SUSCEPTIBILITY OF INTERLAYER POTASSIUM IN MICAS TO ...

SUSCEPTIBILITY OF INTERLAYEE POTASSIUM IN MICAS TO EXCHANGE WITH SODIUM* by A. D. SCOTT and S. J. SMITH Department of Agronomy Iowa State University, Ames, Iowa ABSTRACT INTERLAYER K in muscovite, biotite, phlogopite, illite and vermiculite-hydrobiotite samples was replaced by cation exchange with Na.

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The reclamation of mica flakes from tailing disposal using ...

A sample from the small-sized tailing pile of an Iranian mica processing plant was subjected to a series of mica recovery experiments. Mineralogical and microscopic investigations indicated that the dominant mica mineral was phlogopite which was accompanied by plagioclase feldspars. Before beneficiation studies, the particle size distribution of the representative sample was …

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Potassium Release from Micas and Characterization of the ...

Potassium Release from Micas and Characterization of the Alteration Products - Volume 29 Issue 1

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Mica Weathering Rates as Related to Mica Type and ...

Potassium release rates from micas varying widely in type and composition were measured. A sodium tetraphenylboron solution was used as the extracting agent. Muscovites were found to be two orders of magnitude more stable than a naturally occurring phlogopite and biotite. Synthetic fluorphlogopite was as stable as some muscovites. Lepidolite was the most …

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Effects of Potassium Removal on the b-Dimension of ...

Potassium was removed from 5 to 20-μ size fractions of two phlogopites by treatment with sodium tetraphenylboron and replaced with various exchange ions. The b-dimension of the mica increased with K+ removal, which suggests that the K+ ion in phlogopite acts to constrain b. This being the case, the K—O bond in phlogopite must be lengthened and weakened relative to the …

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Mechanisms of potassium release from calcareous ... - …

Mechanisms of potassium (K) release and fixation in calcareous soils may differ from non-calcareous soils. In the current investigation, four soils with different properties were extracted three and 10 times (45 and 150 min, defined as short- and long-term respectively) with 0.025 mol L−1 CaCl2, HCl and oxalic and citric acid solutions and the contents of calcium …

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Podzol - discipline.ku.ac.bd

Potassium removal from micas. This process is particularly important in soil profiles which have high quantity of hydronium ion (H 3. O+) supplied from biological resources and a plentiful supply of micas from the parent materials.. Removal of a small amount of K from the interlayers of mica does not cause great distortion or loss of alignment of the silica-alumina …

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potassium removal from micas - krabice-na-pizzu.cz

Potassium Removal From Micas ekocieplotech.pl. potassium removal from micas aluminium cold roll mill. Removal of potassium from the interlayer space during weathering of micas i. 524 L533 f.486,~ 1.497.~ o 1.484 63.0 62.0 6t.O 60.0 20(CuKa) Fig. 3. 060 lines of dark-green micas (A, B) and light-green micas

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XRD Analysis of Mica Samples | PhysicsOpenLab

Chemically, micas can be given the general formula. X2Y4-6Z8 O 20 (OH,F) 4. Where. X is K, Na, Ca or less commonly Ba, Rb or Cs. Y is Al, Mg, Fe or less commonly Mn, Cr, Ti, Li, etc. Z is chiefly Si or Al but also may include Fe …

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Kinetics of potassium release from biotite in solutions ...

Reed, Marion Guy, "Kinetics of potassium release from biotite in solutions containing sodium tetraphenylboron " (1963). Retrospective Theses and Dissertations . 2361.

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The reclamation of mica flakes from tailing disposal …

creates a longstanding resource of potassium and magnesium which may be mobilized by solubilization as a result of weathering [4-6]. Micas differ greatly in their susceptibility to natural weathering processes [7, 8]. Furthermore, several types of mica . Ataallah B

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The kinetics of K-desorption from the interlayers of micas.

A method to measure the K-desorption from micas is presented, which allows the independent regulation of K and Ca concn, and of pH and temperature during the experiment to concn < 1 μmol K/litre. Loess soils, biotite and muscovite were percolated with CaCl2 solutions. Following the depletion of exchangeable K, percolation rates were varied to obtain differentiated curves …

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Release of non-exchangeable potassium from soils and ...

correlated with K removal by plants and with K-release from nonexchangeable forms during cropping. Fraps (1924, 1929), in short-term experiments with several Texas soils, found as much as 50% of the K absorbed by corn, kafir and sorghum was from nonexchangeable forms, yet the correlation coefficient for the relationships between

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Potassium Niobate Nanolamina: A Promising Adsorbent …

We report layered potassium niobate (K4Nb6O17) nanolamina as adsorbent to remove toxic Sr2+, Ba2+ and Cs+ cations from wastewater. ... such as synthetic γ-zirconium phosphate 1, micas 2,4, ...

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Uptake of cesium and strontium cations by potassium ...

In order for micas to be useful as industrial ion exchange materials, their interlayer K must be replaced with small hydrated cations such as Na, which can easily undergo ion exchange, resulting in an expansion of their d 001 spacing and an increase in surface area. Many procedures have been reported for the removal of K from the interlayers of ...

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Non-exchangeable potassium in southern African soils: a ...

Non-exchangeable potassium in southern African soils: a neglected reserve from a crop nutritional perspective Neil Miles 1 ... • Soils may contain minerals (typically micas & illites) that release K slowly and/or 'fix' it. ... K removal. Sugarcane response to potassium on a ...

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IMPACT OF MINERALOGY ON POTASSIUM DYNAMICS …

high in potassium (K) such as micas, K deficiency in rice paddy soils is increasing throughout Bangladesh. Harvesting of straw from fields exacerbates the removal of nutrients including K, and intensive cropping with unbalanced fertilizer has resulted in depletion of "readily available" K in large areas.

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POTASSIUM IN SOIL

POTASSIUM IN SOIL Soils are often high in total K, but most of it is unavailable for plant uptake. There are four major soil K pools; two of which the plant can access K from, and two that they cannot. The four pools of K are: Structural K: Immobile and tightly bound. Potassium is gradually released as minerals (micas and feldspar) weather over ...

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Forms of Potassium in Soil and their Relationship with ...

and crop removal. However in the soil, the amounts of non-exchangeable and total fraction are high as compared to water soluble and exchangeable fraction. About 98% of total K which forms the bulk of soil potassium generally having primary (micas and International Journal of Current Microbiology and Applied Sciences

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The use of clinoptilolite to remove potassium selectively ...

The use of clinoptilolite to remove potassium selectively from aqueous solutions of mixed salts L. L. Ames; ... K-DIOCTAHEDRAL 1M MICAS FROM X-RAY DIFFRACTION AND INFRARED SPECTROSCOPY DATA ... Potassium Distribution and Metasomatism In Pelites and Schists: How and When, Relation To Postdepositional Events ...

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POTASSIUM - Kansas State University

POTASSIUM Potassium is the last of what might be called the "big three" soil nutrients – nitrogen, ... Alfalfa Potassium Removal By Crops Corn Firing Soybeans. phosphorus and sulfur, but remains active in ... Unavailable K is contained in micas, feldspars and clay minerals. Plants cannot use potassium

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Selective dissolution of micas from potassium feldspars by ...

The J. Lawrence Smith (1865) sodium pyrosulfate fusion is employed to decompose micas by removing octahedral cations so that their relics become readily soluble in the 0.5 N NaOH 150-second-boiling treatment of Hashimoto and Jackson (1960). Micas are thus selectively dissolved away from potassium feldspars, which are shown to be remarkably resistant to the treatment.

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Exchangeable Potassium Levels in Vermiculite and K ...

Interstratified layer silicates were produced by K removal from the natural micas, and were also formed by additions of K to vermiculite. At natural levels of total K in the micas (7 to 10% K 2 O), 10Å. material was present; considerable 14Å. material was produced as …

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