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Mineral acids were used to extract calcium and iron from red gypsum. • Kinetic analysis of red gypsum dissolution was performed. • H 2 SO 4 performed better than HCl and HNO 3 for calcium leaching.. Increasing reaction time and temperature is
PDF On Oct 12, 2014, Amin Azdarpour and others published Extraction of Calcium from Red Gypsum for Calcium
Red gypsum with average particle size of less than 45 μm produces iron carbonate and calcium carbonate with the purity of 9.09% and 13.09%, respectively.
The concentration of 1.4 M MEA absorbed significantly more carbon dioxide than the other concentrations to precipitate the calcite. As a result, 10 g of red gypsum
DOI: 10.1016/J.FUPROC.2014.09.034 Corpus ID: 97659339; Extraction of calcium from red gypsum for calcium carbonate production @article{AzdarpourExtractionOC,
Calcium carbonate provides a reactive surface for adsorption and pre cipitation reactions, for example, of phosphate (Boischot et al., 1950; Talibudeen Arambarri, 1964; Amer et al. ,
Calcium carbonate (CaCO 3) has been used as a bone substitute, and is a precursor for carbonate apatite, which is also a promising bone substitute.However,
Calcium oxide is also a major component of ISA, and can be extracted by one of the reported techniques available for the recovery of calcium oxides from calciumrich waste such as gypsum [17, 18
Recov ery of sulphur and calcium carbonate from waste gypsum NR Nengovhela 1 *, CA Strydom 2,JP M aree 3,S Oosth uizen 4 and DJ Th eron 4 1 Depar tment of Chemis try, Universit y of Pretoria
The recovery of calcium carbonate from waste gypsum (a waste product of the reverse osmosis (RO) desalination process) was tested using sodium carbonate. Batch recovery
The cooperative project, “Catalão Monazite: Economical exploitation of rare earth elements from monazitebearing secondary raw materials,” intends to extract rare earth elements from these gypsum
These companies extract, treat, charge and commercialize phosphate and its derivatives, in particular phosphoric acid and fertilizers. Altiner M () Effect of alkaline types on the production of calcium carbonate particles from gypsum waste for fixation of CO 2 by mineral carbonation. Int J Coal Prep Util 39:1–19.
Large amounts of dry solid residues are produced during the extraction of bitumenrock asphalt, which has the potential to be a calcium of recovery for the development of valueadded carbonate minerals via CO 2 mineralization. The objective of this research was to use the calcinationdissolutionprecipitation (CDP) method to
The availability of Ca from different levels of gypsum and calcium carbonate in a nonsaline sodic soil has been investigated. Different levels of tagged gypsum (Ca45SO4.2H2O) and calcium carbonate (Ca45CO3) (i.e. 0, 25, 50, 75, and 100 per cent of gypsum requirement) were mixed thoroughly in 3.5 Kg of a nonsaline alkali soil (ESP, 48.4; ECe, 2.68
A method for separating a suspension containing gypsum granules and calcium carbonate granules and an aqueous solution, wherein the aqueous solution comprises at least one sodium salt, wherein the aqueous solution has a sodium ion concentration of at least 3 g/L and wherein such method comprises a step of separation by flotation using a collector for
products like sulphur and calcium carbonate be recovered from the low quality gypsum. The aim of this project was to evaluate a process for converting waste gypsum into sulphur. The process evaluated consists of the following stages: reduction of gypsum to calcium sulphide; stripping of the sulphide with CO. 2. gas and the production
The calcium carbonate (CaCO 3) films grown by aqueous solution chemistry on magnesium using a simple, undiluted extract), 2fold (50 µL extract and 50 µL culture medium), 5fold (20 µL extract and 80 µL culture medium), and 10fold (10 µL extract and 90 µL culture medium). After cell incubation in standard conditions for 24 h and 72 h
Researchers want to combat climate change by chemically converting carbon dioxide into rock on a grand scale. A new method for combatting climate change feels like a bit of modernday alchemy: scientists have figured out how to take carbon dioxide out of the ocean and turn it into harmless rock. For every tonne of carbon dioxide
Add dilute hydrochloric acid to convert the calcium oxalate to a calcium chloride solution. 3 Add concentrated sodium carbonate to the calcium chloride solution from step two to obtain calcium carbonate as a precipitate. Filter off this precipitate and wash it. Dry the calcium carbonate in an oven at 248 degrees Fahrenheit. 4
The agglomerated cluster was observed with a rhombohedral shape with 3 and 5 vol% of aloe vera extract under the temperature of 30℃. The obtained PCC yield was 91, 72 and 93% at 30, 50 and 100℃, respectively with 10 vol% of aloe vera extract. Keywords: Aloe vera extract, Aragonite crystal, Morphology, Precipitated calcium carbonate.
The difficulttoremove CaSO 4 scale layer attached to an evaporator wall is a major problem in related industries. How to efficiently remove the CaSO 4 scale layer and convert it into fine chemicals with high added value, so as to turn waste into treasure, is a current research hotspot. In this study, a CaSO 4 scale layer was removed by 15 min
The cooperative project, “Catalão Monazite: Economical exploitation of rare earth elements from monazitebearing secondary raw materials,” intends to extract rare earth elements from these gypsum
These companies extract, treat, charge and commercialize phosphate and its derivatives, in particular phosphoric acid and fertilizers. Altiner M () Effect of alkaline types on the production of calcium carbonate particles from gypsum waste for fixation of CO 2 by mineral carbonation. Int J Coal Prep Util 39:1–19.
Calcium carbonate (CaCO 3) has been used as a bone substitute, and is a precursor for carbonate apatite, which is also a promising bone substitute.However, limited studies have been reported on the fabrication of artificial calcite blocks. In the present study, cylindrical calcite blocks (ϕ6×3mm) were fabricated by compositional transformation
Large amounts of dry solid residues are produced during the extraction of bitumenrock asphalt, which has the potential to be a calcium of recovery for the development of valueadded carbonate minerals via CO 2 mineralization. The objective of this research was to use the calcinationdissolutionprecipitation (CDP) method to
Gypsum is calcium sulfate, and lime is calcium carbonate. Both are soil amendments, and both provide calcium. Only gypsum provides a source of sulfur. Gypsum is actively marketed as a soil amendment. Gypsum can be mined. Mined gypsum is a relatively pure and clean product depending on how many other minerals are present. It
The purpose of this study is to find the optimum conditions, including the type and concentration of solvent, and the solid/liquid ratio, for the extraction of calcium from Paper Sludge Ash (PSA). Solvents with different properties are divided into the following three groups to conduct the calcium extraction experiments: acid (acetic acid and
The agglomerated cluster was observed with a rhombohedral shape with 3 and 5 vol% of aloe vera extract under the temperature of 30℃. The obtained PCC yield was 91, 72 and 93% at 30, 50 and 100℃, respectively with 10 vol% of aloe vera extract. Keywords: Aloe vera extract, Aragonite crystal, Morphology, Precipitated calcium carbonate.
Here we report the mechanism by which gypsum rocks from the Atacama Desert, Chile, provide water for its colonizing microorganisms. We show that the microorganisms can extract water of crystallization (i.e., structurally ordered) from the rock, inducing a phase transformation from gypsum (CaSO 4 ·2H 2 O) to anhydrite (CaSO 4).
2) for calcium sulfate, carbonate (CO 3 2) for calcium carbonate, chloride (Cl) for calcium chloride, nitrate (NO 3 ) for calcium nitrate, etc. GYPSUM AND CALCIUM SULFATE ANHYDRITE The most widely used calcium soil additive is gypsum. Gypsum is one of the family of calcium sulfates. The chemical formula for gypsum is CaSO 4.2H 2 O. This
