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Showing 1 to 20 of 20 for “"phosphate rock"”.
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Reduction of Fluorine in Phosphate Rock
Phosphorus is widely distributed in the earth's crust, constituting about 0.13%. Like many other reactive elements, it is never found free in nature. Phosphorus is an essential constituent of both vegetable and animal matter; thus, it is important as a component of fertilizers and feed supplements.
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Evaluation of the Feasibility of Struvite Precipitation from Domestic Wastewater as an Alternative Phosphorus Fertilizer Resource
<p>Finite phosphate rock ore reserves are estimated to be exhausted in 100 to 150 years. Phosphate rock ore is the single global source material for phosphorus fertilizer production. Once these reserves are gone, agricultural production will be negatively impacted. There are currently no …
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ΣΥΜΒΟΛΗ ΣΤΟΝ ΕΜΠΛΟΥΤΙΣΜΟ ΤΟΥ ΜΗ ΕΞΑΛΛΟΙΩΜΕΝΟΥ ΦΩΣΦΟΡΙΤΗ ΗΠΕΙΡΟΥ
… OF BENEFICIATION OF THE UNALTERED LOW-GRADE PHOSPHATE ROCK OF EPIROUS (GREECE) WAS INVESTIGATED FOR ECONOMIC EXPLOITATION OF THE ROCK. THE MINERALOGICAL EXAMINATION OF THE ROCK AND THE PRELIMINARY TESTS FOR ITS BENEFICIATION (SIEVE ANALYSIS, HEAVY LIQUID TESTS) WERE PERFORMED. BASED ON THE …
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ΘΕΡΜΙΚΗ ΣΥΜΠΕΡΙΦΟΡΑ ΤΟΥ ΣΥΣΤΗΜΑΤΟΣ CAHP04.2H20-CA(H2P04)2.H20-SI02 ΚΑΙ ΟΞΙΝΟΘΕΡΜΙΚΗ ΕΠΕΞΕΡΓΑΣΙΑ ΤΩΝ ΦΤΩΧΩΝ ΦΩΣΦΟΡΙΤΩΝ (ΗΠΕΙΡΟΥ)
THE STUDY OF THE DRIMONA-EPIRUS PHOSPHATE ROCK PROVED THAT IT IS A POOR PHOSPHORITES WITH MAIN USEFUL ORE THE FLUORAPATITE AND MAIN IMPURITIES QUARTZ, WHICH CAN NOT BE BENEFICIATED SATISFACTORILY FOR FURTHER WET PROCESS TREATMENT. THE UTILIZATION OF THE PHOSPHATE ROCK FOR THE PRODUCTION OF …
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The separation and determination of rare earths in phosphate deposits from the north of the kingdom of Saudi Arabia
… for the separation of rare earth elements from phosphate rocks were investigated. The cation exchange method was found to be most suitable. Rare earth elements separated in this way were analysed by atomic emission using an inductively coupled plasma. Compromise optimum conditions were found and …
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Preservation and Deployment of Biofertilizers to Mitigate Soil Phosphorous Loss from Agricultural Systems
… in a form that plants can synthesize. The use of phosphate-rich fertilizers has compensated for the low levels of phosphorus in agricultural systems, however, up to 95% of these fertilizers become "fixed" in the soil, causing environmental damage and reducing soil fertility. It is critical to find …
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Crystallization of calcium sulphate during phosphoric acid production : improving filtration through improvement in particle shape and size distribution
The production of phosphoric acid from phosphate mineral rock involves the addition of phosphate rock to a concentrated sulfuric acid solution. The induced reactive crystallization process produces a side product of calcium sulfate hydrates, which become the filter media in the subsequent acid …
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Community Decision Making Aids for Improved Pasture Resources in the Madiama Commune of Mali
… was conducted using various P sources (Tilemsi phosphate rock (TPR), North Carolina phosphate rock (NCPR), Aluminum phosphate (AlP), Iron phosphate (FeP), and Triple superphosphate (TSP) and rates (0, 20, 40, 60, and 80 mg P kg-1 soil). Plants were grown for 10 wks, harvested and separated into …
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Managing environmental risks with flexibility : case of phosphate fertilizer industry in Morocco
… study inspired by OCP Group, the Moroccan major phosphate mining and fertilizer manufacturer. We examine the fluctuations of commodity markets, and the transformations led by environmental concerns. We recognize that environmental constraints can regionally change the systems of production, the …
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A comparison of the fluidized bed drying technique with conventional methods of drying tablet granulations
… particles (1). Fluidized bed drying of moist phosphate rock, coal, and many other materials has been discussed in technical literature (1, 2). However, relatively few reports have appeared on the applications of fluidized beds to materials of pharmaceutical interest.</p><p>These technical …
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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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Multidimensional population balance modeling and optimization of continuous reactive crystallization
… world. During the production of phosphoric acid, phosphate rock is reacted with sulfuric acid producing gypsum as the byproduct that is separated from the phosphoric acid by filtration. The efficiency of filtration depends strongly on the crystal size distribution (CSD) and shape. Undesired gypsum …
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Suitability of energy cropping on abandoned metal contaminated farmland.
… minerals (attapulgite, bentonite and zeolite), phosphate rock and lime. The surface soils at the site are contaminated with metals (predominantly copper and zinc). All soils used in the laboratory experiments were from the site at Fuyang and were collected from the plot which has a high …
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Growing an Enhanced Culture of Polyphosphate Accumulating Organisms using a University of Cape Town Membrane Bioreactor (UCTMBR) System
… given that P is sourced from a non-renewable phosphate rock. To cope with the increased demand and promote the sustainable use of P, researchers have been investigating methods to recover P from numerous waste streams, including municipal wastewater. Between the two main P removal technology …
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Phosphate Fertilizer Industry and Its Impact on the Environment
Made available in DSpace on 2017-07-06T18:48:20Z (GMT). No. of bitstreams: 3 Hamamo_Heba_E_MS.pdf: 62438320 bytes, checksum: 4aec99905f37d463bc176092e46864c8 (MD5) Hamamo_Heba_E_MS_ABS.pdf: 654970 bytes, checksum: f8f43955a79c14254f5b6b55a28d3fb1 (MD5) license.txt: 4813 bytes, checksum: …
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Manufacturing bio-bricks using microbial induced calcium carbonate precipitation and human urine
… demand for building materials and global natural phosphate rock (phosphorous) are increasing and decreasing respectively as urbanization increases. Naturally occurring phosphorous is expected to experience a peak in the near future after which it will be completely depleted. Urine has been …
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Concentrating human urine by evaporation
… fertilizer is also mined from non-renewable phosphate rock. Similarly, a large population size leads to the inevitable generation of waste effluents collectively known as wastewater. Currently, wastewater is transported to and treated in traditional wastewater treatment facilities to ensure …