the mechanisms involved. This work reveals the strong chemical affinity between apatites and phosphorus. Compared to other calcareous

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phosphorus (P) - David Darling

2021-9-19  Phosphorus (P) is a highly-reactive, poisonous, nonmetallic element (see nonmetal) that occurs naturally in phosphates, notably apatite (Ca 3 (PO 4) 2).It was discovered by Hennig Brand in Hamburg in 1669 (Fig 1). The name comes from the Greek phosphorus, meaning "bringer of light," because it glows in the dark.It is the eleventh most common element in the Earth's crust.

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Marine Polyphosphate: A Key Player in Geologic

Phosphorus is a vital macronutrient that profoundly influences global oceanic primary production on both modern and geologic time scales (1, 2).Over the past several decades, the residence time of phosphorus in the ocean has been repeatedly revised downwards as previously unidentified sedimentary sinks have been discovered (1, 3).Among these sinks are ubiquitous fine-grained authigenic apatite ...

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Understanding Phosphorus Forms and Their Cycling in

2019-4-19  phosphorus minerals include apatite, strengite, and variscite. The secondary phosphorus minerals include calcium (Ca), iron (Fe), and aluminum (Al) phosphates. The release of phosphorus from this pool is extremely slow and occurs when the mineral weathers and dissolves in soil water.

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Environmental impact of phosphate mining and

2018-6-28  Apatite is commonly very insoluble in its original state as extracted from the earth and is practically unavailable as a plant phosphorus source. 7 For this reason, drastic chemical processing

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Phosphorus Fertilizer: The Original and Commercial

2019-4-30  Earlier the original source of phosphorus (P) fertilizer was bones; as time passes, the supply of P fertilizer will get exhausted. Today, rock phosphate is the only raw material in the form of P fertilizers. There are two types of rock phosphates: igneous

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Phosphorus Fertilizer Production and Technology

2019-3-29  Phosphorus (P) Cycling in Crop Production Systems. Phosphorus is an essential element for all forms of life. Phosphorus in the earth’s crust is mostly contained in soils and sed\൩ments. Soils contain both organic and inorganic P containing compounds. Phosphorus reactions in

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