leterature of phosphate rock

leterature of phosphate rock

  • Rock Phosphate Fertilizer - Garden Myths

    What Is Rock Phosphate?Is It An Organic Fertilizer?Is It Good For Plants?Phosphorus ChemistryRock phosphate is a mined rock that contains limestone and clay as well as a high concentration of phosphorus (P). The actual composition varies depending on it’s source but it usually contains 16 to 20% P.
  • Reserves and Resources DC World Phosphate Rock

    of phosphate rock mining and processing has occurred at numerous sites around the world over the past few decades. Vertical integration of phosphate rock mining and processing may be a necessary component to compete in the world phosphate fertilizer market when new deposits are developed.

  • Phosphorite - Wikipedia

    Phosphorite, phosphate rock or rock phosphate is a non-detrital sedimentary rock which contains high amounts of phosphate minerals. The phosphate content of phosphorite (or grade of phosphate rock) varies greatly, from 4% to 20% phosphorus pentoxide (P 2 O 5).

  • Phosphate - Wikipedia

    The phosphate ion is a polyatomic ion with the empirical formula (PO 4) 3− and a molar mass of 94.97 g/mol. It consists of one central phosphorus atom surrounded by four oxygen atoms in a tetrahedral arrangement. The phosphate ion carries a −3 formal charge and is the conjugate base of the hydrogen phosphate ion, H(PO 4) 2−, which is the conjugate base of H

  • Beilstein Reference: 3903772
  • phosphorite Definition, Formation, Uses Britannica

    Phosphorite, also called phosphate rock, rock with a high concentration of phosphates in nodular or compact masses. The phosphates may be derived from a variety of sources, including marine invertebrates that secrete shells of calcium phosphate, and the bones and excrement of vertebrates.

  • Recent revisions of phosphate rock reserves and resources ...

    492 J. D. Edixhoven et al.: Recent revisions of phosphate rock reserves and resources 1 Introduction Phosphorus (P) is a nutrient essential to the growth of all plants and animals; agriculture depends on it to maintain food production at required levels. Phosphate rock (PR), the major source of phosphate for fertilizer production, is a finite,

  • Cited by: 64
  • The Composition and Distribution of Phosphate Rock with ...

    Although phosphate rock is valued primarily for its content of phosphoric acid, the commercial desirability of a particular grade or type of rock may be affected to a certain extent by the presence of admixed impurities such as silica, carbonates, aluminum, iron, etc. Phosphate rock containing more than about 5 to 6 percent of total

  • Authors: K D Jacob W L Hill H L Marshall D S ReynoldsAbout: Public economics
  • Di-calcium phosphate by direct acidulation of phosphate

    di-calcium phosphate by direct acidulation of phosphate rock. In general, when phosphate rock is treated with sulfuric acid, mono-calcium phosphate or phosphoric acid is formed. If less sulfuric acid is used, di-calcium phosphate should be formed theoretically, however only mono-calcium phosphate and undecomposed phos­ phate rock result in ...

  • Authors: Kuo Kang FengAffiliation: Iowa State UniversityAbout: Calcium
  • (PDF) ROCK PHOSPHATE: ITS AVAILABILITY AND SOLUBILIZATION ...

    A high grade quality rock phosphate is an essential requirement for manufacturing of phosphatic fertilizers. In India, 15.3 mt of indigenous deposits of high grade rock phosphate could meet hardly ...

  • Comparative Study Of Rock Phosphate And Calcium

    favorable than tri-calcium phosphate for the mustard growth. Physiochemical effect of the plant was evaluated through the analysis of amino acid, pigment, shoot root biomass content of the plant. The following parameters of soil (treated with Tri calcium phosphate Rock phosphate) such as pH, EC, moisture, ash were analyzed.

  • Published in: IOSR Journal of Environmental Science, Toxicology and Food Technology 2014Authors: Sandhya Buddh
  • Recent revisions of phosphate rock reserves and resources ...

    492 J. D. Edixhoven et al.: Recent revisions of phosphate rock reserves and resources 1 Introduction Phosphorus (P) is a nutrient essential to the growth of all plants and animals; agriculture depends on it to maintain food production at required levels. Phosphate rock (PR), the major source of phosphate for fertilizer production, is a finite,

  • Apatite Ca5FO12P3 - PubChem

    Phosphate rock minerals are the only significant global resources of phosphorus. The United States is the world's leading producer and consumer of phosphate rock, which is used to manufacture phosphate fertilizers and industrial products.

  • Phosphate rock formation and marine phosphorus ...

    Phosphate rocks, also referred to as phosphorites, are sedimentary deposits with high phosphorus (P) concentrations. These rocks are one of the primary ore sources for P (), which in turn is a critical and non-renewable element for fertilizer production, upon which global fertility depends.The startling limitation of phosphate rock reserves has led to a renewed intensity of research in ...

  • Use of phosphate rocks for sustainable agriculture

    In 1998, the consumption of direct application phosphate rock (DAPR) represented less than 2 percent of world P 2 O 5 consumption (Maene, 2003). The information available in literature on the legislation for phosphate rock (PR) as a fertilizer for direct application is similarly limited.

  • Recent revisions of phosphate rock reserves and resources

    Recent revisions of phosphate rock reserves and resources: reassuring or misleading? An in-depth literature review of global estimates of phosphate rock reserves and resources J. D. Edixhoven1, J. Gupta2, and H. H. G. Savenije1 1Department of Geography, Planology and International Development Studies, Amsterdam

  • Environmental impact of phosphate mining and beneficiation ...

    about phosphate rock basics, mining and beneficiation, the association of toxic metals and radioactive elements in the phosphate rocks and the transfer pathways of these hazardous elements from the phosphate rocks to the environment. The discussion part was mainly concerned on the environmental impact of phosphate mining and processing

  • Phosphate rock margins squeezed as tighter EU regulation ...

    Oct 11, 2017  As overcapacity in the phosphate rock market drags prices lower and pressures producer margins, impending regulatory changes in the EU could shift industry dynamics, cost structure and trade flows. In the recently published 2017 edition of CRU’s Phosphate Rock Cost Service, our analysis shows that lower prices have squeezed margins ...

  • Arsenic in Natural Phosphates and Phosphate Fertilizers

    made, and, so far as the authors know, only two samples of phosphate rock have been examined for mercury, both with negative results (73). Likewise, spectrochemical analyses showed no germanium in Florida land pebble, Tennessee brown rock, and Maxville, Mont., phosphates (73, 106). The authors' experiments indicated little or no inter-

  • Phosphoric acid - Essential Chemical Industry

    Phosphoric acid is produced from fluorapatite, known as phosphate rock, 3Ca 3 (PO 4) 2.CaF 2, by the addition of concentrated (93%) sulfuric acid in a series of well-stirred reactors. This results in phosphoric acid and calcium sulfate (gypsum) plus other insoluble impurities.

  • What is phosphorus rock? - Answers

    Phosphorite, phosphate rock or rock phosphate is a non-detrital sedimentary rock which contains high amounts of phosphate bearing minerals. See attached link for more information.

  • ISOLATION AND CHARACTERIZATION OF PHOSPHATE ROCK ...

    isolation and characterization of phosphate rock-solubilizing microorganisms from soils and rock phosphate samples of panda hill and minjingu, tanzania ester jimmy simfukwe a dissertation submitted in partial fulfilment of requirements for the degree of master of science in soil science and land management of the sokoine university of agriculture.

  • Review of Literature - INFLIBNET

    Review of Literature In recent years, attention has been paid to the microbial products, which have significant agricultural value. Microorganisms produce secondary metabolites and some of which have phosphate solubilizing capabilities. Some of the microorganisms are isolated from the soil and their phosphate

  • (PDF) Phosphate deposits of the World. Volume 2: Phosphate ...

    PDF On Jan 1, 1990, Yehoshua Kolodny and others published Phosphate deposits of the World. Volume 2: Phosphate rock resources : edited by A. J. G. Notholt, R. P ...

  • Environmental Aspects of Phosphate and Potash Mining

    Environmental Aspects of Phosphate and Potash Mining ... 1.1 The Mining of Phosphate Rock and Potash and the Environment 1 ... addition to a review of available literature. The com-panies and organizations involved in the project are listed in Appendix B. While this does not provide a

  • The Composition and Distribution of Phosphate Rock with ...

    Although phosphate rock is valued primarily for its content of phosphoric acid, the commercial desirability of a particular grade or type of rock may be affected to a certain extent by the presence of admixed impurities such as silica, carbonates, aluminum, iron, etc. Phosphate rock containing more than about 5 to 6 percent of total

  • Authors: K D Jacob W L Hill H L Marshall D S ReynoldsAbout: Public economics
  • (PDF) ROCK PHOSPHATE: ITS AVAILABILITY AND SOLUBILIZATION ...

    A high grade quality rock phosphate is an essential requirement for manufacturing of phosphatic fertilizers. In India, 15.3 mt of indigenous deposits of high grade rock phosphate could meet hardly ...

  • Di-calcium phosphate by direct acidulation of phosphate

    di-calcium phosphate by direct acidulation of phosphate rock. In general, when phosphate rock is treated with sulfuric acid, mono-calcium phosphate or phosphoric acid is formed. If less sulfuric acid is used, di-calcium phosphate should be formed theoretically, however only mono-calcium phosphate and undecomposed phos­ phate rock result in ...

  • Authors: Kuo Kang FengAffiliation: Iowa State UniversityAbout: Calcium
  • What is phosphorus rock? - Answers

    Phosphorite, phosphate rock or rock phosphate is a non-detrital sedimentary rock which contains high amounts of phosphate bearing minerals. See attached link for more information.

  • Phosphate rock formation and marine phosphorus ...

    Phosphate rocks, also referred to as phosphorites, are sedimentary deposits with high phosphorus (P) concentrations. These rocks are one of the primary ore sources for P (), which in turn is a critical and non-renewable element for fertilizer production, upon which global fertility depends.The startling limitation of phosphate rock reserves has led to a renewed intensity of research in ...

  • World Reserves of Phosphate Rock - Dynamic, Unfolding ...

    The effort included a review of publicly available information, such as government and industry reports and statistics, scientific literature, proceedings publications, conference presentations, etc. The review was published by IFDC as World Phosphate Rock Reserves and Resources (Van Kauwenbergh, 2010).

  • Uranium Recovery from Phosphates

    Apr 15, 2019  A more cautious figure of up to 3700 t U/a for the theoretically possible uranium recovery from phosphates is presented in [IAEA 2001]. This total assumes annual production of phosphate rock of 142 million tonnes per year yielding 66 million tonnes of concentrate.

  • Use of phosphate rocks for sustainable agriculture

    In 1998, the consumption of direct application phosphate rock (DAPR) represented less than 2 percent of world P 2 O 5 consumption (Maene, 2003). The information available in literature on the legislation for phosphate rock (PR) as a fertilizer for direct application is similarly limited.

  • Apatite Ca5FO12P3 - PubChem

    Phosphate rock minerals are the only significant global resources of phosphorus. The United States is the world's leading producer and consumer of phosphate rock, which is used to manufacture phosphate fertilizers and industrial products.

  • Improving rock phosphate availability through feeding ...

    Improving rock phosphate availability through feeding, mixing and processing with composting manure ... Literature review. Biol. Agric. Hortic., 10 (1993), pp. 65-85. Google Scholar. ... C.H. Van den BergheThe effect of Matongo rock phosphate and urea as compared to di-ammonium phosphate in the composting process and the yield of potatoes in ...

  • ISOLATION AND CHARACTERIZATION OF PHOSPHATE ROCK ...

    isolation and characterization of phosphate rock-solubilizing microorganisms from soils and rock phosphate samples of panda hill and minjingu, tanzania ester jimmy simfukwe a dissertation submitted in partial fulfilment of requirements for the degree of master of science in soil science and land management of the sokoine university of agriculture.

  • Review of Literature - INFLIBNET

    Review of Literature In recent years, attention has been paid to the microbial products, which have significant agricultural value. Microorganisms produce secondary metabolites and some of which have phosphate solubilizing capabilities. Some of the microorganisms are isolated from the soil and their phosphate

  • Environmental Aspects of Phosphate and Potash Mining

    Environmental Aspects of Phosphate and Potash Mining ... 1.1 The Mining of Phosphate Rock and Potash and the Environment 1 ... addition to a review of available literature. The com-panies and organizations involved in the project are listed in Appendix B. While this does not provide a

  • World Reserves of Phosphate Rock - Dynamic, Unfolding ...

    The effort included a review of publicly available information, such as government and industry reports and statistics, scientific literature, proceedings publications, conference presentations, etc. The review was published by IFDC as World Phosphate Rock Reserves and Resources (Van Kauwenbergh, 2010).

  • Phosphates - definition of Phosphates by The Free Dictionary

    This dried material they would then grind to a fine powder, and after they had mixed it up well with a mysterious but inoffensive brown rock which they brought in and ground up by the hundreds of carloads for that purpose, the substance was ready to be put into bags and sent out to the world as any one of a hundred different brands of standard bone phosphate.

  • (PDF) Radiological, chemical and morphological ...

    The phosphate rock is, due to its origin, affected by high concentrations of impurities, heavy A by-product of the reaction is calcium sulfate dihydrate metals, naturally occurring radionuclides and other so-called trace (CaSO4 2H2 O), which is called phosphogypsum.

  • Recent revisions of phosphate rock reserves and resources ...

    Phosphate rock (PR) is a finite mineral indispensible for fertilizer production and a major pollutant. High grade PR is obtained from deposits which took millions of years to form and are gradually being depleted.

  • Characteristics of phosphate rock materials and their ...

    Dissolution of phosphate rock (PR) materials in soil is a primary concern for phosphorus (P) in the PR to become plant available. The dissolution of three PR materials, China PR (CPR), Ciamis PR (CiamisPR) and Gafsa PR (GPR), in eight acid Indonesian soils was evaluated in a closed incubation system ...

  • The Potential of Minjingu Phosphate Rock for Water ...

    Jan 01, 2016  In some parts of Tanzania, fluoride ion concentrations in potable water are higher than recommended by WHO. Consequently, searches for economically and technically viable strategies are required to address this problem. This work aims to determine the potential of phosphate rock mined from Minjingu area in Northern Tanzania as water de-fluoridatant.

  • Published in: International Journal of Science, Technology and Society 2016Authors: Francisco Lucas Olambo Joseph Yoeza Naimani Philip James E G MdoeAffiliation: University of Dar Es SalaamAbout: Tanzania
  • Isolation of Phosphate Solubilizing Bacteria from Maize ...

    ABSTRACTPhosphate solubilizing bacteria (PSB) play a significant role in plant P nutrition by their effect on soil P dynamics and their subsequent ability to make P available to plants via solubilization and mineralization processes. This study aimed to evaluate the effect of separate and combined use of indigenous PSB, poultry manure (PM) and compost on solubilization and mineralization of ...

  • Flotation of Egyptian Newly Discovered Fine Phosphate Ore ...

    production of phosphate fertilizers and other chemicals (Fang and Jun, 2011). About 191Mt of phosphate were produced in 2011and the USGS predicts that worldwide phosphate production will be increased to 228Mt by 2015. High percentage of phosphate rock (~ 95%) is consumed in manufacturing of fertilizers and animal feed supplements.

  • Uranium Recovery from Phosphates

    Apr 15, 2019  A more cautious figure of up to 3700 t U/a for the theoretically possible uranium recovery from phosphates is presented in [IAEA 2001]. This total assumes annual production of phosphate rock of 142 million tonnes per year yielding 66 million tonnes of concentrate.

  • Dissolution of Phosphate Rock by Mixtures of Sulfuric and ...

    The process involves dissolution of phosphate rock in an aqueous mixture of phosphoric and sulfuric acid and subsequent crystallization of calcium sulfate dihydrate from the product phosphoric acid solution. In this study the mechanisms of dissolution of phosphate rock

  • Use of phosphate rocks for sustainable agriculture

    However, much less information is available on other effects associated with PR use, i.e. secondary nutrients, micronutrients, liming effect, and hazardous elements. This chapter presents a review of the information available in literature that is relevant to these other effects. Secondary nutrients in phosphate rock