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Beneficiation of apatite rock phosphates by calcination: …

TY - JOUR T1 - Beneficiation of apatite rock phosphates by calcination: effects on chemical properties and fertiliser effectiveness AU - Lim, H.H. AU - Gilkes, Robert PY - 2001 Y1 - 2001 N2 - Apatitic rock phosphates (RP) are commonly calcined to remove ...

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Phosphorous availability influences the dissolution of .

) is the primary inorganic source of phosphorus in the biosphere. Soil fungi are known to increase plant-available phosphorus by promoting dissolution of various phosphate minerals. Yet no apatite dissolution studies exist using fungi as weathering agents, and regulation of fungal weathering activity

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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 ...

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Apatite: Its uses as a mineral and gemstone

which apatite crystals subsequently form. However, despite their requisite function in building and decades of observations describing intracellular calcium phosphate, the precise role osteo-blasts play in mediating apatite formation remains largely

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APATITE: 3 MINERALS, ONE NAME

Apatite is the main source of phosphorus, and is an important constituent of phosphorite, a phosphate-rich sedimentary rock mined for its phosphorus content and used to make fertilizers, acids, and chemicals used in the chemical and pharmaceutical industries.

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Effect of mechanochemical activation of natural .

Besides the total phosphorus content (P 2 O 5 total), . Our results showed that the solubility of phosphorus from apatite ores in citric acid increased proportionately with the grinding time, and it nearly reached the maximum level (59.03%, 50 min) at 30 min (57.51%) and then gradually reached an equilibrium, under the condition of the .

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Apatite Mineral Data

Excalibur Mineral Corp. Google Search for Apatite Exceptional Minerals Google Search for Apatite John Betts Fine Minerals Search for Apatite McDougall Minerals Google Search for Apatite Mineral News Website Link Rock and Mineral Shows Google Search for Apatite Weinrich Minerals, Inc. Google Search for Apatite. Ask about Apatite here :

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The role of intracellular calcium phosphate in osteoblast .

Our observation here that calcium and phosphorus-containing vesicles also exist intracellularly is in keeping with recent obser-vations of intracellular, vesicle-enclosed calcium phosphate in de-veloping mouse (12), and suggests that an intracellular process may play a role in apatite .

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Apatite: The mineral apatite information and pictures

Apatite is the most common phosphate mineral, and is the main source of the phosphorus required by plants. The bones and teeth of most animals, including humans, are composed of calcium phosphate, which is the same material as Apatite. (These biological ...

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Apatite dissolution kinetics and the long-germ phosphorus .

Apatite is the primary exogenic sink of phosphorus (P). The weathering of apatite contained in continental rocks and sediments compensates for the P loss .

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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 .

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European Sustainable Phosphorus Platform

The selection of the apatite material and binder used to granulate apatite is critical in ensuring a good effluent quality (it needs to have high apatite purity (>90%), low metal and uranium content …

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Phosphorus - Oregon State University

Sources for lakes Phosphorus content of parent geology is highly variable Pollution from detergents is a major source of phosphorus Sodium pyrophosphates and polyphosphates are added to complex with cations and inactivate them to enhance cleaning action (related to hardness)

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Hydroxyapatite | Ca5HO13P3 - PubChem

Use of the information, documents and data from the ECHA website is subject to the terms and conditions of this Legal Notice, and subject to other binding limitations provided for under applicable law, the information, documents and data made available on the ECHA website may be reproduced, distributed and/or used, totally or in part, for non-commercial purposes provided that ECHA is .

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Phosphorus removal from wastewater by mineral apatite | …

Natural apatite has emerged as potentially effective for phosphorus (P) removal from wastewater. The retention capacity of apatite is attributed to a lower activation energy barrier ...

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The geochemistry of phosphorus in different granite suites …

Read "The geochemistry of phosphorus in different granite suites of the Western Carpathians, Slovakia: the role of apatite and P-bearing feldspar, Chemical Geology" on DeepDyve, the largest online rental service for scholarly research with thousands of academic

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The determination of total phosphorus in soils and parent materials

760 Determination of total phosphorus within primary minerals (Syers et al. 1967) and for the strongly weathered Okaihau and greywacke rock sequence 18 in. samples. Apatite inclusions were identified by optical microscopy in· hypersthene,

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Geochemistry of Uranium in Apatite and Phosphorite

Geochemistry of Uranium in Apatite and Phosphorite GEOLOGICAL SURVEY PROFESSIONAL PAPER D This report concerns work done on behalfGeochemistry of Uranium in Apatite and Phosphorite By Z. S. ALTSCHULER, R. S. CLARKE, JR., and E. J

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Apatite synonyms, apatite antonyms

Synonyms for apatite in Free Thesaurus. Antonyms for apatite. 11 words related to apatite: atomic number 15, P, phosphorus, atomic number 65, Tb, terbium, atomic number 69, thulium, Tm, mineral, fluorapatite. What are synonyms for apatite?

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phosphorus in apatite

Nearly all the phosphorus in terrestrial ecosystems is originally derived from the weathering of calcium phosphate minerals, especially apatite (Ca 5 (PO 4) 3 OH; Eq. 4.7). The phosphorus content of most rocks is not large, and in most soils only a small fraction of .

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(PDF) Mineral Sources of Calcium and Phosphorus in Soils .

Apatite is the primary source of P and,. | Find, read and cite all the research you need on ResearchGate . Mineral Sources of Calcium and Phosphorus in Soils of .

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Synthetic apatite nanoparticles as a phosphorus fertilizer …

Synthetic apatite nanoparticles as a phosphorus fertilizer for soybean (<i>Glycine max</i>) Skip to main content Thank you for visiting nature.com.

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Phosphate Deposits - USGS

Apatite is the principal primary mineral, but a number of others are common in deposits formed during weathering of phosphate *In the trade the phosphate content of phosphate rock and fertilizer is commonly re­ ported as Ca3(PO4 >2, known as phosphate of lime (B.P.L.). To convert PjOs to

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(PDF) The Use of Phosphorus Contents in Yielding Estimates .

Phosphorus contents in cumulus rocks occurring close to the level of apatite appearance in the basic rocks of the Bushveld Complex, South Africa, provide a method of calculating the proportion of .

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Phosphorus Fertilizer Production and Technology

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.

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Phosphorus removal by the use of apatite in constructed …

Phosphorus (P) removal in constructed wetlands (CWs) has received particular attention during the last decades by using specific materials which promote P adsorption/precipitation phenomena. Recent studies have shown an interest in using apatite materials to ...

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Sequential Bioleaching of Phosphorus and Uranium

A vast majority of phosphate rock ores are apatite minerals from which the phosphorus is usually extracted by a wet process [4,7,8]. In this process, apatite is treated with sulfuric acid, resulting in the dissolution of solid mineral phosphorus to soluble phosphoric acid. Simultaneously,

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Apatite Mineral Data

Apatite Apatite-(CaF) Beryl Muscovite Comments: Pink crystals of fluorapatite with pale blue beryl (aquamarine) on books of muscovite crystals. Location: Nagar …

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Journal of Environmental Quality Abstract

Journal of Environmental Quality Abstract - Surface Water Quality Export of Total, Particulate, and Apatite Phosphorus from Forested and Agricultural Watersheds View My Binders This article in JEQ Vol. 47 No. 1, p. 112 Received: J Accepted ...

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Remediation of copper contaminated soil by using different .

Jul 26, 2016 · Remediation of copper contaminated soil by using different particle sizes of apatite: a field experiment. . Soil pH, organic matter content and available phosphorus contents were analyzed based on the method given by Lu . The soil pH were measured in suspension with the carbon dioxide-free distilled water to soil ratio of 2.5 (V/W) by pH .

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Phosphate Deposits

Apatite is slowly soluble in neutral or alkaline waters, and its solubility increases with increasing acidity. It may survive rock weathering to form a phosphate-rich residuum, but it breaks down under prolonged exposure. The PCX content of

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Removal of phosphorus from iron ores by chemical …

The results show that phosphorus occurring as apatite phase could be removed by alkali-leaching, but those occurring in the iron phase could not. Sulfuric acid is the most effective among the three kinds of acid. 91.61% phosphorus removal was attained with 1%

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CiteSeerX — The use of phosphorus contents in yielding .

CiteSeerX - Document Details (Isaac Councill, Lee Giles, Pradeep Teregowda): Phosphorus contents in cumulus rocks occurring close to the level of apatite appearance in the basic rocks of the Bushveld Complex, South Africa, provide a method of calculating the proportion of intercumulus component in these rocks. Previous experimental studies have accurately constrained the phosphorus content of .

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Apatite / hexagonal phosphates / video

Apatite is a generic name for hexagonal phosphates of varying composition, Ca5 (PO4) 3 (OH, Cl, F). Three species are recognized by the IMA, named according to the prevalent anion: Chlorapatite, Fluorapatite, Hydroxyapatite. Two monoclinic variants previously recognized as species are now recognized as polytypes.

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Unlocking Rare Earth Elements From European Apatite-Iron Ores

gangue mineral, which contributes to high phosphorus content of the ores. Many apatite iron ores contain 1 to 5 % P on average and apatite has been produced as a by‐ product at Malmberget during the First and Second World War but also in 1952‐1953.

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Apatite weathering and the Phanerozoic phosphorus …

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

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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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Microbial sequestration of phosphorus in anoxic upwelling .

Jul 18, 2010 · Phosphorus is removed from the ocean by sedimentation of organic matter, and the subsequent conversion of organic phosphorus to phosphate minerals such as apatite.

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Apatite

Apatite mineral Britannica Apatite, any member of a series of phosphate minerals, the world’s major source of phosphorus, found as variously coloured glassy crystals, masses, or nodules. If not for its softness (Mohs hardness 5, compared with the 7 to 9 of most

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Geochemistry of Uranium in Apatite and Phosphorite

THE GEOCHEMISTRY OF URANIUM IN APATITE AND PHOSPHORITE By Z. S. ALTSCHULEK, K. S. CLAKKE, JR., and E. J. YOUNG ABSTRACT Apatite contains only traces of uranium, yet as apatite is a minor constituent in most rocks and the major constituent of a few very large deposits, it accounts, paradoxically, for both

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APATITE (Calcium (Fluoro-, Chloro-, Hydroxyl-) Phosphate)

Apatite is actually three different minerals depending on the predominance of either fluorine, chlorine or the hydroxyl group. These ions can freely substitute in the crystal lattice and all three are usually present in every specimen although some specimens have been close to 100% in one or the other.

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Long-term effect of apatite on ectomycorrhizal growth and .

Mar 27, 2012 · Ectomycorrhizal (ECM) fungi are efficient at taking up phosphorus (P) from mineral sources, such as apatite, which are not easily available to the host trees. Since ECM fungal species differ in P uptake rates, it can be expected that the composition of the ECM fungal community will change upon exposure to apatite, provided that the P transfer is rewarded by more carbon being transferred to the .

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World Phosphate Rock Reserves and Resources

IFDC Rosemarin 2004 Rosemarin et al. 2009 Cordell, Dragert and White 2009 de Haes et al. 2009 Vaccari 2009 Institute of Ecology 1971 Phosphate rock reserves exhausted in 90-130 years Numerous articles have suggested phosphorus (phosphate rock) reserves — resources will be

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Apatite Mineral | Physical - Optical Properties .

As a mineral, apatite is chiefly used as a phosphorus source for the manufacture of fertilizers. One of the primary physical properties of apatite is that, in its mineral form, apatite is very stable and does not easily dissolve in a natural environment.

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Apatite Facts

Apatite is the name of a group of phosphate minerals that have a familiar chemical composition and share the same physical properties. They are a significant component of phosphorite and used to make chemicals, acids, and fertilizers. Apatite has a consistent hardness and serves as the index mineral for a hardness of 5 in the Mohs Hardness Scale.

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Apatite - an overview | ScienceDirect Topics

Apatite (Ca 10 (PO 4) 6 (OH,F,Cl) 2) is the most common mineral for phosphates production, particularly for fertilizers and phosphoric acid.Apatite can be igneous or sedimentary. Almost all apatite ores contain rare earth elements, but igneous apatite has a higher concentration than sedimentary apatite.

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Understanding phosphorus fertilizers | UMN Extension

 · When producers pay special attention to managing phosphorus (P), it can lead to profitable crop production. The best way to use fertilizers to meet P requirements changes with crop, soil properties and environmental conditions. Inorganic commercial P fertilizers have evolved over the last several ...

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Apatite synonyms, apatite antonyms - FreeThesaurus

Synonyms for apatite in Free Thesaurus. Antonyms for apatite. 11 words related to apatite: atomic number 15, P, phosphorus, atomic number 65, Tb, terbium, atomic number 69, thulium, Tm, mineral, fluorapatite. What are synonyms for apatite?

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(PDF) Mineral Sources of Calcium and Phosphorus in Soils .

Apatite is the primary source of P and,. | Find, read and cite all the research you need on ResearchGate . Mineral Sources of Calcium and Phosphorus in Soils of the Northeastern United States.

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Geochemistry of phosphorus and the behavior of apatite .

Dec 01, 2019 · 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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Phosphorus Fertilizer: The Original and Commercial …

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 ...

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Apatite / hexagonal phosphates / video

Apatite is a generic name for hexagonal phosphates of varying composition, Ca5 (PO4) 3 (OH, Cl, F). Three species are recognized by the IMA, named according to the prevalent anion: Chlorapatite, Fluorapatite, Hydroxyapatite. Two monoclinic variants previously

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Processes for phosphorus removal from iron ore - a review

Iron ore of high phosphorus content coexists with other minerals in the form of apatite or fluorapatite. Phosphorus is spread on the edge of mineral particles of iron oxide and embedded in quartz or carbonate minerals and a small amount is present in the iron mineral grid (Xia et al., 2011).

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(PDF) Mineral Sources of Calcium and Phosphorus in Soils …

and sedimentary rocks, although usually in trace amounts. Apatite is the primary source ... Mineral Sources of Calcium and Phosphorus in Soils of the Northeastern United States Apatite is ...

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phosphorous ntent of apatite

phosphorous content of apatite - ellul.nl phosphorous content of apatite - marcopowerin The only common mineral of phosphorus is apatite, Ca, Iron ore of high phosphorus content,, Know More phosphorous . Get Price phosphorous content of apatite – Grinding Mill ...

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Phosphorus Fertilizer Production and Technology

• Today most P fertilizer production is based on acidification of apatite. from phosphate rock (PR) Guano mining, Chincha Islands, Peru, 1860 Guano mining, Chincha Islands, Peru 1860 U.S. phosphate operation, late 1800s. The chemical symbol for the element phosphorus is P. The fertilizer industry often uses the more generic term phosphate.

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Unlocking Rare Earth Elements From European Apatite .

gangue mineral, which contributes to high phosphorus content of the ores. Many apatite iron ores contain 1 to 5 % P on average and apatite has been produced as a by‐ product at Malmberget during the First and Second World War but also in 1952‐1953.

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Processes for phosphorus removal from iron ore

Iron ore of high phosphorus content coexists with other minerals in the form of apatite or fluorapatite. Phosphorus is spread on the edge of mineral particles of iron oxide and embedded in quartz or carbonate minerals and a small amount is present in the ironXia ).

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Utilization of Apatite Ores | IntechOpen

Phosphate rock is an important mineral commodity used in the chemical industry and production of food. The first section of ninth chapter of this book introduces utilization of apatite ores for manufacturing of phosphorus. The second part deals with production of phosphoric acid via wet and thermal process and utilization of byproducts such as phosphogypsum, phosphorous slag and .

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Phosphorus - Nutrient Management | Mosaic Crop Nutrition

Organic phosphorus is found in plant residues, manures and microbial tissues. Soils low in organic matter may contain only 3% of their total phosphorus in the organic form, but high-organic-matter soils may contain 50% or more of their total phosphorus content in the organic form. Inorganic Phosphorus

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Apatites - definition of Apatites by The Free Dictionary

Apatites synonyms, Apatites pronunciation, Apatites translation, English dictionary definition of Apatites. . chlorine, or hydroxyl. These compounds form hexagonal crystals and are components of bones and teeth, are a source of phosphorus for plants, and are used in the manufacture of fertilizers. . transparent mineral consisting mainly of .

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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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Phosphorus removal from wastewater by mineral apatite

Natural apatite has emerged as potentially effective for phosphorus (P) removal from wastewater. The retention capacity of apatite is attributed to a lower activation energy barrier required to form hydroxyapatite (HAP) by crystallization. The aim of our study was to ...

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phosphorus | Definition, Uses, & Facts | Britannica

About 550 different minerals have been found to contain phosphorus, but, of these, the principal source of phosphorus is the apatite series in which calcium ions exist along with phosphate ions and variable amounts of fluoride, chloride, or hydroxide ions, according to the formula [Ca 10 (PO 4) .

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Apatite: Its uses as a mineral and gemstone

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Evaluation of the Acid Baking Technique to Decrease the .

of apatite and aluminosilicate compounds was observed. The chemical analysis was carried out by inductively coupled plasma optical emission spectrometry (ICP-OES) method performed at CETEM. The phosphorus content in the ore sample was 346 mg.kg-1, corresponding to 0.0346%. The iron ore with this amount of phosphorus would be treated as

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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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