Experimental and theoretical assessment of CO2 capture by adsorption on clinoptilolite

Diógenes, Thalles Senna; Santiago, Rafaelle Gomes; Maia, Débora Aline Soares; Gonçalves, Daniel V.; Azevedo, Diana C. S.; Lucena, Sebastião M. P.; Bastos‐Neto, Moises

doi:10.1016/j.cherd.2021.11.033

Cited by 12 publications

(4 citation statements)

References 85 publications

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“…The specific area obtained for the CP zeolite sample was 131.17 m 2 g −1 . This value differs from other studies but is acceptable, as the characteristics of natural clinoptilolite zeolite vary according to the extraction region (Diógenes et al, 2022 ). The pH pzc value obtained from the CP natural zeolite sample was 7.2, indicating that for pH values below the PZC value, the adsorbent surface will be positively charged and for values above, the surface will be negatively charged (Batistela et al, 2017 ).…”

Section: Resultsmentioning

confidence: 56%

Hydroxychloroquine Adsorption in Aqueous Medium Using Clinoptilolite Zeolite

Nippes

Macruz

Molina

et al. 2022

Water Air Soil Pollut

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The presence of drugs on a large scale in aquatic matrices raises concern and requires the study of efficient technologies to remove these compounds. This study investigated the adsorption capacity of the natural zeolite clinoptilolite (CP) in removing the drug hydroxychloroquine (HCQ). Zeolite was characterized by BET, XRD, FT-IR, SEM, and pH pzc techniques. The kinetic model that best fits the experimental data was the pseudo-first-order and the SIPS isotherm provided the best fit. The Langmuir isotherm RL separation factor (> 0.01) indicated that the adsorption process was favorable and the Freundlich isotherm ( n > 1) suggested that the adsorption mechanism occurred mainly by physisorption, with intraparticle diffusion as the step limiting the process. The process was spontaneous (ΔG° ads < 0), endothermic (ΔH° ads > 0), and with increased randomness at the solid-solution interface (ΔS° ads > 0). The initial pH variation of the effluent was not favorable for the adsorption process and the zeolite was easily regenerated for later use. The ecotoxicological tests with Artemia salina and Lactuca Sativa proved that the final effluent did not show toxicity after the adsorption treatment. Based on the results obtained in this work, clinoptilolite zeolite is a potential adsorbent for reducing HCQ toxicity in aquatic matrices. Supplementary Information The online version contains supplementary material available at 10.1007/s11270-022-05787-3.

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Section: Resultsmentioning

confidence: 56%

Hydroxychloroquine Adsorption in Aqueous Medium Using Clinoptilolite Zeolite

Nippes

Macruz

Molina

et al. 2022

Water Air Soil Pollut

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“…Their detailed structural characteristics are summarized in Table 1, referring to the report of Hu et al [51]. Especially, clinoptilolite is one of the most abundant minerals in the zeolite family [67]. It has a monoclinic framework consisting of a ten-member ring and two eight-member rings formed by the linkage of the AlO 4 and SiO 4 tetrahedral units.…”

Section: Types and Structure Characteristics Of Zeolite Mineralsmentioning

confidence: 99%

Removal of Emerging Organic Pollutants by Zeolite Mineral (Clinoptilolite) Composite Photocatalysts in Drinking Water and Watershed Water

Zhou,

Wang,

Shen

et al. 2024

Catalysts

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One of the most challenging problems for people around the world is the lack of clean water. In the past few decades, the massive discharge of emerging organic pollutants (EOPs) into natural water bodies has exacerbated this crisis. Considerable research efforts have been devoted to removing these EOPs due to their biotoxicity at low concentrations. Heterogeneous photocatalysis via coupling clay minerals with nanostructured semiconductors has proven to be an economical, efficient, and environmentally friendly technology for the elimination of EOPs in drinking water and watershed water. Natural zeolite minerals (especially clinoptilolites) are regarded as appropriate supports for semiconductor-based photocatalysts due to their characteristics of having a low cost, environmental friendliness, easy availability, co-catalysis, etc. This review summarizes the latest research on clinoptilolites used as supports to prepare binary and ternary metal oxide or sulfide semiconductor-based hybrid photocatalysts. Various preparation methods of the composite photocatalysts and their degradation efficiencies for the target contaminants are introduced. It is found that the good catalytic activity of the composite photocatalyst could be attributed to the synergistic effect of combining the clinoptilolite adsorbent with the semiconductor catalyst in the heterogeneous system, which could endow the composites with an excellent adsorption capacity and produce more e−/h+ pairs under suitable light irradiation. Finally, we highlight the serious threat of EOPs to the ecological environment and propose the current challenges and limitations, before putting the zeolite mineral composite photocatalysts into practice. The present work would provide a theoretical basis and scientific support for the application of zeolite-based photocatalysts for degrading EOPs.

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“…This force field was chosen because it can be quickly adapted to different zeolites and gases. 27 The reparameterization strategy should be useful for further tests of the typification methodology in other zeolites. Similarly to what has been observed for activated carbon, 12 we emphasize that the choice for a particular force field does not exclude the other force fields in the literature, which are also suitable for performing kernels.…”

Section: ■ Models and Methodsmentioning

confidence: 99%

“…Some force fields available in the literature are able to predict the adsorption of CO 2 in LTA zeolites. − In the present work, we apply a force field, based on a previous study with CO 2 adsorption on FAU zeolites, in which the isotherms crossover pressure signature for NaX and NaY was reproduced by the simulated data, resulting in physically realistic parameters. This force field was chosen because it can be quickly adapted to different zeolites and gases . The reparameterization strategy should be useful for further tests of the typification methodology in other zeolites.…”

Section: Models and Methodsmentioning

confidence: 99%

LTA Zeolite Characterization Based on Pore Type Distribution

Lucena

Oliveira

Gonçalves

et al. 2022

Ind. Eng. Chem. Res.

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Despite the great industrial importance of zeolite LTA, there is still a gap in characterization methods, based on adsorption related to hindered diffusion of standard probe gases, such as N2 and Ar. LTA has a three-dimensional porous structure with a high degree of symmetry; however, variations in the location of cations, notably S2 and S3 sites, lead to different energy levels in supercages. Herein, we propose to extend the pore type distribution (PTD) methodology, recently applied for metal–organic frameworks, to zeolite materials. As an application example, we selected Na-LTA (4A) zeolite. Structural properties accessed by molecular simulation methods combined with experimental adsorption isotherms of CO2 at 273 K determine the individual contribution of supercages, with different energy levels, to the total adsorption uptake. Using eight local isotherms from the supercages, we developed a kernel that estimates the most likely energy distribution levels among supercages from the best fits of experimental isotherms. The method was applied in detail for LTA samples synthesized in laboratory and supplied by an industrial manufacturer. As an extension of the approach, we also analyze the use of the average local isotherm in the determination of imperfections found in the synthesis of LTA from unconventional raw materials or its deactivation in industrial processes. The proposed methodology generates detailed and relevant information not accessed by existing methods and allows the use of adsorption to characterize this class of very small pore sieves.

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Experimental and theoretical assessment of CO2 capture by adsorption on clinoptilolite

Cited by 12 publications

References 85 publications

Hydroxychloroquine Adsorption in Aqueous Medium Using Clinoptilolite Zeolite

Hydroxychloroquine Adsorption in Aqueous Medium Using Clinoptilolite Zeolite

Removal of Emerging Organic Pollutants by Zeolite Mineral (Clinoptilolite) Composite Photocatalysts in Drinking Water and Watershed Water

LTA Zeolite Characterization Based on Pore Type Distribution

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