Study of properties of chemically modified samples of halloysite mineral with X-ray fluorescence and X-ray powder diffraction methods

Banaś, D.; Kubala‐Kukuś, A.; Braziewicz, J.; Majewska, U.; Pajek, M.; Wudarczyk-Moćko, J.; Czech, K.; Garnuszek, Magdalena; Słomkiewicz, P. M.; Szczepanik, Beata

doi:10.1016/j.radphyschem.2013.05.028

Cited by 28 publications

(10 citation statements)

References 9 publications

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“…Halloysite has a sorption capacity for neutral molecules and ions. It contains both positively and negatively charged surfaces, and so it is capable of absorbing cations and anions [25]. It has been found that halloysite Halloysite (Figures 1b,e and 2), with the empirical formula Al 2 Si 2 O 5 (OH) 4 , chemically related to kaolin, is a naturally occurring aluminosilicate clay mineral.…”

Section: Introductionmentioning

confidence: 99%

Preparation, Characterization of Granulated Sulfur Fertilizers and Their Effects on a Sandy Soils

Lisowska

Filipek-Mazur

Sołtys³

et al. 2022

Materials

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There is a potential for using sulfur waste in agriculture. The main objective of this study was to design a granular fertilizer based on waste elemental sulfur. Humic acids and halloysite were used to improve the properties and their influence on soil properties. This is the first report on the use of proposed materials for fertilizer production. The following granular fertilizers were prepared (the percentage share of component weight is given in brackets): fertilizer A (waste sulfur (95%) + halloysite (5%)), fertilizer B (waste sulfur (81%) + halloysite (5%) + humic acids (14%)), fertilizer C (waste sulfur (50%) + halloysite (50%)) and fertilizer D (waste sulfur (46%) + halloysite (46%) + humic acids (8%)). Basic properties of the obtained granulates were determined. Furthermore, the effect of the addition of the prepared fertilizers on soil pH, electrolytic conductivity, and sulfate content was examined in a 90-day incubation experiment. Enrichment with humic acids and the higher amount of halloysite increased the fertilizer properties (especially the share of larger granules and bulk density). In addition, it stabilized soil pH and increased the sulfur content (extracted with 0.01 mol·L−1 CaCl2 and Mehlich 3) in the soil.

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Section: Introductionmentioning

confidence: 99%

Preparation, Characterization of Granulated Sulfur Fertilizers and Their Effects on a Sandy Soils

Lisowska

Filipek-Mazur

Sołtys³

et al. 2022

Materials

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“…2b) Grafting silanes via condensation between the hydrolyzed silanes and the surface hydroxyl groups of the HNTs [40] Increase the interfacial adhesion of the HNTs γ-glycidoxypropyltrimethoxysilane; 3-(trimethoxysilyl)propyl methacrylate [7,22] Surface modifier (introduce double bonds onto the surface of HNTs to form sites for polymerization) [45,46] Acid and heat activation Dehydroxylation of the structural aluminol groups: decrease of the adsorption capacity for cationic drug; HNTs becomes amorphous Structural rearrangement: changes in the pore structure and surface properties; remove the physically bounded water [18] Table II -Examples of purification, modification and functionalization process of halloysite nanotubes (HNTs).…”

Section: [Tabela I -Principais Características Físicas E Químicas Dosmentioning

confidence: 99%

Halloysite nanotubes-polymeric nanocomposites: characteristics, modifications and controlled drug delivery approaches

2017

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Halloysite nanotubes (HNTs) are aluminosilicate nanoclay mineral which have a hollow tubular structure and occurs naturally. They are biocompatible and viable carrier for inclusion of biologically active molecules due to the empty space inside the tubular structure. In this article, the HNTs main characteristics, and the HNTs-polymeric nanocomposite formation and their potential application as improvement of the mechanical performance of polymers and entrapment of hydrophilic and lipophilic substances are summarized. Recent works covering the increment of HNTs-polymeric nanocomposites and presenting promising employment of these systems as nanosized carrier, being suitable for pharmaceutical and biomedical applications, based on earlier evidence in literature of its nature to sustain the release of loaded drugs, presenting low cytotoxicity, and providing evidence for controlled drug delivery are reviewed. Keywords: nanoclay, bio-nanocomposites, functionalization, sustained drug release, nanotechnology. Resumo Nanotubos de haloisita (NTH) são nanoargilas de silicato de alumínio com estrutura naturalmente tubular. Eles são biocompatíveis e apresentam viabilidade como carreador de moléculas biologicamente ativas devido ao seu espaço interno na estrutura tubular. Neste artigo as principais características dos NTH e a obtenção de nanocompósitos poliméricos com NTH, e suas potenciais aplicações para o aperfeiçoamento das propriedades mecânicas dos polímeros

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“…The chemical composition of Hal was earlier measured by X-ray fluorescence (XRF) (Banaś et al, 2013). The nitrogen adsorption isotherm was measured at 77 K via ASAP 2020 instrument (Micrometrics, Norcross, Ga, USA), using nitrogen with 99.99% purity.…”

Section: Characteristicsmentioning

confidence: 99%

“…The example of the last method is an acid treatment which causes disaggregation of clay particles, the elimination of mineral impurities, and the dissolution of the external layers. As a result, surface area, surface activity, and pore volumes increase (Lenarda et al, 2007;Panda et al, 2010;Zhang et al, 2012;Banaś et al, 2013;Szczepanik et al, 2015). A high level of biocompatibility and low cytotoxicity of Hal made this material and its modifications also as a potential carrier for loading various drug molecules (Price et al, 2001;Levis and Deasy, 2003;Kelly et al, 2004;Veerabadran et al, 2007;Forsgren et al, 2010;Shi et al, 2011;Vergaro et al, 2012;Tan et al, 2013;Tan et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

Modified halloysite as an adsorbent for prometryn from aqueous solutions

Grabka

Raczyńska-Żak

Czech

et al. 2015

Applied Clay Science

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Study of properties of chemically modified samples of halloysite mineral with X-ray fluorescence and X-ray powder diffraction methods

Cited by 28 publications

References 9 publications

Preparation, Characterization of Granulated Sulfur Fertilizers and Their Effects on a Sandy Soils

Preparation, Characterization of Granulated Sulfur Fertilizers and Their Effects on a Sandy Soils

Halloysite nanotubes-polymeric nanocomposites: characteristics, modifications and controlled drug delivery approaches

Modified halloysite as an adsorbent for prometryn from aqueous solutions

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