Research Progress on Extracting Potassium and Preparing …
Download Citation | Research Progress on Extracting Potassium and Preparing Compound Fertilizer from Potassium Feldspar | A variety of potassium extracting technologies from potassium feldspar ...
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(PDF) Use of potassium bio-fertilizers technology for …
Most common deposits of potassium are feldspar and mica. The available K level in soil dropped in the last decade due to rapid development of agriculture and application of imbalanced fertilizers ...
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Potassium fertilizer via hydrothermal alteration …
Augmenting fertilizer use conflicts with environmental concerns such as eutrophication and soil pollution, as well as with limited availability of fertilizers in the Global South. Currently, potassium fertilizers are …
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Evolution of mineral phases and microstructure of high …
Potassium feldspar (K-feldspar) was decomposed with limestone and dolomite as additives to prepare alkaline mineral silicon-calcium-potassium-magnesium …
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Potassium fertilizer via hydrothermal alteration of …
In this work, we synthesize according to green-chemistry principles a novel potassium-bearing material which mineralogy and elemental release …
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Potassium fertilizer via hydrothermal alteration of K-feldspar …
Fertilizers ensure the necessary agricultural yields to feed an increasing world population. Augmenting fertilizer use conflicts with environmental concerns such as eutrophication and soil pollution, as well as with limited availability of fertilizers in the Global South. Currently, potassium fertilizers are
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An efficient milling-assisted technology for K-feldspar …
An economical potassium feldspar-derived adsorbent (PFDA) was synthesized using potassium feldspar as the main raw material through ball milling-thermal activation technology to solve this problem. ... This implies that we can use this new carrier material for bio-potassium fertilizer, which may be able to efficiently supply soil …
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MIT Open Access Articles Potassium fertilizer via …
MIT Open Access Articles Potassium fertilizer via hydrothermal alteration of K-feldspar ore. RO. ALTERATION OF K-FELDSPAR ORE. Davide Ciceri, Marcelo de Oliveira, …
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Nutrient release from K-feldspar ore altered in hydrothermal …
The development of potash materials from local K-bearing resources such as aluminosilicate minerals is desirable to overcome reliance on imported fertilizers in tropical countries. However, the nutrient release from such materials follows a time-dependent profile that is not well-understood and that is significantly different if probed at agronomic …
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Potassium fertilizer via hydrothermal alteration of K-feldspar …
Augmenting fertilizer use conflicts with environmental concerns such as eutrophication and soil pollution, as well as with limited availability of fertilizers in the Global South. Currently, potassium fertilizers are soluble salts such as KCl, which are mined in the northern hemisphere. Two key issues arise for tropical agriculture.
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Potassium supply in agriculture through biological potassium fertilizer
Biological potassium fertilizer (BPF) is a promising technology to improve potassium availability in the soil through the bio-activation of endogenous K-reserves. A group of microorganisms has been recognized for K solubilization from insoluble silicate minerals (e.g. biotite, feldspar, illite, muscovite, orthoclase and mica) and these ...
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Review on K-Feldspar Mineral Processing for Extracting …
To address the insufficient supply of soluble potassium fertilizers in China, the application of appropriate processing methods to extract potassium from K-feldspar and transform it into a soluble ...
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Fertilizing Properties of Potassium Feldspar Altered …
The material obtained through hydrothermal alteration of K-feldspar rock in alkaline conditions is a potential source of soluble potassium (K), but agronomic testing …
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Potash: A silent crisis brews
Not all silicate minerals contain potassium, so not all are appropriate as a potassium fertilizer source. Stillings said her research on feldspar, a potassium-bearing silicate, showed that on the surface of the dissolved feldspar mineral, the leach layer is thicker at more acidic solutions.
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Mineral sources of potassium for plant nutrition. A review
Recently published assessments of nutrient budgets on a national basis have shown that K deficits for developing countries are so substantial that a doubling of world production of potash fertilisers would be required to balance inputs and offtake, simply to meet demands in Africa alone. The price of potassium fertiliser raw materials has …
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Leaching study boosts potash alternative
Potassium feldspar is a silicate mineral, which also contains silicon, oxygen, and aluminum. "Results obtained from such a device challenge the notion that silicate minerals cannot be used as alternative fertilizers for tropical soils," the researchers report in "Microfluidic Leaching of Soil Minerals: Release of K+ from K-Feldspar ...
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[PDF] Fertilizing Properties of Potassium Feldspar Altered
ABSTRACT The material obtained through hydrothermal alteration of K-feldspar rock in alkaline conditions is a potential source of soluble potassium (K), but agronomic testing is needed to verify its capacity to supply K to crops. A (NH4)2SO4-based bioassay was used to test the capacity of the material to supply K to tomato plants …
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Potassium fertilizer via hydrothermal alteration of K-feldspar …
Fertilizers ensure the necessary agricultural yields to feed an increasing world population. Augmenting fertilizer use conflicts with environmental concerns such as eutrophication and soil pollution, as well as with limited availability of fertilizers in the Global South. Currently, potassium fertilizers are soluble salts such as KCl, which are …
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Process for producing slow releasing silicon potassium …
The invention discloses a method using potash feldspar to produce slow release compounding silicon potash fertilizer. It uses potash feldspar, dolomite or/and serpentine, carbon as raw material. After mixing, heating to melting state to take baking reaction, cooling to natural temperature to form sand form semi-product after quenching, …
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Rock inhabiting potassium solubilizing bacteria from Kerala, …
The role of rock inhabiting bacteria in potassium (K) solubilization from feldspar and their application in crop nutrition through substitution of fertilizer K was explored through the isolation of 36 different bacteria from rocks of a major hill station at Ponmudi in Thiruvananthapuram, Kerala, Ind …
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Extraction of potassium from K-feldspar via the CaCl2 calcination route
1. Introduction. Potassium is one of the three most important nutritional elements for crop growth. The crop yield has been reported to be increased by 20% to 30% when potash fertilizers are applied to the potassium-deficient soils [1].The water-soluble potassium resources in China, however, are very scarce and account for only 2.20% …
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Natural Potassium Fertilizers for Sustainable Agriculture
Natural potassium fertilizer (NPF) is a new concept for achieving the sustainability in modern agriculture system by the bioactivation of natural minerals by the potassium solubilizing microbes. NPF technology improves K accessibilityin soil solution through the microbial-activation of natural K-reserves, i.e., biotite, muscovite, feldspar ...
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Evolution of mineral phases and microstructure of high …
Abstract Potassium feldspar (K-feldspar) was decomposed with limestone and dolomite as additives to prepare alkaline mineral silicon-calcium-potassium-magnesium fertilizer (abbreviated as Si–Ca–K–Mg fertilizer) via high temperature calcination route. The effects of calcination temperature on the mineral composition, …
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Affordable potassium fertilizer from K feldspar for …
Extract potassium from K Feldspar; Understand fertilizer interaction with varied soil compositions; Design feldspar-derived potassium fertilizer varieties; Engineerfertilizer varieties to meet varied soil conditions
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Silicate minerals
But a major part of potassium exists in insoluble form as silicate minerals abundantly in these countries which can compensate for the potassium deficit. Mostly feldspar and feldspathoid from the tectosilicate group and micaceous minerals from the phyllosilicate group are the common potassium bearing silicates containing 5–15% K 2 …
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Potassium sources, microorganisms and plant nutrition: …
To compensate for these losses, massive use of K fertilizers in agriculture has been suggested. Potassium fertilizers are manufactured from rock minerals, particularly sylvite (KCl) ... Among these rock minerals, feldspar and mica represent 90%–98% of the total (Zhang and Kong, 2014), and K release from these two minerals …
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Fertilizing Properties of Potassium Feldspar Altered …
ABSTRACT. The material obtained through hydrothermal alteration of K-feldspar rock in alkaline conditions is a potential source of soluble potassium (K), but …
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The hydrothermal alkaline alteration of potassium feldspar…
The hydrothermal alkaline alteration of potassium feldspar: A nanometer-scale investigation of the orthoclase interface. ... The extraction of K-fertilizer from K-feldspars has a more than century-long history behind it, as described in Ciceri et al. (2015). Despite this, little is known on the exact mechanism controlling this …
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Review on K-Feldspar Mineral Processing for Extracting …
The K-feldspar mineral is an insoluble potassium resource with a high potassium content and the most extensive and abundant reserves. To address the insufficient supply of soluble potassium fertilizers in China, the application of appropriate processing methods to extract potassium from K-feldspar and transform it into a …
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Extraction of KCl from Potassium Feldspar by Various …
In this study, different kinds of salts were used as additives in order to extract potassium from potassium feldspar to produce KCl for use as fertilizer. In this context, CaCl 2, NaCl, and CaSO 4 salts were studied to clarify if it was possible to extract potassium with high efficiency by using these inorganic salts.
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