It is widely believed that the radioactivity associated with phosphate rocks of sedimentary origin Table 1 Mean values of radiation activity concentration of 226Ra, 232Th and 40K (Bq Kg 1) of phosphate and shale rocks in El-Mahamid and Wadi El-Mashash areas, Egypt Type of rock Dakhla shale Quseir shale Um Tandeya phosphate Bora …
Figure 1. Accumulated Soil P-balances from annual and one-time applications of rock phosphate fertilizer. Treatments are an annual application of rock phosphate (RP) fertilizer at 35 kg P/ha, a single application of RP at 175 kg P/ha, and a treatment receiving only equivalent nitrogen (N) and potassium (K) applications as the …
Using gamma spectrometry, the activity concentrations of natural radionuclides (226 Ra, 232 Th and 40 K) were measured in phosphate rock samples collected from phosphate mines located in El-Sibaiya (Nile valley) and Red Sea coast, Egypt.The average activity concentrations of 226 Ra, 232 Th and 40 K (Bqkg −1) in …
Phosphate rock is a general term used to describe natural mineral assemblages of variable composition that have a high concentration of phosphate minerals. Most of the minerals in phosphate rock belong to the apatite group.
Arab J Geosci (2016) 9:670 DOI 10.1007/s12517-016-2698-x ORIGINAL PAPER An overview of phosphate rocks and their mining impact on groundwater, Eastern Desert, Egypt Mohamed Yousif 1 & Ondra Sracek 2 Received: 20 July 2015 / Accepted: 26 September 2016 # Saudi Society for Geosciences 2016 Abstract The Eastern Desert of …
The average concentration of 238 U in the analyzed samples is 1766 ... The phosphate ore deposits of Egypt represent a part of the Mediterranean Phosphate Province, which extends from Morocco to Turkey. ... Selenium and other trace elements in phosphate rock of Bayovar–Sechura (Peru) J. Geochem. Explor., 107 (2) (2009), pp. …
Groundwater vulnerability Mapping of Jordanian phosphate mining area based on Phosphate concentration and GIS: Al-Abiad mine as a case study. ... possibly in excess of 70 billion metric tons (Cook and McElhinny 1979). The phosphate resources in Egypt exceed 3 billion metric tons (Notholt 1985), and their discovery dates back to the end of …
The REE-bearing phosphate rocks in Egypt also contain elevated ... The average activity concentration for the Sibaiya phosphate samples under study is 152.5, 947, and 33.2 Bq/kg against the ...
rock phosphate is a clay material that is surface mined from the old settling basins of former hard phosphate rock mines in Egypt. Our rock phosphate contains about 20 32 % of P205 as well as a percentage of lime and other trace minerals. It is a very fine material, but can be applied with all common fertilizer spreaders. soft rock phosphate is ...
Dolomitic phosphates represented the main carbonate phosphate rocks of the Upper Member of Duwi Formation, at Um Queih Mine, South-Western Quseir, that …
Cadmium concentration in phosphate rock varied from 3-150 mg/kg with average concentration of 18 mg/kg, while uranium concentration in phosphate rock is ranging from 20 to 500 mg/kg with average ...
TAS Flowrance specialize in a diverse range of fertilizer and mining materials, including phosphate derivatives (Phosphate Rock, phosphate granular, phosphate powder), silica sand, quartz rock, talc lump, talc …
The most important factors control the mineral composition of the phosphate rocks is type and source. They are classified into four groups. They are sedimentary marine origin (75%), igneous origin (15–20%), metamorphic and weathered origin (8%), and 2–3% as biogenic sources (Ozer et al. 2000).Silica, clayey and …
In the present work, a process for the treatment of Abu Tartur phosphate rock for the recovery of lanthanides without interfering with the normal route proposed for fertilizer production, is proposed using HNO 3 as a leaching agent. Further, an attempt was made to defluorinate the leach solution in order to upgrade the fertilizer and, at the same …
DOI: 10.1016/S0892-6875(00)00064-9 Corpus ID: 96918304; Evaluation of flotation strategies for sedimentary phosphates with siliceous and carbonates gangues @article{AbdelKhalek2000EvaluationOF, title={Evaluation of flotation strategies for sedimentary phosphates with siliceous and carbonates gangues}, author={Nagui A. …
Sample preparation. The used phosphoric acid has been produced in Phosphate Fertilizers and Chemicals Company, Egypt, using the Di-hydrate wet process throughout four main phases: a) milling, b) reaction, c) filtration and d) concentration [].In the first stage, El-Sebeaya phosphate rock is milled by a ball mill to the required mesh …
Phosphate rocks are a vital resource for world food supply and security. They are the primary raw material for phosphoric acid and fertilizers used in agriculture, and are increasingly considered to be a …
Effect of different parameters on REEs leaching efficiency from Abu Tartur phosphate rock with a particle size of 150 µm. a reaction time: 5 mL/g; 100 rpm; 15 wt.-% P 2 O 5 ; 25 °C. b phosphoric ...
Gravity separation technique has been adopted to upgrade the Egyptian low-grade phosphate ore (22.71%) from East Siba'eya area as an alternative method to the existing calcination method, which...
Phosphate rock or pre-concentrated phosphate ore is an important raw material for the Egyptian economy with Egypt being the eighth largest phosphate rock producer in the world in 2020 . Three main phosphate ore mining zones can be differentiated in Egypt: (1) the area …
Phosphate and environmental samples were collected from Abu Tartor phosphate mine and the surrounding region. The activity concentration of 226Ra (238U) series, 232Th series and 40K were measured ...
In phosphate rocks of sedimentary origin, the concentration of 238 U activity is in the range of 200-2500 Bq kg −1, while in phosphate rocks of magmatic origin it is in the range of 30-180 Bq ...
The Nile Valley is a main area for Egyptian phosphorites. The studied samples from the eastern and western sides of the Nile Valley showed similarities in their characteristics, suggesting one depositional basin, but they varied in their uranium content, with averages recorded at 91.7 and 44.83 ppm on the eastern and western sides, …
In Egypt, the natural phosphate rock is located in Sebaiya (Nile Valley), Safaga (Red Sea), and Abu Tartur (Western Desert). The higher the organic matter …
Egypt has about 4 percent of the world phosphate reserves (2.78 billion tons), and produces about 3 percent of the world phosphate production (about 6 million t/y).
The present work deals with radon pollution arising from granitic rocks using an Alpha Guard radon monitor. Forty-four granitic samples were collected from five sites located in the Central part of the Eastern Desert of Egypt. The minimum to maximum concentration of radon for the rocks of Gebel (mountain) El-Missikat MS, El-Gidamy …
On a global scale, the concentration of phosphate in phosphate. ... is the USGS, which shows that the current global resources of phosphate rock ar e more. than 300,000 billion tons, and the ...
15.1 Phosphate Deposits of Egypt: Composition, Origin, and Utilization Ahmed El-Kammar 15.1.1 Introduction Phosphate deposits are stratified shallow marine sedimentary …
Both the carbonate float and phosphate concentrate were filtered, washed, dried, weighed, and analyzed. Using this scheme, the following results were obtained for …
This paper presents a new solvent extraction method for rare earths from nitric acid leaching of phosphate rock using N,N,N′,N′-tetraoctyl diglycol amide (TODGA) without interfering with the normal route for fertilizer production. When the concentration of extractant increased to 0.1 mol/L, the extraction rate of lanthanum, cerium ...
Egyptian Rock Phosphate in standard shape or crushed size (-1MM : -4 MM ), we provide it with different grades from 24% : 30 % .
Researchers in Egypt have been interested in evaluating phosphate deposits from an economic point of view for the production of phosphoric acid and its derivatives, without addressing the phosphate content of these elements and their environmental and economic importance (El-Kammar et al. 1990; Abou El-Anwar et al. …
Egypt holds 4% of global phosphate deposits (2.78 billion tones) and produces 3% of global phosphate production (6 million tones / year). Keywords: Phosphate; ores; …
It consists of seven superposed layers (beds) which call for different strategy of concentration. The ore is composed predominantly by apatite (84% in weight basis) plus silicates (16%). In order to treat the ore from beds 1-5, a suitable standard mineral processing circuit (composed of scrubbing, screening, attrition and desliming) started its ...
Using this scheme, the following results were obtained for samples from two mines from the Red Sea Coast phosphate rock, Egypt ... This extremely important publication is a collection of abstracts of most of the published material on phosphate concentration all over the world since 1930. 5.
The distribution of phosphate resources in the world is approximated as follows: 75% from sedimentary marine deposits, 15-20% from igneous, metamorphic and weathered …
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 (Fig. 1), 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 …
Phosphate rock samples used in this study were collected from El Sebaiya (Nile Valley) 24 and 28 % P2O5, Safaga (Red Sea, Hamraween) 27,29 and 30% P2O5, Oroba 24% …
