Fertilizing Properties of Potassium Feldspar Altered Hydrothermally. Davide Ciceri Department of Materials Science and ... calcium (Ca) supplied or with adjustment of soil acidity by the hydrothermal material. The hydrothermal material is a K fertilizer at least as effective as KCl since it yields the same or better plant weight. KEYWORDS: ...
عرض المزيدThe resulting feldspar dissolution rate determined in the laboratory is considered too slow for fertilizer purposes (10 −10 to 10 −13 mol K + m −2 s −1), but conflicting agronomic results demonstrates that the key issue is determining if the actual dissolution rate in soil could be synchronized with the rate of crop uptake, which in ...
عرض المزيدHigh-potassium fertilizers can be used to feed a variety of plants, including fruits, vegetables, flowering perennials, and shrubs. It is also frequently recommended for feeding lawns to help them survive hot, dry summers. Obviously, high-potassium fertilizers work wonders for plants growing in potassium-deficient soils.
عرض المزيدPotassium feldspar is directly applied as a slow-release fertilizer; Potassium feldspar is one of the raw materials for producing potassium fertilizer. Silicon, calcium and other elements in potassium feldspar are combined with potassium to produce compound fertilizer; Preparation of compound fertilizer by coupling reaction of potassium ...
عرض المزيدMaterials. Potassium rocks were used as mineral potassium sources. The polyhalite potassium mineral (KR polyhalite) was extracted from the Boulby mine (North Yorkshire, UK).The feldspar potassium mineral (KR feldspar) was extracted from a mine in Poços de Caldas (Minas Gerais, Brazil).The samples of KR polyhalite and KR feldspar were …
عرض المزيدTo date, various techniques have been developed to extract potassium from K-feldspar and produce a soluble potassium fertilizer. This review summarizes the …
عرض المزيدNatural potassium fertilizer (NPF) is a new concept for achieving the sustainability in modern agriculture system by the bioactivation of natural minerals by the …
عرض المزيدAgronomy researcher Maria Inês Lopes de Oliveira waters plants at an Embrapa greenhouse in Brazil, where experiments show a new potassium fertilizer, …
عرض المزيدMIT postdoc associate Taisiya Skorina explains how surface roughness, a combination of pores and cavities in particles of finely ground feldspar, helps promote release potassium for fertilizer. She has developed a process to chemically alter …
عرض المزيدPotassium-solubilizing bacteria are an important microbial group that play a critical role in releasing mineral potassium from potassium-containing minerals, e.g., potassium feldspar. Their application may reduce eutrophication caused by overused potassium fertilizers and facilitate plants to utilize environmental potassium. In this …
عرض المزيدFertilizers 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
عرض المزيدTo 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 …
عرض المزيدAbstract 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, …
عرض المزيدThe term "potash" survives in the literature of agriculture and the fertilizer industry to refer to the oxide, K 2 O. ... The stabilities of potassium feldspar and its low temperature breakdown products are shown in Figure P65. Projection of the feldspar dissolution surface down the log [Al 3+]/ ...
عرض المزيدBiological 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 ...
عرض المزيدResearch Strategy. Extract potassium from K Feldspar. Understand fertilizer interaction with varied soil compositions. Design feldspar-derived potassium fertilizer varieties. …
عرض المزيدLeaching tests show that potassium is now available in the final product, along with other micronutrients. Potassium feldspar is cheap to mine, has lower associated transportation costs ...
عرض المزيدweathering of feldspar is too slow to meet agricultural needs. Thus, how to accelerate the release of nutrients from the feld-spar and provide absorbable nutrients for plant growth in acid soils is a huge challenge. From the perspective of potassium fertilizer, water‐solu-ble potassium ores are currently the main source; however,
عرض المزيدPotassium solubilizing bacteria (KSB) have been suggested to increase the activity of soil enzymes and increase the release of potassium from natural K-feldspar in the arid degraded soil, and thus ...
عرض المزيدThe thermal decomposition mechanism of K-feldspar with industrial waste of FGD gypsum to produce soluble potassium (K) salt was investigated. Effects of the reaction temperature and the amount of reagents used on the recovery of K were studied. The results showed that increasing the reaction temperature and mass ratio of CaCO3/KAlSi3O8 and …
عرض المزيدPotassium fertilizer via hydrothermal alteration of K-feldspar ore The MIT Faculty has made this article openly available. ... and cost-effective processes that enhance the availability of potassium ions from the feldspar's alumino-silicate framework. Engineering such processes requires a simultaneous consideration of the chemical behavior of ...
عرض المزيدThe experiment employed a split-plot design with three replicates, where the main plot factor was MBc (with and without), and the subplot factor was the sources of potassium fertilizer (control ...
عرض المزيدPotassium feldspar enables water-soluble fertilizer production for sustainable agriculture. •. Carbonated consolidation process enhances formed coke …
عرض المزيدNatural 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. ... Feldspar and mica, which account for 9097% of total K, are also the most common components of soil-K, according to McAfee . K-feldspar, …
عرض المزيدMost 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.
عرض المزيدMIT postdoc associate Taisiya Skorina explains how surface roughness, a combination of pores and cavities in particles of finely ground feldspar, helps promote release potassium for fertilizer ...
عرض المزيدRequest PDF | Fertilizing Properties of Potassium Feldspar Altered Hydrothermally | The material obtained through hydrothermal alteration of K-feldspar …
عرض المزيدCONCLUSION. •Potassium fertilizers (potash)as a problematic commodity. •Hydrothermal treatment of earth abundant silicate resources (e.g., K-feldspar) as a local and affordable alternative to potassium salts. •Hydrothermally treated K-feldspar as a interesting material for tropical countries: mineralogy, potassium release ≈ 20 g.
عرض المزيد1. Introduction. K-feldspar is a typical insoluble potassium resource with large reserves and wide distribution. Because there are few sources of soluble potassium in natural resources, extracting potassium from K-feldspar has become a strategic demand in the industry (Su et al., 2015, Ciceri et al., 2017).The K-feldspar is also …
عرض المزيدThe feldspar-water system is arguably one of the most important in the earth sciences, in particular with respect to chemical weathering associated with water-rock interactions. ... Potassium fertilizer via hydrothermal alteration of K-feldspar ore. Green Chem., 19 (2017), pp. 5187-5202.
عرض المزيدKeywords: potassium, feldspar, leucite, extraction, activation method, milling, roasting INTRODUCTION Fertilizer is an important commodity in supporting national food security. One of the main elements of fertilizer needed in large quantities by plants as a macro element is potassium (K) but it still relies on imports.
عرض المزيدa green-chemistry paradigm for the synthesis of potassium fertilizers. Keywords: fertilizers, K-feldspar, hydrothermal chemistry, potash, ultrapotassic syenite. 1. …
عرض المزيدAfter sintered at 1220 °C, the plant‐available Si, Ca, K and Mg contents in the fertilizer were 15.1%, 21.6%, 5.4% and 2.4%, with the proportion of 45% potassium feldspar, 33% limestone and 22% ...
عرض المزيدIn this work, we synthesize according to green-chemistry principles a novel potassium-bearing material which mineralogy and elemental release have the potential to overcome the limitations of KCl. We process in mild hydrothermal conditions (T = 200 °C; P∼ 14 atm; t = 5 h) locally available K-feldspar ore (ultrapotassic syenite) and CaO.
عرض المزيدNot 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.
عرض المزيدTo recover potassium from feldspar, a biowaste, i.e., eggshell, was used. ... Further, potassium perchlorate was thermally decomposed to give fertilizer grade potassium chloride (purity: 99.81%).
عرض المزيد