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Journal articles on the topic 'Organic zeolites'

Author: Grafiati

Published: 9 March 2023

Last updated: 31 July 2025

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1

Nursanti, Ida, and Nida Kemala. "Peranan Zeolit dalam Peningkatan Kesuburan Tanah Pasca Penambangan." Jurnal Media Pertanian 4, no. 2 (2019): 88. http://dx.doi.org/10.33087/jagro.v4i2.84.

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ABSTRACTPost-mining soils have poor chemical and physical properties and have very low fertility rates. The study aims to determine the best dose of zeolite in order to improve soil fertility after mining as a planting medium. The experiment was carried out experimentally by giving zeolites (Z) and 3 treatment levels, namely: Z0 = without zeolites, Z1 = zeolites 100 g, Z2 = zeolites 200 g. There were 3 replications, so 9 unit experiments were obtained. The final analysis of research on soil chemistry consists of; Available P, total N, K-exs, C-organic and CEC, pH. Data analysis of the diversit

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2

Asgar Pour, Zahra, and Khaled O. Sebakhy. "A Review on the Effects of Organic Structure-Directing Agents on the Hydrothermal Synthesis and Physicochemical Properties of Zeolites." Chemistry 4, no. 2 (2022): 431–46. http://dx.doi.org/10.3390/chemistry4020032.

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The study on the synthesis of zeolites, including both the development of novel techniques of synthesis and the discovery of new zeolitic frameworks, has a background of several decades. In this context, the application of organic structure-directing agents (SDAs) is one of the key factors having an important role in the formation of porous zeolitic networks as well as the crystallization process of zeolites. There are various elements that are needed to be explored for elucidating the effects of organic SDAs on the final physicochemical properties of zeolites. Although SDAs were firstly used

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3

Qiu, Liyan, Patricia A. Laws, Bi-Zeng Zhan, and Mary Anne White. "Thermodynamic investigations of zeolites NaX and NaY." Canadian Journal of Chemistry 84, no. 2 (2006): 134–39. http://dx.doi.org/10.1139/v05-244.

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Understanding of the thermodynamic stability of zeolites is important in the prediction of thermodynamic equilibrium. Therefore, we have undertaken an investigation of the thermodynamic stability of the zeolites NaX and NaY through heat capacity measurements from ca. 30 to 300 K. No phase transitions were observed, and zeolite NaX does not show a significant particle size effect when the particle size is reduced to ca. 30 nm. The results show that the specific heat capacity increases with the Al content in the zeolite. Both NaX and NaY are found to be thermodynamically stable with respect to t

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4

Gackowski, Mariusz, Jerzy Podobiński, Ewa Broclawik, and Jerzy Datka. "IR and NMR Studies of the Status of Al and Acid Sites in Desilicated Zeolite Y." Molecules 25, no. 1 (2019): 31. http://dx.doi.org/10.3390/molecules25010031.

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The desilication of zeolite Y (of Si/Al = 31) that was previously dealuminated by steaming and acid treatment was studied. Desilication of zeolites of high Si/Al module in alkali solutions extracts both Si and Al from zeolite crystals, but while Si remains in solution, Al is reinserted into the zeolite grain. The main goal of our study was to follow the status of Al reinserted into zeolite during the desilication procedure, and its role in the formation of acid sites of the Brønsted and Lewis types. The properties of Al were followed by 27Al MAS NMR spectroscopy (for parent samples and zeolite

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5

Nuhu, A. A., Z. N. Garba, H. Ibrahim, and S. Abdulrazak. "Physicochemical Characterization of Zeolite Materials Produced from Selected Low-Cost Agricultural Wastes." Journal of Applied Sciences and Environmental Management 28, no. 3 (2024): 675–80. http://dx.doi.org/10.4314/jasem.v28i3.7.

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Zeolites play a crucial role in adsorption processes for eliminating pollutants from industrial effluents and are extensively utilized in catalytic activities across diverse syntheses. This study focused on the conversion of three agricultural wastes—corncob, groundnut shell, and sugarcane bagasse—into zeolitic materials through three analytical methods: hydrothermal, microwave sintering, and alkali fusion, respectively. Standard methods were employed to assess the physicochemical parameters of the resulting zeolites. Generally, the produced zeolites had excellent surface areas and porosities.

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6

Erofeev, Vladimir I., Sofiya N. Dzhalilova, Mikhail V. Erofeev, Vasilii S. Ripenko, and Vladimir P. Reschetilowski. "Conversion of the Propane–Butane Fraction into Arenes on MFI Zeolites Modified by Zinc Oxide and Activated by Low-Temperature Plasma." Molecules 25, no. 11 (2020): 2704. http://dx.doi.org/10.3390/molecules25112704.

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The effect of modification of MFI zeolite 1–5 wt.% ZnO activated by plasma on acid and catalytic properties in the conversion of the propane–butane fraction into arenes was investigated. The high-silica zeolites with silicate module 45 were synthesized from alkaline alumina–silica gels in the presence of an ‘X-oil’ organic structure-forming additive. The modification of the zeolite with zinc was carried out by impregnating the zeolite granules in the H-form with an aqueous solution of Zn(NO3)2. The obtained zeolites were characterized by X-ray phase analysis and IR spectroscopy. It is shown th

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7

Asefa, Misikir Tamiru, and Gebisa Bekele Feyisa. "Comparative Investigation on Two Synthesizing Methods of Zeolites for Removal of Methylene Blue from Aqueous Solution." International Journal of Chemical Engineering 2022 (February 12, 2022): 1–12. http://dx.doi.org/10.1155/2022/9378712.

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Organic dyes discharged from industries have significant effect on ecosystem and health of human being because of their toxicity and appearing colour in the wastewater. Absorption method is a more preferable method than other wastewater treatment methods due to its characteristics of being eco-friendly, simple, and efficient. Zeolites are among the porous materials often used as absorbent of organic dye from wastewater. However, wide use of zeolite has been limited due to its expensive precursors and synthesized methods (i.e., hydrothermal method which needs expensive autoclave). In this work,

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8

Behin, Jamshid, Elmira Ghadamnan, and Hossein Kazemian. "Recent advances in the science and technology of natural zeolites in Iran." Clay Minerals 54, no. 2 (2019): 131–44. http://dx.doi.org/10.1180/clm.2019.19.

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AbstractIran has significant deposits of high-purity natural zeolites. Many Iranian scholars conduct scientific research on porous materials, from natural and synthetic zeolites to metal organic framework materials. Iranian zeolite deposits and associated research are reviewed here. Various industrial applications of natural zeolites, from agriculture to animal husbandry to the construction industry and beyond are discussed here.

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9

Cadar, Oana, Marin Senila, Maria-Alexandra Hoaghia, Daniela Scurtu, Ion Miu, and Erika Andrea Levei. "Effects of Thermal Treatment on Natural Clinoptilolite-Rich Zeolite Behavior in Simulated Biological Fluids." Molecules 25, no. 11 (2020): 2570. http://dx.doi.org/10.3390/molecules25112570.

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This study presents the effect of thermal treatment (450, 500, 600, 750, and 800 °C) on a Romanian clinoptilolite-rich natural zeolite, along with the interaction of raw and thermally treated zeolites with simulated gastric fluid (SGF, pH = 1.20) at different zeolite to SGF ratios and exposure times. The zeolites were characterized using gravimetric analysis, X-ray fluorescence, powder X-ray diffraction (pXRD), and Fourier transform infrared (FT-IR) spectroscopy. The chemical composition of the zeolite subjected to thermal treatment did not change significantly with the increase of temperature

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10

Li, Jian, Zihao Rei Gao, Qing-Fang Lin, et al. "A 3D extra-large-pore zeolite enabled by 1D-to-3D topotactic condensation of a chain silicate." Science 379, no. 6629 (2023): 283–87. http://dx.doi.org/10.1126/science.ade1771.

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Zeolites are microporous silicates with a large variety of applications as catalysts, adsorbents, and cation exchangers. Stable silica-based zeolites with increased porosity are in demand to allow adsorption and processing of large molecules but challenge our synthetic ability. We report a new, highly stable pure silica zeolite called ZEO-3, which has a multidimensional, interconnected system of extra-large pores open through windows made by 16 and 14 silicate tetrahedra, the least dense polymorph of silica known so far. This zeolite was formed by an unprecedented one-dimensional to three-dime

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11

Azizi, Seyed Naser, Akram Alavi Daghigh, and Maryam Abrishamkar. "Phase Transformation of Zeolite P to Y and Analcime Zeolites due to Changing the Time and Temperature." Journal of Spectroscopy 2013 (2013): 1–5. http://dx.doi.org/10.1155/2013/428216.

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In the present study, the synthesis of template free zeolite P under hydrothermal condition was investigated. The effects of parameters such as Si/Al ratios (3–45), crystallization temperatures (80–160°C), and cry (40–60 h) on the synthesis of zeolite P were studied. The phase transformation of zeolite P to two types of high crystallinity Y and analcime zeolites due to change of temperature was observed. The effect of temperature on the achievement of two different zeolite types (Y and analcime) with a constant initial synthetic composition under organic free synthesis of zeolite P was studied

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12

Jovanović, V., V. Dondur, Lj Damjanović, J. Zakrzewska, and M. Tomašević-Čanović. "Improved Materials for Environmental Application: Surfactant-Modified Zeolites." Materials Science Forum 518 (July 2006): 223–28. http://dx.doi.org/10.4028/www.scientific.net/msf.518.223.

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The surface properties of zeolites A, X, Y and natural zeolite clinoptilolite (CLI) functionalized by cationic surfactants were investigated. The quaternary ammonium type surfactants, such as hexadecyltrimethylammonium (HDTMA) chloride, stearildimethylbenzylammonium (SDMBA) chloride and distearildimethylammonium (DSDMA) chloride, replaced inorganic cations like Na+ and Ca2+ on the external surface of zeolites. The adsorption capacities of all organic cations followed the order of CLI>CaY>CaX>CaA>NaY>NaX>NaA and increased with the increase of Si/Al molar ratio in zeolite struc

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13

Król, Magdalena, Andrzej Koleżyński, and Włodzimierz Mozgawa. "Vibrational Spectra of Zeolite Y as a Function of Ion Exchange." Molecules 26, no. 2 (2021): 342. http://dx.doi.org/10.3390/molecules26020342.

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Zeolite Y is one of the earliest known and most widely used synthetic zeolites. Many experimental investigations verify the valuable ion exchange capability of this zeolite. In this study, we assessed the effects of ion exchange on its vibrational spectra. We applied classical lattice dynamics methods for IR and Raman intensity calculations. Computed spectra of optimized zeolite Y structures with different cations were compared with experimental data. The spectra obtained in this study are in agreement with previous experimental and computational studies on zeolites from the faujasite group.

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14

Zhu, Longfeng, Jian Zhang, Liang Wang, et al. "Solvent-free synthesis of titanosilicate zeolites." Journal of Materials Chemistry A 3, no. 27 (2015): 14093–95. http://dx.doi.org/10.1039/c5ta02680f.

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Titanosilicate zeolites with MFI and *BEA structures are successfully synthesized using raw materials of fumed silica, titanium sulfate, organic templates, and zeolite seeds in the absence of solvents.

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15

Mu, Y., H. Shi, Y. Wang, H. Ding, and J. Li. "CNDs@zeolite: new room-temperature phosphorescent materials derived by pyrolysis of organo-templated zeolites." J. Mater. Chem. C 5, no. 41 (2017): 10894–99. http://dx.doi.org/10.1039/c7tc03487c.

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16

Dai, Shujie, Yichang Yang, Jinghuai Yang, Shichang Chen, and Longfeng Zhu. "Recent Advances in the Seed-Directed Synthesis of Zeolites without Addition of Organic Templates." Nanomaterials 12, no. 16 (2022): 2873. http://dx.doi.org/10.3390/nano12162873.

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Zeolites have been widely employed in fields of petroleum refining, fine chemicals and environmental protection, but their syntheses are always performed in the presence of organic templates, which have many drawbacks such as high cost and polluted wastes. In recent years, the seed-directed synthesis of zeolites has been paid much attention due to its low-cost and environmentally friendly features. In this review, the seed-directed synthesis of Al-rich zeolites with homonuclear and heteronuclear features, the seed-directed synthesis of Si-rich zeolites assisted with ethanol and the utility of

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17

Netzsch, Philip, Romy Ettlinger, and Russell E. Morris. "Controllable surfactant-directed zeolitic-imidazolate-8 growth on swollen 2D zeolites." APL Materials 11, no. 3 (2023): 031115. http://dx.doi.org/10.1063/5.0139673.

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To meet society’s need for more and more specialized materials, this work focuses on the preparation of porous metal–organic framework (MOF)–zeolite hybrid materials based on two 2D zeolites, namely, IPC-1P (Institute of Physical Chemistry - 1 Precursor) and the metal–organic framework ZIF-8 (Zeolitic Imidazolate Framework-8). Using the previously well-established assembly–disassembly–organization–reassembly method, the zeolite was (i) synthesized, (ii) hydrolyzed to a layered zeolite, (iii) the interlayer distance was increased using the swelling agent cetyltrimethylammonium chloride, and (iv

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18

Tung, Chen-Ho, Li-Zhu Wu, Li-Ping Zhang, et al. "Microreactor-controlled selectivity in organic photochemical reactions." Pure and Applied Chemistry 72, no. 12 (2000): 2289–98. http://dx.doi.org/10.1351/pac200072122289.

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Molecular-sieve zeolites, Nafion membranes, low-density polyethylene films, and mixed surfactant vesicles have been used as microreactors to carry out organic photochemical reactions. The photo-cycloadditions of diaryl compounds with long flexible chains included in NaY zeolite or low-density polyethylene films yield intramolecular photocyclomers to the exclusion of intermolecular products. The photosensitized oxidation of alkenes included in pentasil zeolites or Nafion membranes or vesicles can be directed selectively toward either the singlet oxygen-mediated or the superoxide radical anion-m

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19

Dang, Long Van, Thu Thi Minh Nguyen, Dang Van Do, Son Thanh Le, Trong Dinh Pham, and Anh Thi Mai Le. "Study on the Synthesis of Chabazite Zeolites via Interzeolite Conversion of Faujasites." Journal of Analytical Methods in Chemistry 2021 (March 29, 2021): 1–10. http://dx.doi.org/10.1155/2021/5554568.

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The interzeolite conversion of faujasite (FAU-type) zeolites to chabazite (CHA-type) zeolite in the presence of N,N,N-trimethyladamantammonium and N,N,N-dimethylethylcyclohexylammonium cations was investigated over a large compositional range by carefully controlling the reaction mixture compositions. Highly crystalline CHA zeolites were also obtained by the transformation of several zeolite types including EMT, LTL, LEV, RTH, and MFI frameworks. The formation of CHA zeolite from FAU zeolite precursors was substantially faster than that from zeolite L with a similar composition. High-silica CH

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20

Gackowski, Mariusz, and Jerzy Datka. "Acid Properties of Hierarchical Zeolites Y." Molecules 25, no. 5 (2020): 1044. http://dx.doi.org/10.3390/molecules25051044.

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The article reviews different strategies towards obtaining mesoporous zeolites Y: desilication; surfactant templating and assembly of zeolite crystals. The impact of those methods on physicochemical properties is covered, with a special focus on the acidity of the samples measured with infrared (IR) spectroscopy. The methods of characterization of acidity are presented. Quaternary ammonium cations used for desilication lead to obtaining crystalline; mesoporous and highly acidic zeolites. Si-OH-Al groups of extremely high acidity can be produced by calcination in a humid atmosphere. When the co

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21

Barros, Thiago Rodrigo Barbosa, Thianne Silva Batista Barbosa, and Meiry Gláucia Freire Rodrigues. "Adsorption of reactive yellow BF-3R dye by CTABr modified zeolite NaY." Research, Society and Development 10, no. 14 (2021): e323101422147. http://dx.doi.org/10.33448/rsd-v10i14.22147.

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Textile industries generate effluents composed of organic salts and complexes from dyes not fixed on fabrics, or not degraded by the inefficiency of conventional treatment processes, which represents a high potential for environmental impact due to inadequate disposal of the generated effluent. Zeolites are porous materials that have a three-dimensional structure containing tetrahedrals of AlO4 e SiO4 which can be modified to improve its properties. The adsorption process using zeolites as adsorbents can be considered an excellent economic physical treatment to solve or minimize such a problem

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22

Turan, Abdullah Zahid, and Mustafa Turan. "A review on the application of nanoporous zeolite for sanitary landfill leachate treatment." Water Science and Technology 84, no. 12 (2021): 3425–41. http://dx.doi.org/10.2166/wst.2021.468.

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Abstract This review deals with low-cost nanoporous zeolites for the treatment of sanitary landfill leachate. Organic contaminants and ammoniacal nitrogen are significant parameters in landfill leachate treatment. Adsorption processes are regarded as promising alternative treatment options in this respect. Zeolites are aluminosilicate materials that are widely used in separation, ﬁltration, adsorption and catalysis. Natural zeolite is a low-cost and readily available form of zeolite and is a promising candidate to be used as an ion-exchange material for ammonia and other inorganic pollutant re

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23

Li, Shaojie, Shilong Jia, Tetsuya Nagasaka, Hao Bai, and Liyun Yang. "CO2 Adsorption Properties of Amine-Modified Zeolites Synthesized Using Different Types of Solid Waste." Sustainability 15, no. 13 (2023): 10144. http://dx.doi.org/10.3390/su151310144.

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In this study, organic amines were used to modify zeolite NaA and analcime synthesized using fly ash and iron tailing slag as raw materials, respectively, and the adsorption properties of the modified zeolites toward CO2 were determined. We found that when tetraethylenepentamine (TEPA) was used, the modified zeolite NaA and analcime had the highest nitrogen content. The adsorption capacity of the modified zeolite NaA for CO2 was 4.02 mmol/g and that of the modified analcime was 1.16 mmol/g when the adsorption temperature was 70 °C and the CO2 flow rate was 50 mL/min. According to the adsorptio

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24

Mio, Matthew J., and Jeffrey S. Moore. "Supramolecular Aufbau: Folded Polymers as Building Blocks for Adaptive Organic Materials." MRS Bulletin 25, no. 4 (2000): 36–41. http://dx.doi.org/10.1557/mrs2000.27.

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The design of inorganic and organic solids with novel structures and properties has long been the object of materials research. The classical examples of porous materials (i.e., involving reversible guest passage) are zeolites. First discovered in the mid-1700s, zeolites are hydrated, crystalline aluminosilicates that organize into stable, discrete frameworks. Basic structures employ tetrahedral atoms (silicon or aluminum) bridged by oxygen atoms, where each oxygen is shared between two metalloid tetrahedra. Resulting covalent lattices can be neutral or negatively charged (as a result of bridg

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25

Ramamurthy. "Achiral Zeolites as Reaction Media for Chiral Photochemistry." Molecules 24, no. 19 (2019): 3570. http://dx.doi.org/10.3390/molecules24193570.

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Obtaining enantiomerically-enriched photoproducts from achiral reactants has been a long-sought goal. The various methods developed to achieve chiral induction in photoproducts during the last fifty years still suffer from a lack of predictability, generality, and simplicity. With the current emphasis on green chemistry, obtaining enantiomerically enriched products via photochemistry is a likely viable alternative for the future. Of the various approaches developed during the last three decades, the one pioneered in the author’s laboratory involved the use of commercially-available and inexpen

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26

Lim, Hyung Mi, Ji Sook Jung, Bong Young Kim, and Seung Ho Lee. "Application of Zeolites on Cellulose Fiber." Key Engineering Materials 317-318 (August 2006): 777–80. http://dx.doi.org/10.4028/www.scientific.net/kem.317-318.777.

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Zeolites with different sizes and structures were applied on the surface of cellulose fibers with organic and inorganic binders. The effects of zeolite structure and size and choice of binder on the deodorization rate have been studied. The smaller the particle size, the more effective the deodorization rate of both the zeolite coated cellulose fibers and the powder itself. The deodorization rate depends on both the type and amount of inorganic binder. A silica based inorganic binder revealed higher efficiency on deodorization than silicate based inorganic binder and also higher than organic b

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27

Martinez-Ortigosa, Joaquin, Jorge Simancas, Jose A. Vidal-Moya, Fernando Rey, Susana Valencia, and Teresa Blasco. "A Multi-Nuclear MAS-NMR Study on the Structural Properties of Silicalite-1 Zeolite Synthesized Using N- and P-Based Organic Structure Directing Agents." Applied Sciences 11, no. 15 (2021): 6850. http://dx.doi.org/10.3390/app11156850.

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The nature of organic structure directing agents (OSDAs) is of paramount importance in the final properties of zeolites, particularly the framework and porosity. Recently, the use of P-containing OSDAs has been employed for new zeolites, but there is little discussion compared to their analogues N-OSDAs. The main objective of this work is the characterization of pure silica MFI zeolite (silicalite-1) prepared by the dual-template route with tetrapropylammonium (TPA), tetrapropylphosphonium (TPP) cations, and mixtures thereof aiming to understand by advanced NMR methods how the nature of the or

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28

Vassilina, T. K., A. M. Balgabaev, A. M. Shibikeуeva, Е. S. Abyldayev, and А. Zakiyeva. "Effectiveness of use of zeolite in vegetable growing in the footdown zone of southeast Kazakhstan." Pochvovedenie i agrokhimiya, no. 3 (October 9, 2024): 63–72. https://doi.org/10.51886/1999-740x_2024_3_62.

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Effectiveness of use of zeolite in vegetable growing in the footdown zone of southeast Kazakhstan Natural zeolites are widely used in agriculture both as independent fertilizers and as part of mixtures of mineral and organic fertilizers. Natural zeolites are crystalline nanoporous hydrated aluminosilicates. A modified zeolite fertilizer of prolonged action, enriched with macro- and microelements, was obtained by chemical and thermal Treatment of zeolite from the Shankanai deposit with ammophos dispersed to nanoscale sizes. The morphology and elemental composition of the new fertilizer were stu

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Kuterasiński, Łukasz, Jerzy Podobiński, Dorota Rutkowska-Zbik, and Jerzy Datka. "IR Studies of the Cu Ions in Cu-Faujasites." Molecules 24, no. 23 (2019): 4250. http://dx.doi.org/10.3390/molecules24234250.

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The properties of Cu ions in dealuminated faujasite-type zeolites (Si/Al = 31) containing 1, 2, and 5 wt.% of Cu were investigated by IR spectroscopy with CO and NO as probe molecules. Cu was introduced by impregnation into zeolites in both protonic (HFAU) and sodium (NaFAU) forms of zeolite. Four kinds of Cu species were found: Cu+exch., Cu+oxide, Cu2+exch. (square, planar, and square pyramidal), and Cu2+oxide (CuO). The proportions between these four kinds of Cu depended on the amount of Cu and on the form of zeolite to which Cu was introduced (HFAU or NaFAU). Zeolites with 1 wt.% of Cu intr

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Pan, Junyao, Binyu Wang, Simiao Liu, Shanshan Liu, and Wenfu Yan. "Synthesis and Application of LTA Zeolite for the Removal of Inorganic and Organic Hazardous Substances from Water: A Review." Molecules 30, no. 3 (2025): 554. https://doi.org/10.3390/molecules30030554.

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Industrialization and human activities have caused significant environmental challenges, with water pollution posing severe risks to human health. This underscores the urgent need for effective water treatment solutions. Zeolites, known for their high specific surface area and stability, have gained increasing attention as adsorbents for water treatment. Among zeolites, LTA varieties stand out due to their low Si/Al ratio, which enhances ion-exchange capacity, and their cost-effectiveness. This review focuses on the synthesis of low-silica LTA zeolites, particularly zeolite A, using natural ma

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Nearchou, Antony, Catherine Dejoie, Paul R. Raithby, and Asel Sartbaeva. "The Structure and Location of 18-Crown-6 Ether in Zeolites RHO and ZK-5." Chemistry 4, no. 1 (2022): 168–84. http://dx.doi.org/10.3390/chemistry4010015.

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The use of organic additives presents the greatest versatility and control of zeolite synthesis in order to prepare novel architectures for desired applications. Despite this prospect, there is little clarity of how organic additives are involved in framework assembly and the range of behaviours that are available. To address this issue, we have considered zeolites RHO and ZK-5 which can both be prepared using 18-crown-6 ether as an additive. Previously, this additive has shown to employ different structure directing behaviours to assemble a variety of zeolites. We have used high resolution po

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32

Stosic, Dusan, and Vladimir Zholobenko. "Application of Zeolite-Based Materials for Chemical Sensing of VOCs." Sensors 25, no. 5 (2025): 1634. https://doi.org/10.3390/s25051634.

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Considerable levels of pollution produced by urbanization and industrial development have established a need for monitoring the presence of harmful compounds and the assessment of environmental risks to provide a basis for timely reaction and the prevention of disastrous consequences. Chemical sensors offer a reasonable solution; however, the desired properties, such as high sensitivity, selectivity, stability and reliability, ease of fabrication, and cost-effectiveness, are not always easily met. To this end, the incorporation of zeolites in sensor materials has attracted considerable attenti

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33

Cataldo, Eleonora, Linda Salvi, Sofia Sbraci, et al. "Zeowine: The synergy of zeolite and compost. Effects on the physiology of the vine and on the quality of the grapes." BIO Web of Conferences 44 (2022): 02002. http://dx.doi.org/10.1051/bioconf/20224402002.

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The trial aims to improve the protection and management of the soil, the well-being of the plant and the quality of production in the wine supply chain organic and biodynamic, using an innovative product “ZEOWINE” resulting from the composting of waste of the wine and zeolite supply chain. At present, the use of zeolites in agriculture is a fast-spreading practice; their application to soils (both as natural zeolites and in combination with organic and mineral fertilizers) not only increases production but also leads to the exaltation of quality indices. The research was conducted in the 2019

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Yang, Hu, Zhenghua Ping, Yingcai Long, and Quang Trong Nguyen. "Article." Canadian Journal of Chemistry 77, no. 10 (1999): 1671–77. http://dx.doi.org/10.1139/v99-197.

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Two types of hydrophobic zeolites Y were prepared by treating the NaY-type zeolite with SiCl4, with or without subsequent hydrothermal treatment. X-ray diffraction analysis showed that the framework of the two modified zeolites Y are more perfect than that of the NaY one, and the Si/Al ratio is greatly enhanced by hydrothermal treatment. The determined sorption isotherms indicate an improvement of the ester-to-water sorption ratio with the increase in Si/Al ratio. When the zeolite-filled silicone membranes are used in separation of ethyl acetate - water mixture by pervaporation, both the total

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Khivantsev, Konstantin, Nicholas R. Jaegers, Libor Kovarik, Miroslaw A. Derewinski, Ja-Hun Kwak, and Janos Szanyi. "On the Nature of Extra-Framework Aluminum Species and Improved Catalytic Properties in Steamed Zeolites." Molecules 27, no. 7 (2022): 2352. http://dx.doi.org/10.3390/molecules27072352.

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Steamed zeolites exhibit improved catalytic properties for hydrocarbon activation (alkane cracking and dehydrogenation). The nature of this practically important phenomenon has remained a mystery for the last six decades and was suggested to be related to the increased strength of zeolitic Bronsted acid sites after dealumination. We now utilize state-of-the-art infrared spectroscopy measurements and prove that during steaming, aluminum oxide clusters evolve (due to hydrolysis of Al out of framework positions with the following clustering) in the zeolitic micropores with properties very similar

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Samara, Fatin, Amer A. Al Abdel Hamid, Venkatesh Gopal, Lara Dronjak, Fares Feghaly, and Sofian Kanan. "Modified Zeolites for the Removal of Emerging Bio-Resistive Pollutants in Water Resources." Catalysts 15, no. 2 (2025): 138. https://doi.org/10.3390/catal15020138.

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The increasing presence of pollutants, including pharmaceuticals and pesticides, in water resources necessitates the development of effective remediation technologies. Zeolites are promising agents for pollutant removal due to their high surface area, ion-exchange capacity, natural abundance, and diverse tailorable porous structures. This review focuses on the efficient application of modified zeolites and mesoporous materials as photocatalysts and adsorbents for removing contaminants from water bodies. The adsorption and photodegradation of pesticides and selected non-steroidal anti-inflammat

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O'Neill, Melanie A., and Frances L. Cozens. "Influence of alkali metal cations on the photoheterolysis of 9-cyclopropyl-9-fluorenol and the reactivity of the 9-cyclopropyl-9-fluorenyl cation in non-acidic zeolites." Canadian Journal of Chemistry 81, no. 6 (2003): 647–59. http://dx.doi.org/10.1139/v03-071.

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Alkali metal cation regulation of carbocation formation and reactivity in non-acidic zeolites is probed using the photoheterolysis reaction of 9-cyclopropyl-9-fluorenol. Nanosecond time-resolved diffuse reflectance is employed to directly observe the 9-cyclopropyl-9-fluorenyl cation as a transient species within the non-acidic zeolites. The efficiency of carbocation formation via photoheterolysis and the dynamics of other reaction pathways available to photoexcited 9-cyclopropyl-9-fluorenol are found to be strongly dependent on the zeolite alkali metal counterion. In particular, the yield of c

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Xu, Hao, Jie Zhu, Longfeng Zhu, Enmu Zhou, and Chao Shen. "Advances in the Synthesis of Ferrierite Zeolite." Molecules 25, no. 16 (2020): 3722. http://dx.doi.org/10.3390/molecules25163722.

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As one of the most important porous materials, zeolites with intricate micropores have been widely employed as catalysts for decades due to their large pore volume, high surface area, and good thermal and hydrothermal stabilities. Among them, ferrierite (FER) zeolite with a two-dimensional micropore structure is an excellent heterogeneous catalyst for isomerization, carbonylation, cracking, and so on. In the past years, considering the important industrial application of FER zeolite, great efforts have been made to improve the synthesis of FER zeolite and thus decrease the synthesis cost and e

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Moliner, Manuel. "Direct Synthesis of Functional Zeolitic Materials." ISRN Materials Science 2012 (November 29, 2012): 1–24. http://dx.doi.org/10.5402/2012/789525.

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Recently, the direct synthesis of zeolitic materials has received much attention because several well-defined functionalities have been introduced in those materials by “one-pot” methodologies. The rationalization of the physics and chemistry of the processes involved in the zeolite growth has allowed the direct preparation of different functional molecular sieves with unique properties and potential applicability in industry. In the present paper, the “one-pot” preparations of metal-containing zeolites (both in framework and extra-framework positions), hybrid organic-inorganic molecular sieve

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Mastinu, Kumar, Maccarinelli, et al. "Zeolite Clinoptilolite: Therapeutic Virtues of an Ancient Mineral." Molecules 24, no. 8 (2019): 1517. http://dx.doi.org/10.3390/molecules24081517.

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Zeolites are porous minerals with high absorbency and ion-exchange capacity. Their molecular structure is a dense network of AlO4 and SiO4 that generates cavities where water and other polar molecules or ions are inserted/exchanged. Even though there are several synthetic or natural occurring species of zeolites, the most widespread and studied is the naturally occurring zeolite clinoptilolite (ZC). ZC is an excellent detoxifying, antioxidant and anti-inflammatory agent. As a result, it is been used in many industrial applications ranging from environmental remediation to oral applications/sup

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Mlekodaj, Kinga, Joanna E. Olszowka, Venceslava Tokarova, et al. "Effect of Alkali-Free Synthesis and Post-Synthetic Treatment on Acid Sites in Beta Zeolites." Molecules 25, no. 15 (2020): 3434. http://dx.doi.org/10.3390/molecules25153434.

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Beta zeolites with Si/Al around 14 were prepared using three new alkali-free synthesis methods based on the application of amorphous aluminosilicate precursor and calcined in ammonia or air. All samples exhibit structural and textural properties of standard beta zeolite. Comprehensive study by 27Al and 29Si MAS NMR, together with FTIR adsorption of d3-acetonitrile and pyridine were used to characterize the influence of both the synthesis and calcination procedure on the framework Al atoms and related Brønsted and Lewis acid sites. While calcination in ammonia preserves all framework Al atoms,

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Souza, Iane M. S., Fátima García-Villén, César Viseras, and Sibele B. C. Perger. "Zeolites as Ingredients of Medicinal Products." Pharmaceutics 15, no. 5 (2023): 1352. http://dx.doi.org/10.3390/pharmaceutics15051352.

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Development of new medicinal products for particular therapeutic treatment or for better manipulations with better quality and less side effects are possible as a result of advanced inorganic and organic materials application, among which zeolites, due to their properties and versatility, have been gaining attention. This paper is an overview of the development in the use of zeolite materials and their composites and modifications as medicinal products for several purposes such as active agents, carriers, for topical treatments, oral formulations, anticancer, the composition of theragnostic sy

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Cintoli, R., B. Di Sabatino, L. Galeotti, and G. Bruno. "Ammonium uptake by zeolite and treatment in UASB reactor of piggery wastewater." Water Science and Technology 32, no. 12 (1995): 73–81. http://dx.doi.org/10.2166/wst.1995.0461.

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A treatment plant of pre-screened piggery wastewater is tested at lab-scale using Italian zeolites (of very low cost) to strongly reduce the NH4+ from 1500 mg/l to 300–400 mg/l and anaerobic digestion in UASB and UASB-AF reactors to remove organics. The ion-exchange pre-treatment by zeolite leads to a reduction of toxicity of wastewater towards anaerobic microbial population and improves the UASB and UASB-AF reactors yields in organics reduction and gas production. The laboratory plant in this configuration reaches a COD removal range of 60–80% and a good reduction of effluent nutrients concen

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Nasser, Galal A., Haruna Adamu, Akolade I. Bakare, et al. "Conversion of NOx over Aluminosilicate Cu-CHA Zeolite Catalysts Synthesized Free of Organic Structure-Directing Agents." Applied Sciences 13, no. 24 (2023): 13001. http://dx.doi.org/10.3390/app132413001.

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Cu-CHA zeolites have proven to be effective for NOx reduction, but a drawback in using CHA zeolites is the cost associated with using expensive organic structure-directing agents. To overcome this drawback, we are reporting here the synthesis of Cu-CHA zeolite catalysts in both their NH4-form as well as K-form that do not require the use of organic structure-directing agents. After comprehensive characterization by XRF, XRD, 27Al NMR spectroscopy, FE-SEM, SEM/EDS, N2-adsorption/desorption, NH3-TPD, H2-TPR, and XPS, the zeolite catalysts were tested for NOx conversion by NH3-selective catalytic

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Nearchou, Antony, Mero-Lee U. Cornelius, Zöe L. Jones, et al. "Pressure-induced symmetry changes in body-centred cubic zeolites." Royal Society Open Science 6, no. 7 (2019): 182158. http://dx.doi.org/10.1098/rsos.182158.

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Previous work has shown a strong correlation between zeolite framework flexibility and the nature of structural symmetry and phase transitions. However, there is little experimental data regarding this relationship, in addition to how flexibility can be connected to the synthesis of these open-framework materials. This is of interest for the synthesis of novel zeolites, which require organic additives to permutate the resulting geometry and symmetry of the framework. Here, we have used high-pressure powder X-ray diffraction to study the three zeolites: Na-X, RHO and ZK-5, which can all be prep

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Díaz, Urbano. "Layered Materials with Catalytic Applications: Pillared and Delaminated Zeolites from MWW Precursors." ISRN Chemical Engineering 2012 (November 14, 2012): 1–35. http://dx.doi.org/10.5402/2012/537164.

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Delaminated and pillared zeolites are an innovative family of molecular sieves which introduced a different concept inside the synthesis of active catalysts or inorganic supports. These types of materials exhibit an elevated accessibility due to their open structure, characterized by the high external surface area without imposed restrictions controlled by the pore sizes. These open zeolites are conformed by crystalline ordered (pillared zeolites) or disordered (delaminated zeolites) individual layers, exhibiting textural properties which are favorable to carry out catalytic processes in which

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DUBROVINA, K. R., T. R. SHAKIROV, L. R. BARAEVA, A. Z. SULEYMANOVA, and A. I. KHATSRINOV. "STUDY OF PROPERTIES OF NATURAL ZEOLITES AS SORBENTS FOR WASTEWATER TREATMENT." Herald of Technological University 27, no. 4 (2024): 47–51. http://dx.doi.org/10.55421/1998-7072_2024_27_4_47.

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Increasing pollution of the environment by discharges containing heavy and toxic metals into water bodies pose a serious danger to humans and ecology. For the capture of heavy metals from wastewater, sorption methods of treatment with natural adsorbents are of certain interest. Natural zeolites can be successfully applied for wastewater treatment with the purpose of selective extraction of metal ions. However, zeolites of natural origin need activation in order to increase surface energy, increase adhesion properties and as a consequence increase sorption characteristics. The most acceptable m

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Li, Yan, and Nan Lu. "Prospect of Modification Treatment and Application of Natural Zeolite Materials." Scientific Journal of Technology 7, no. 6 (2025): 11–16. https://doi.org/10.54691/ece8gh70.

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The efficient and extensive utilization of natural zeolites is restricted by factors such as pore blockage, weak ion exchange selectivity, and small adsorption capacity. Modifying natural zeolite materials is an important means to enhance their performance and value. Based on existing research results, this paper summarizes the characteristics of inorganic treatment, thermal modification, organic modification, metal loading and composite modification of zeolite materials, as well as their main applicable conditions and influencing factors. Finally, it looks forward to the challenges of large-s

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Mancinelli, Maura, Antonella Arfè, Annalisa Martucci, et al. "Evaluation for the Removal Efficiency of VOCs and Heavy Metals by Zeolites-Based Materials in the Wastewater: A Case Study in the Tito Scalo Industrial Area." Processes 8, no. 11 (2020): 1519. http://dx.doi.org/10.3390/pr8111519.

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The current study was designed to demonstrate the efficiency of selected zeolites in the immobilization of heavy metals and volatile organic compounds from water in the industrial area of Tito Scalo (Basilicata Region in Southern Italy). The efficiency of zeolite materials has been evaluated by analyzing real water samples, by a multi-technique approach. Gas chromatography (GC) and inductively coupled plasma optical emission spectrometry (ICP-OES) were selected for the detection of volatile organic compounds (VOCs) and heavy metals respectively, and then by thermal analysis (TG, DTA) and X-ray

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Cakicioglu-Ozkan, Fehime. "Adsorption of carbon dioxide on MIL53(Al), CuBTC and K- NaX zeolite." ICONTECH INTERNATIONAL JOURNAL 4, no. 3 (2020): 30–42. http://dx.doi.org/10.46291/icontechvol4iss3pp30-42.

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CO2 adsorption on K exchanged NaX zeolites, and metal organic frameworks (MOFs), namely Cu-BTC and MIL53 (Al) was studied at 5 °C and 25 °C. Exchange via ultrasonic and traditional methods, was conducted at 50 °C and 70 °C. The maximum replacement of Na+ ion with K+ ion in the extra framework of zeolite was increased from 76% to 83% with increasing temperature from 50 °C to 70 °C in the ultrasonic method which is more effective than traditional one. Compared with the zeolites, the MOF adsorbents used in this work have higher Langmuir specific surface area values namely 1278, 1473 and about 100

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