ويركزمعهد بحوثالعامة لليمينغ الصناعة الثقيلةفي مجال البحوث وتطوير التكنولوجيا المتقدمة والمنتجات الموجهة لصالح العملاء، فضلا عن بناءالقدرة التنافسية الجوهريةليجعل يمينغالصناعة الثقيلةرائدةفي هذه الصناعة.من خلال توفيرنتائج البحوثالأساسية، ويدعم المعهديمينغالصناعة الثقيلةالتكنولوجيا والمنتجات لتكون أعلىمنهافي العالمالقائمة.
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Apatite and phosphorus in mantle source regions: An ...
1980-12-1 Phosphorus concentration, apatite abundance, and residual apatite in the upper mantle Given knowledge of the average phosphorus con- tent of the mantle, it would be possible to place an upper limit on the average amount of apatite and thus evaluate its
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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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Geochemistry of phosphorus and the behavior of
2019-12-1 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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Solubilization of Phosphorus from Apatite by Sulfuric
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 the industrial acidification of apatite
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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
دردشة على الإنترنت Read More -
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The Significance of Apatite Inclusions in Soil Phosphorus ...
2018-7-12 inorganic phosphorus in a New Zealand chronosequence of soils developed on windblown sand, it was found that included apatite was the dominant form of phosphorus in the parent material and in many of the younger soils. The purpose of this paper is to examine some aspects of the significance of apatite inclusions in soil phosphorus studies. MATERIALS
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Phosphorus in 2D: Spatially resolved P speciation in
2020-10-15 Once apatite is dissolved, the released P is potentially bioavailable. However, the released orthophosphate (o -phosphate ions) may also be adsorbed by iron (Fe) and aluminium (Al) (hydr)oxides including allophane, which are ubiquitous weathering products in the B horizons of Spodosols (Gustafsson et al., 1999).
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Phosphate Rocks IntechOpen
2016-4-13 Apatite [Ca 5 (PO 4,CO 3) 3 (OH,F,Cl)] is the most abundant phosphate mineral, which accounts for more than 95% of all phosphorus in the Earth’s crust and is found as an accessory mineral in most rock types 1 A rock may be best defined as
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Phosphorus dynamics around the sulphate-methane
Phosphorus dynamics around the sulphate-methane transition in continental margin sediments: Authigenic apatite and Fe(II) phosphates C. Märza,⁎, N. Riedingerb, C. Senac,d, S. Kastene,f aSchool of Earth and Environment, University of Leeds, LS2 9JT Leeds, UK bBoone Pickens School of Geology, Oklahoma State University, Stillwater, OK, USA
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Phosphate Deposits - USGS
2010-8-9 P2O5.1 Most of the phosphorus in the earth's crust, however, occurs in species of the apatite group, Cai0 (P04,C03 )6 (F,Cl,OH)2 (Palache and others, 1951, p. 877; Altschuler and others, 1958; Deer and others, 1962, p. 324). The structure of apatite favors a wide variety of
دردشة على الإنترنت Read More -
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Solubilization of Phosphorus from Apatite by Sulfuric
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 the industrial acidification of apatite
دردشة على الإنترنت Read More -
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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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Apatite weathering and the Phanerozoic phosphorus
2000-7-1 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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Apatite Control of Phosphorus Release to Runoff from
2009-1-11 Phosphorus (P) in runoff can pose a water quality risk in phosphate mine reclamation areas. High dissolved P (DP) concentrations (about 0.4–3.0 mg L−1) in runoff from these areas and high equilibrium P concentrations for the soils led us to hypothesize that P release is controlled by dissolution of apatite rather than by desorption mechanisms.
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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
دردشة على الإنترنت Read More -
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Apatite: The mineral apatite information and pictures
Apatite is the main source of phosphorus. Phosphorus was previously extracted from crystalline Apatite, but nowadays is extracted from enormous deposits of Apatite-rich rock. Apatite is essential in the manufacture of phosphate fertilizers, and is very important in the chemical and pharmaceutical industries. Apatite is also a popular collectors ...
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Export of Total, Particulate, and Apatite Phosphorus
2018-1-1 Concentrations of apatite phosphorus (P) have been shown to be greater in the soils of agricultural and disturbed watersheds than in soils of forested watersheds. This observation suggests that
دردشة على الإنترنت Read More -
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Phosphate Deposits - USGS
2010-8-9 P2O5.1 Most of the phosphorus in the earth's crust, however, occurs in species of the apatite group, Cai0 (P04,C03 )6 (F,Cl,OH)2 (Palache and others, 1951, p. 877; Altschuler and others, 1958; Deer and others, 1962, p. 324). The structure of apatite favors a wide variety of
دردشة على الإنترنت Read More -
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Which Minerals Include Phosphate? - ThoughtCo
2019-2-13 Reimphoto / Getty Images Apatite (Ca 5 (PO 4) 3 F) is a key part of the phosphorus cycle. It is widespread but uncommon in igneous and metamorphic rocks. Apatite is a family of minerals centered around fluorapatite, or calcium phosphate with a bit of fluorine, with the formula Ca 5 (PO 4) 3 F. Other members of the apatite group have chlorine or hydroxyl that take the place of the fluorine ...
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Phosphate Rocks IntechOpen
2016-4-13 Apatite is the most abundant phosphate mineral which include more than 95% of al phosphorus in the Earth´s crust. The seventh chapter of this book provides brief description of sedimentary and igneous phosphate rocks and introduces basic ideas for characterization and classification of phosphate rocks. The chapter continues with description of biogenic apatites, description of phosphate rocks ...
دردشة على الإنترنت Read More -
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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.
دردشة على الإنترنت Read More -
-
Apatite: The mineral apatite information and pictures
Apatite is the main source of phosphorus. Phosphorus was previously extracted from crystalline Apatite, but nowadays is extracted from enormous deposits of Apatite-rich rock. Apatite is essential in the manufacture of phosphate fertilizers, and is very important in the chemical and pharmaceutical industries. Apatite is also a popular collectors ...
دردشة على الإنترنت Read More -
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The Significance of Apatite Inclusions in Soil Phosphorus ...
2018-7-12 of apatite, i.e., whether present as separate grains of apatite or as inclusions within other minerals. In a study of the amounts and distribution of the forms of inorganic phosphorus in a New Zealand chronosequence of soils developed on windblown sand, it was found that included apatite was the dominant form of phosphorus in the parent
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Apatite as an interesting seed to remove phosphorus
Apatite as an interesting seed to remove phosphorus from wastewater in constructed wetlands. Molle P(1), Liénard A, Grasmick A, Iwema A, Kabbabi A. Author information: (1)Cemagref, Research unit: Water Quality and Pollution Prevention, Lyon, France. [email protected]
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Export of Total, Particulate, and Apatite Phosphorus
2018-1-1 Concentrations of apatite phosphorus (P) have been shown to be greater in the soils of agricultural and disturbed watersheds than in soils of forested watersheds. This observation suggests that
دردشة على الإنترنت Read More -
-
Phosphate Deposits - USGS
2010-8-9 P2O5.1 Most of the phosphorus in the earth's crust, however, occurs in species of the apatite group, Cai0 (P04,C03 )6 (F,Cl,OH)2 (Palache and others, 1951, p. 877; Altschuler and others, 1958; Deer and others, 1962, p. 324). The structure of apatite favors a wide variety of
دردشة على الإنترنت Read More -
-
Phosphate Rocks IntechOpen
2016-4-13 Apatite is the most abundant phosphate mineral which include more than 95% of al phosphorus in the Earth´s crust. The seventh chapter of this book provides brief description of sedimentary and igneous phosphate rocks and introduces basic ideas for characterization and classification of phosphate rocks. The chapter continues with description of biogenic apatites, description of phosphate rocks ...
دردشة على الإنترنت Read More -
-
Which Minerals Include Phosphate? - ThoughtCo
2019-2-13 Reimphoto / Getty Images Apatite (Ca 5 (PO 4) 3 F) is a key part of the phosphorus cycle. It is widespread but uncommon in igneous and metamorphic rocks. Apatite is a family of minerals centered around fluorapatite, or calcium phosphate with a bit of fluorine, with the formula Ca 5 (PO 4) 3 F. Other members of the apatite group have chlorine or hydroxyl that take the place of the fluorine ...
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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 and sedimentary; both have the same phosphate mineral, i.e., calcium phosphate of apatite group.
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土壤和底泥中磷的形态分析 - usts.edu.cn
2013-10-13 (Non-Apatite Phosphorus，NAP)和有机磷(Organic Phosphorus，OP)，这种方法称 为W法[7]。但W法有一个缺点，用NaOH提取的磷组分可被沉积物中的钙盐重新 吸附，为了克服这一问题，Hieltjes和Lijklema提出以NH4Cl替代NaOH作为提取剂，
دردشة على الإنترنت Read More
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