Results 11 to 20 of about 3,433 (213)

On the Chemical Composition of Sepiolite and Palygorskite [PDF]

Clays and Clay Minerals, 2010
AbstractMany studies of the chemical composition of sepiolite and palygorskite have been carried out using analytical electron microscopy (AEM). According to the literature, a compositional gap exists between sepiolites and palygorskites, but the results presented here show that they may all be intermediate compositions between two extremes.
García Romero, Emilia, Súarez Barrios, Mercedes   +1 more
openaire   +6 more sources

Enhanced Viscosity of Aqueous Palygorskite Suspensions through Physical and Chemical Processing [PDF]

Advances in Materials Science and Engineering, 2015
Palygorskite has remarkable rheological properties and was used to increase the stability and viscosity of aqueous suspensions. The effects of different physical and chemical processing methods on the apparent viscosity and plastic viscosity of the ...
Feng-shan Zhou, Tian-qi Li, Yun-hua Yan, Can Cao, Lin Zhou, Yang Liu   +5 more
doaj   +2 more sources

The difference of thermal stability between Fe-substituted palygorskite and Al-rich palygorskite [PDF]

Journal of Thermal Analysis and Calorimetry, 2012
Sedimentary palygorskite (SP) and hydrothermal palygorskite (HP) were characterized by XRF, TG/DSC, and XRD. The total iron and dissociative iron in palygorskite were detected using spectrophotometry. The results showed that about 3.57 wt% of Fe2O3 was detected in SP in contrast with 0.4 wt% in HP. SP was a Fe-substituted palygorskite, and HP was an Al-
Liu, Haibo, Chen, Tianhu, Chang, Dongyin, Chen, Dong, Qing, Chengsong, Xie, Jingjing, Frost, Ray   +6 more
openaire   +3 more sources

Bentonite- and Palygorskite-Based Gels for Topical Drug Delivery Applications [PDF]

Pharmaceutics, 2023
Bentonite or palygorskite-based hydrogels have recently been suggested as a strategy to increase bioavailability and control the retention and release of therapeutic candidates.
Marco Ruggeri, Rita Sánchez-Espejo, Luca Casula, Giuseppina Sandri, Luana Perioli, Maria Cristina Cardia, Francesco Lai, César Viseras   +7 more
doaj   +4 more sources

Trioctahedral entities in palygorskite: Near-infrared evidence for sepiolite-palygorskite polysomatism [PDF]

European Journal of Mineralogy, 2011
The mixed dioctahedral-trioctahedral character of Mg-rich palygorskite has been previously described by the formula yMg5 Si8 O20(OH)2(OH2)4(1–y)[xMg2Fe2(1–x)Mg2 Al2] Si8 O20(OH)2(OH2)4, where y is the trioctahedral fraction of this two-chain ribbon mineral with an experimentally determined upper limit of y 0.5 and x is the FeIII content in the M2 sites
Stathopoulou, Elizabeth T., Súarez Barrios, Mercedes, García Romero, Emilia, Sánchez del Río, Manuel, Kacandes, Georges H., Gionis, Vassilis, Chryssikos, Georgios D.   +6 more
core   +6 more sources

A Biotechnological Approach to Enzyme-Based Fertilisers: Immobilisation of Acid Phosphatases. [PDF]

Microb Biotechnol
The immobilization performance of M2‐32 varied with clay type, with palygorskite providing the highest catalytic reaction and stability. After immobilization, the enzyme preserved its broad pH and temperature tolerance. Neither the free nor the immobilized protein produced measurable changes in the rhizosphere microbial diversity.
Recio MI, de la Torre J, Rocha-Martin J, de la Mata I, Ramos JL.   +4 more
europepmc   +2 more sources

Paleoenvironmental Stasis for the Bioturbating Community During the Paleocene-Eocene Thermal Maximum at the Southern Iberian Margin. [PDF]

Geobiology
ABSTRACT During the Paleocene‐Eocene Thermal Maximum (PETM), there was an increase in global temperatures and emissions of isotopically depleted carbon, resulting in a negative carbon isotope excursion (CIE). This climatic event caused a widespread ocean deoxygenation, leading to substantial biotic turnover.
Miguez-Salas O, Rodríguez-Tovar FJ, Pujalte V.   +2 more
europepmc   +2 more sources

Clays for Low-Carbon Cements: Overview, Progress, and Challenges. [PDF]

Glob Chall
This review provides a critical overview of recent developments of activated clays to function as artificial pozzolans. After a thorough description of the clays that yield good pozzolanic performances, selected examples are given on thermal and mechanical activations. Chiefly, general correlations are extracted from reported data despite its scattered
Koufany I, Santacruz I, De la Torre AG, Rodríguez-Ruiz MD, Aranda MAG.   +4 more
europepmc   +2 more sources

Incorporation of Different Metal Ion for Tuning Color and Enhancing Antioxidant Activity of Curcumin/Palygorskite Hybrid Materials

Frontiers in Chemistry, 2021
Curcumin is one of the dietary dyes extracted from turmeric and used for prevention and treatment of various illnesses. However, the low bioavailability and poor stability of curcumin limits its relevant applications.
Shue Li, Shue Li, Bin Mu, Penji Yan, Yuru Kang, Qin Wang, Aiqin Wang   +6 more
doaj   +1 more source

Impact of Surface Roughness on Partition and Selectivity of Ionic Liquids Mixture in Porous Electrode

Nanomaterials, 2022
Understanding the influence of surface roughness on the adsorption of ions from an ionic liquids (ILs) mixture is essential for designing supercapacitors.
Gulou Shen, Haoguang Yang, Yongke Hu, Xiaojie Zhang, Feng Zhou, Huaju Li, Kun Hong   +6 more
doaj   +1 more source