La sépiolite est un absorbant minéral composé d'argile concassé. C'est un excellent absorbant pour éliminer les hydrocarbures accidentellement déversés. La sépiolite est utilisée la plupart du temps comme absorbant au sein de l'industrie. Il s'agit d'un absorbant granulé chimiquement inerte, non toxique et ininflammable, ce qui limite les risques …
Introduction. Sepiolite as well as palygorskite are one-dimensional (1D) microfibrous silicates belonging to the clay minerals family. They exhibit unique structural and textural characteristics that determine their use in diverse applications from industrial adsorbents to rheological additives (Álvarez et al., 2011).Recently, sepiolite has …
The morphology of sepiolite powders is composed of small micro fibrous porous bundles and, furthermore, ZnO nano-composites are placed as consolidated on the sepiolite structure. After sulfur was infused, the particles uniformly dispersed and observable aggregations appeared owing to thermal treatment ( Figure S1 ).
Micropore distribution and effective size of the channels of natural sepiolite from Turkey were measured by the BET method. Before the BET measurement, the samples were treated under a water vapour atmosphere at various pressures to fill progressively the sepiolite micropores with water.
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Abstract. This study aimed to assess the extractability of cadmium (Cd) and Cd uptake by rice after applying soil amendments of lime (Ca(OH) 2) and sepiolite.A rice (Oryza sativa) cultivation experiment was conducted in a Cd-contaminated paddy field.After applying lime, sepiolite, and a mixture of the two as soil amendments, soil pH showed a …
Adsorption of Cu(II) by sepiolite samples was investigated as a function of the initial Cu(II) concentration, solution pH, ionic strength, temperature and the presence of an inorganic ligand (Cl −). Changes in the surface and structure were characterized by means of XRD, IR and N 2 gas adsorption data.
A compositional gap between sepiolite and palygorskite has long been accepted even though they have similar structures, but recent studies found that such a gap does not exist and that the compositional series is continuous between them. If this is true, intergrowths between these two minerals should exist. The purpose of the present study …
The sepiolite raw material was purchased from the Liuyang Sepiolite Mining Industry Company of China. The support was prepared using sodium-leached sepiolite. The modification of sepiolite with sodium is expected to improve the thermal stability and cation exchange capacity of the sample, without altering the original structure of the …
Sepiolite is a hydrated magnesium silicate with a microfibrous morphology and a particular texture that provides a high specific surface area. Together with palygorskite, it forms the palygorskite–sepiolite series. The usual settings for sepiolite occurrences...
The palygorskite-sepiolite group of clay minerals has a wide range of industrial applications derived mainly from its sorptive, rheological and catalytic properties which are based on the fabric, surface area, porosity, crystal morphology, structure and composition of these minerals. For assessing potential industrial uses, the mineralogical ...
Sepiolite is a natural hydrated magnesium silicate clay mineral with a micro fibrous morphology and good sorptive property. Brauner and Preisinger 15 deduced the structure of the sepiolite by...
Sepiolite is a hydrated magnesium silicate with a microfibrous morphology and a particular texture that provides a high specific surface area. Together with …
Sepiolite, (German: "sea-"), a fibrous hydrated magnesium silicate, Mg4Si6O15(OH)2·6H2O, that is opaque and white, grey, or cream in colour. It may resemble the bones of the cuttlefish Sepia, from which the name derives. In the Black Sea region, where the light, porous clay mineral is abundant,
Sepiolite (Si 12 Mg 8 O 30 (OH,F) 4].(H 2 O) 4 ·8H 2 O) is a valuable filler with an enormous capacity to be used in thermoplastic composites, substituting costly reinforcing fillers, such as graphene and CNTs. Sepiolite strengthened polymers nanocomposite materials have encouraged the field of research and ventures because …
From TEM analysis (e.g. Fig. 4, Fig. 5) performed on each sepiolite powder a several representative micrographs were taken into account to perform a digital image analysis (on an average of 200 needles), in order to evaluate the dimension of the sepiolite fibres.TEM analysis, performed at low magnification on both pristine (Fig. 4 a) and …
Three TTB sepiolite muds with different salt content in their liquid phase were formulated to determine rheological and fluid loss properties in ambient conditions.
The batch technique was used to study the adsorption of La(III), Eu(III), Lu(III), and U(VI) ions on sepiolite and ODTMA–sepiolite under ambient conditions. The effects of pH, time, and initial concentration were investigated. The highest U(VI) adsorption was found on ODTMA-sepiolite in the pH range of 6–8, while in the case of lanthanide …
Semantic Scholar extracted view of "Sepiolite: Properties and Uses" by A. Álvarez. Skip to search form Skip to main content Skip to account menu. Semantic Scholar's Logo. Search 220,171,545 papers from all fields of science. Search. Sign In Create Free Account.
Thallium, a highly toxic trace element, being released into the environment by industrial mining has caused serious environmental pollution. Here, a magnetic Prussian Blue (PB) nanosorbent loading on sepiolite (PB/Fe 3 O 4 /SEP) was successfully synthesized for the deep treatment of Tl(I) based on its high adsorption capacity. The …
AbstractSelection of proper drilling fluid is recognized as a challenging process in high temperature environments. Therefore, chemical and physical properties of drilling mud should be suitable at high temperatures to minimize mud and borehole instabilities. This study is aimed to characterize rheological and filtration properties of …
Sepiolite is the hydrated magnesium silicate [(Si 12)(Mg 9)O 30 (OH) 6 (OH 2) 4 H 2 O] belonging to phillo-silicates. The structure of this mineral is formed by alternate building of blocks and tunnels, which grow up in the fiber direction. Each structural block is composed of two tetrahedral silica sheets sandwiching the central sheet of ...
The ability of Na+-, Li+-, K+-, Ca2+- and Mg2+-exchanged sepiolites and acid-activated sepiolites to remove ethylene from storage environments.
Sepiolite is a naturally occurring clay mineral of sedimentary origin. It is a nonswelling, lightweight, porous clay with a large specific surface area. Chemically, sepiolite is a hydrous magnesium silicate whose individual particles have a needle-like morphology. The high surface area and porosity of this clay account for its outstanding ...
جذب سطحی توسط جاذب های طبیعی مغناطیسی به دلیل ارزانی، دسترسی زیاد ، نداشتن خطرات زیست محیطی و قابلت جداسازی از محیط توسط میدان مغناطیسی روشی مناسب برای حذف رنگ از پساب های صنعتی می باشد. در این تحقیق خاک رس سپیولایت ...
Present review critically evaluates the applications of sepiolite in contaminated soils to adsorb toxic metals with an emphasis on cadmium (Cd) and lead …
Sepiolite is a natural layered silicate with high absorbency. The fine, yellowish-white filler swells when water is absorbed. Downloads. Details 58945e.pdf. Technical Data Chemical description: Sepiolite, CAS No. 6, EINECS 264-465-3; Suitability: Acrylics, Ceramic, Tempera, Watercolor / Gouache;
nevertheless, sepiolite is stable at temperatures up to 260 oC. Additionally, the basic structure of sepiolite is known to be firm in saturated saline-water phase. Turkey has the largest sepiolite clay deposits in the world; on the other hand, the usage of sepiolite clay as a drilling fluid not only in Turkey and but also in the world is ...
