تكنولوجيا معالجة Sepiolite

Silica–alumina/sepiolite nanoarchitectures

The incorporation of a silica–alumina network on the surface sepiolite also permits the tuning of its surface acidity, typical values increasing from 0.1 to 1.4 mmol of acid sites per gram, according to the aluminium content. The acid–base properties of the new nanoarchitectures were evaluated as acid catalysts from the 2-propanol ...Preparation and Photocatalytic Performance of …2021-6-17 · Photocatalytic technology is a widely used water treatment method, whose efficiency can be increased by developing a suitable photocatalyst fabrication procedure. In this study, five different synthesis methods were utilised for the preparation of novel ZnO/sepiolite photolytic composites, namely, sol-gel method, hydrothermal reduction, hydrolytic precipitation, powder …

Effects of low molecular weight organic acids on …

2020-11-4 · The effects of low molecular weight organic acids (LMWOAs) on the adsorption of quinclorac by sepiolite were investigated using laboratory batch technique. Experiments were conducted with two natural sepiolite samples with different crystal structures and chemical compositions and high-purity sepiolite. - 2020-9-2 · . ,、、,。.,。. 。., ...

Removal of heavy metal ions by porous sepiolite-based …

2020-11-1 · Sepiolite is a hydrous magnesium silicate featured by its fibrous structure and molecular-sized channels [, ]. A variety of industrial applications such as ceramics, paint, fire-retarded materials and water treatment have been explored. As an ion exchanger, low-cost sepiolite has great potential for removing heavy metal ions from wastewater.Wholesale Sepiolite Suppliers, Distributors, Exporters, …SEPIOLITE FIBER. FOB Price: 200 - 500 USD / Metric Tons. Port: ANY CHINESE PORT. Place of Origin Liaoning, China (Mainland) Loss On Ignition 0.58-9.74. Working Temperature 1500-1700. Application BUILDING MATERIALS, BRAKE ETC. China Shenyang Jia Hong Tai Trading Co., Ltd. Free Member |.

Sepiolite

Sepiolite is a fibrous silicate, Si 12 Mg 8 O 30 (OH) 4 (H 2 O))4, made up of microporous channels parallel to the fiber axis. The chemical composition and structure of sepiolite are responsible for good adsorbent behavior towards polar molecules such as water, ammonia, amines and aldehydes in both gas and liquid phases because of its ...Sepiolite: Properties and Uses - ScienceDirectAbstract. The structure and properties of sepiolite are reviewed. Surface properties, such as porosity and sorption are detailed, as well as dehydration and thermal behaviour. Industrial applications of sepiolite are based on: a) Sor-btive properties; b) rheological properties; c) catalytic properties; The Theological behaviour of sepiolite ...

Preparation of cellulose/sodium alginate/sepiolite porous ...

2021-2-23 · Parameters affecting dye uptake (such as pH and sepiolite content) were evaluated, and pH of 7 and MSS-30 microsphere were taken as the optimal removal environment and adsorbent. The maximum adsorption capacity of MSS-30 microsphere was found to be 319.5 mg/g, indicating an efficient and feasible adsorbent for removal from wastewater.「」2  · 「」[a3dc796](sepiolite)1789,""。,,。,..

Recyclable NiO/sepiolite as adsorbent to remove organic …

2022-2-21 · The NiO/sepiolite materials act as an adsorbent/catalyst. It comprises a unique combination of adsorption and high-temperature gas flow regeneration (the NiO/sepiolite acts as a catalyst at this ...「」2  · 「」[a3dc796](sepiolite)1789,""。,,。,..

Sepiolite Nanomaterials: Structure, Properties and …

2019-1-1 · Sepiolite is a natural magnesium-rich hydrous silicate clay mineral with fibrous crystal morphology (Fig. 3.2A).The ideal structural formula of sepiolite is Si 12 O 30 Mg 8 (OH) 4 (OH 2) 4 ·nH 2 O, as proposed independently by Nagy and Bradley and Brauner and Preisinger .According to them, the crystalline lattice of sepiolite was composed of silicon‑oxygen …Sepiolite | IMA EuropeSepiolite, formerly known as Meerschaum (sea froth), is a non-swelling, lightweight, porous clay with a large specific surface area. Unlike other clays, the individual particles of sepiolite have a needle-like morphology. The high surface area and porosity, as well as the unusual particle shape of this clay account for its outstanding sorption ...

Frontiers | Sepiolite-Hydrogels: Synthesis by Ultrasound …

2021-8-13 · Sepiolite and palygorskite fibrous clay minerals are 1D silicates featuring unique textural and structural characteristics useful in diverse applications, and in particular as rheological additives. Here we report on the ability of grinded sepiolite to generate highly viscous and stable hydrogels by sonomechanical irradiation (ultrasounds). Adequate drying of such …Preparation and Photocatalytic Performance of …2021-6-17 · Photocatalytic technology is a widely used water treatment method, whose efficiency can be increased by developing a suitable photocatalyst fabrication procedure. In this study, five different synthesis methods were utilised for the preparation of novel ZnO/sepiolite photolytic composites, namely, sol-gel method, hydrothermal reduction, hydrolytic precipitation, powder …

Sepiolite-Based Adsorbents for the Removal of Potentially …

2018-8-3 · Sepiolite is a clay mineral with a hydrous magnesium silicate, it is a member of the orthorhombic crystal system. It presents a structure of needle-like particles and has talc-like layers that consist of two layers of tetrahedral silica and a central octahedral magnesium layer . As a result of its particular crystal structure, sepiolite has ...Sepiolita | Sepiolite Clay and Powder …Sepiloite clay mineral is a specialized light weight mineral which has many unique characteristics of its own. The mineral is light, porous and has high surface area with unusual particle shape, these unique characteristics makes this material …

Sepiolite nanofiber-supported platinum nanoparticle …

2016-7-5 · Sepiolite nanofiber suspension containing 0.6 pretreatedsepiolite mixedsolutions furtherstirred centrifuging,washed deionizedwater threetimes. Finally, precipitateswere dried 12hours under vacuum hours.Samples differentnominal weight 0.1,0.5 werealso prepared ...Preparation of cellulose/sodium alginate/sepiolite porous ...2021-2-23 · Parameters affecting dye uptake (such as pH and sepiolite content) were evaluated, and pH of 7 and MSS-30 microsphere were taken as the optimal removal environment and adsorbent. The maximum adsorption capacity of MSS-30 microsphere was found to be 319.5 mg/g, indicating an efficient and feasible adsorbent for removal from wastewater.

Removal of heavy metal ions by porous sepiolite-based …

2020-11-1 · Sepiolite is a hydrous magnesium silicate featured by its fibrous structure and molecular-sized channels [, ]. A variety of industrial applications such as ceramics, paint, fire-retarded materials and water treatment have been explored. As an ion exchanger, low-cost sepiolite has great potential for removing heavy metal ions from wastewater.Sepiolita | Sepiolite Clay and Powder …Sepiloite clay mineral is a specialized light weight mineral which has many unique characteristics of its own. The mineral is light, porous and has high surface area with unusual particle shape, these unique characteristics makes this material …

Development and application of lanthanum peroxide …

Herein, a new lanthanum peroxide-loaded sepiolite nanocomposite was fabricated via a facile in-situ co-precipitation method and demonstrated the excellent properties on removal of phosphate and inhibition of cyanobacteria growth. The optimized nanocomposite (termed as LPS30) prepared with a La-to-Sepiolite mass ratio of 0.3:1 demonstrated the ...Silica-sepiolite nanoarchitectures - PubMedSilica-sepiolite heterostructured materials have been prepared as novel nanoarchitectures by generation of SiO2 nanoparticles (NPs) on the surface of the sepiolite fibrous clay mineral. The synthetic approach implies the use of organo-sepiolites dispersed in isopropanol to which is incorporated a se …

Sepiolite

The Batallones sepiolite deposit is located near the villages of Torrejón de Velasco and Valdemoro (province of Madrid; Figure 7).Both mapping and sedimentological analysis allow three main lithological units to be distinguished (Pozo et al., 2004): (I) mudstones, dolomitic mudstones and Mg-bentonites; (II) sepiolite and opal-CT; and (III) limestones, marls and siliciclastic …Sepiolite - an overview | ScienceDirect TopicsX. Wang, D.-Y. Wang, in Novel Fire Retardant Polymers and Composite Materials, 2017 Sepiolite. Sepiolite is a hydrated magnesium silicate with a microfibrous morphology and a particular texture that provides a high specific surface area (about 200 ∼ 300 m 2 /g). 71 It is built up by blocks structurally similar to layered clay minerals (ie, MMT). ). Hapuarachchi and Peijs 72 developed …

SEPIOLITE | Gelest, Inc.

6 kg. $84.00. Add to Cart. Product data and descriptions listed are typical values, not intended to be used as specification. Identifying Information. HMIS. 1-0-0-X. Molecular Formula. Mg 4 Si 6 O 15 · 6 H 2 O.Sepiolite - Saint-HilairePHYSICAL CHARACTERISTICS: Color is usually white or very pale green. Luster is dull. Diaphaneity is opaque. Crystal System is orthorhombic; Pncn. Crystal Habits include fibrous aggregates to 5mm. Cleavage {110} is good (rarely discernible). Fracture is not observed. Hardness is 2 – 2.5.

Surface grafting of sepiolite with a phosphaphenanthrene ...

2020-3-7 · In this regard, natural sepiolite (SEP) is a known flame retardant for PLA mainly due to high loading (at least 25 wt %). In this study, SEP was surface-modified by grafting with 9,10-dihydro-9-oxy-10-phosphaphenanthrene-10-oxide (DOPO) via the condensation between amino groups and salicylaldehyde with a grafting ratio of approximately 12.8%._2021-1-29 ·  (sepiolite clay), 、、, 、、。. . . . sepiolite clay. . . . 、.

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2  · 「」[a3dc796](sepiolite)1789,""。,,。,..Scientific Opinion on the safety and efficacy of a …2021-9-6 · toxicity. No toxic effects of sepiolite were observed in a 12 week rat study when tested alone (1.5%) or in a 28 day study when tested as Toxfin ® Dry (0.5%) by oral route. There is limited evidence that sepiolite is potentially carcinogenic by parenteral routes (inhalation, intrapleural and intraperitoneal).

Adsorption of cobalt from aqueous solutions onto sepiolite

Adsorption of Co (II) ions from aqueous sepiolite suspensions has been systematically investigated as a function of several variables including activation conditions, solid to liquid ratio, pH and temperature. The results are analyzed to identify the mechanism of cobalt uptake by sepiolite. Both abstraction and real adsorption isotherms were ...Recyclable NiO/sepiolite as adsorbent to remove organic …2022-2-21 · The NiO/sepiolite materials act as an adsorbent/catalyst. It comprises a unique combination of adsorption and high-temperature gas flow regeneration (the NiO/sepiolite acts as a catalyst at this ...

Frontiers | The Structure and Properties of Sepiolite with …

Sepiolite was modified with Al3+ via hydrothermal reaction. The substitution amount of Al3+ for Mg2+ and Si4+ located at sepiolite lattice and the influence of substitution amount on the structure, specific surface area, and surface acidity of Al-modified sepiolite were investigated. On this basis, indigo–sepiolite composite pigments were prepared by Al-modified sepiolite and …()|Sepiolite|63800-37-3|,, ... 130,。 ;、、、、;、、;;, …

Sepiolite Mineral Data

PE Sepiolite = 1.43 barns/electron U=PE Sepiolite x rElectron Density= 3.12 barns/cc. Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units) Sepiolite is Not Radioactive : Sepiolite Classification: Dana Class: 74.03.01b.01 Phyllosilicate Modulated LayersEffects of sepiolite on stabilization remediation of heavy ...Treatments of sepiolite were observed to reduce Cd and Pb translocation from the soil to the roots and shoots of spinach. Concentrations of Cd and Pb exhibited 12.6%–51.0% and 11.5%–46.0% reduction for the roots, respectively, and 0.9%–46.2% and 43.0%–65.8% reduction for the shoots, respectively, compared with the control group.

A facile fabrication of sepiolite mineral nanofibers with …

2019-12-4 · Sepiolite is a microfibrous 2 : 1 tri-octahedral sheet silicate mineral with an idealized half unit cell formula Mg 8 Si 12 O 30 (OH) 4 (H 2 O) 4 ·nH 2 O, which is a kind of natural mineral widely existing in nature has good sorptive, rheological, and catalytic properties due to the unique internal pore structure. 12–14 The application of .. ontiers | The Structure and Properties of Sepiolite with …Sepiolite was modified with Al3+ via hydrothermal reaction. The substitution amount of Al3+ for Mg2+ and Si4+ located at sepiolite lattice and the influence of substitution amount on the structure, specific surface area, and surface acidity of Al-modified sepiolite were investigated. On this basis, indigo–sepiolite composite pigments were prepared by Al-modified sepiolite and …

The Preparation and Properties of Porous Sepiolite Ceramics

2019-5-14 · The sintering activation energy of porous sepiolite ceramics was measured by step isothermal thermal expansion with a value of 791.42 kJ/mol in …An experimental study of sepiolite dissolution rates and …2020-2-1 · Dissolution rates of selected Ca/Mg silicates at 25 °C as a function of pH. The dashed line represents the dissolution rates of sepiolite based on Si release as obtained in this study from the citrate-free experiments at pH > 4 as well as the citrate bearing experiments at pH < 4. This figure is adapted from Schott et al. (2009).

Frontiers | Sepiolite-Hydrogels: Synthesis by Ultrasound …

2021-8-13 · Sepiolite and palygorskite fibrous clay minerals are 1D silicates featuring unique textural and structural characteristics useful in diverse applications, and in particular as rheological additives. Here we report on the ability of grinded sepiolite to generate highly viscous and stable hydrogels by sonomechanical irradiation (ultrasounds). Adequate drying of such …()|Sepiolite|63800-37-3|,, ... 130,。 ;、、、、;、、;;, …

The Preparation and Properties of Porous Sepiolite Ceramics

2019-5-14 · The sintering activation energy of porous sepiolite ceramics was measured by step isothermal thermal expansion with a value of 791.42 kJ/mol in …A facile fabrication of sepiolite mineral nanofibers with …2019-12-4 · Sepiolite is a microfibrous 2 : 1 tri-octahedral sheet silicate mineral with an idealized half unit cell formula Mg 8 Si 12 O 30 (OH) 4 (H 2 O) 4 ·nH 2 O, which is a kind of natural mineral widely existing in nature has good sorptive, rheological, and catalytic properties due to the unique internal pore structure. 12–14 The application of ...

Sepiolite | SpringerLink

2022-4-12 · 95.1 Geology. 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 range from soils to marine and lacustrine deposits, hydrothermal veins ...Treatment of environmental contamination using sepiolite: …2020-9-11 · To evaluate the potential of sepiolite-based materials to resolve environmental pollution problems, a study is needed which looks at the whole life cycle of material application, including the residual value of material classified as waste from the exploitation of sepiolite deposits in the region or from its processing and purification. This would also maximize value …

Sepiolite was considered by previous Working Groups in …

Most sepiolite fibres have a diameter below the resolution limit of the light microscope (Alvarez, 1984). Thus, the analysis of clays, soils and dusts for the presence of sepiolite may require the use of both X-ray diffraction and electron microscopy. The crystallinity of sepiolite samples may vary considerably, but the strongest line at 1.21 nm_2021-1-29 ·  (sepiolite clay), 、、, 、、。. . . . sepiolite clay. . . . 、.