Zeta Potential of Beta Zeolites: Influence of Structure, Acidity, pH, Temperature and Concentration

Liu, Xuan; Mäki‐Arvela, Päivi; Aho, Atte; Vajglová, Zuzana; Gun'ko, V.М.; Heinmaa, Ivo; Kumar, Narendra; Eränen, Kari; Salmi, Tapio; Murzin, Dmitry Yu.

doi:10.3390/molecules23040946

Cited by 64 publications

(28 citation statements)

References 52 publications

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“…The EDL should be different with the same surface structure in pores of the adsorbent and on its surface of micro- and nanoparticles. Parameters such as pH, temperature, and solution composition can have impacts on the structure of the EDL on the particle surface and in pores of different sizes [ 42 , 43 , 44 , 45 , 46 , 47 ]. In the next step, the SS-FA was rinsed with distilled water in order to obtain a pH of 7 of the dispersion system.…”

Section: Resultsmentioning

confidence: 99%

Highly Effective Adsorption Process of Ni(II) Ions with the Use of Sewage Sludge Fly Ash Generated by Circulating Fluidized Bed Combustion (CFBC) Technology

2021

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Recently, more and more attention has been paid to the removal of nickel ions due to their negative effects on the environment and human health. In this research, fly ash obtained as a result of incineration of municipal sewage sludge with the use of circulating fluidized bed combustion (CFBC) technology was used to analyze the possibility of removing Ni(II) ions in adsorption processes. The properties of the material were determined using analytical methods, such as SEM-EDS, XRD, BET, BJH, thermogravimetry, zeta potential, SEM, and FT-IR. Several factors were analyzed, such as adsorbent dose, initial pH, initial concentration, and contact time. As a result of the conducted research, the maximum sorption efficiency was obtained at the level of 99.9%. The kinetics analysis and isotherms showed that the pseudo-second order equation model and the Freundlich isotherm model best suited this process. In conclusion, sewage sludge fly ash may be a suitable material for the effective removal of nickel from wastewater and the improvement of water quality. This research is in line with current trends in the concepts of circular economy and sustainable development.

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Section: Resultsmentioning

confidence: 99%

Highly Effective Adsorption Process of Ni(II) Ions with the Use of Sewage Sludge Fly Ash Generated by Circulating Fluidized Bed Combustion (CFBC) Technology

2021

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“…Despite the fact that in some cases acidic or alkaline extracting phases were employed, the time of contact of 5 min with the loaded zeolite (see Section 3.3 ) is too brief to induce structural degradation. Moreover, it should be considered that, in the studied pH range, it has been reported that zeolites [ 42 , 44 ] do not undergo degradation.…”

Section: Resultsmentioning

confidence: 99%

High-Silica Zeolites as Sorbent Media for Adsorption and Pre-Concentration of Pharmaceuticals in Aqueous Solutions

et al. 2020

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The present work focused on the use of high-silica commercial zeolites as sorbent media for pharmaceuticals in an aqueous matrix. As drug probes, ketoprofen, hydrochlorothiazide, and atenolol were selected, because of their occurrence in surface waters and effluents from wastewater treatment plants. Pharmaceuticals adsorption was evaluated for two Faujasite topology zeolites with Silica/Alumina Ratio 30 and 200. The selected zeolites were demonstrated to be efficient sorbents towards all investigated pharmaceuticals, thanks to their high saturation capacities (from 12 to 32% w/w) and binding constants. These results were corroborated by thermal and structural analyses, which revealed that adsorption occurred inside zeolite’s porosities, causing lattice modifications. Finally, zeolites have been tested as a pre-concentration media in the dispersive-solid phase extraction procedure. Recoveries higher than 95% were gained for ketoprofen and hydrochlorothiazide and approximately 85% for atenolol, at conditions that promoted the dissolution of the neutral solute into a phase mainly organic. The results were obtained by using a short contact time (5 min) and reduced volume of extraction (500 µL), without halogenated solvents. These appealing features make the proposed procedure a cost and time saving method for sample enrichment as well as for the regeneration of exhausted sorbent, rather than the more energetically expensive thermal treatment.

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“…The principle of the zeta measurement is substantive because it measures a proportion of the analyzed sample (relative particle amount as a percentage where the total amount of particles is 100%). Thus, the large amount of particles measured through the zeta analysis justified the measurement of the particle proportion [29][30][31][32][33] . Unlike zeta potential measurements, a low PDI indicates a small and uniform size distribution of particles, whereas a high PDI value indicates a large and irregular distribution of particle sizes 34 .…”

Section: Resultsmentioning

confidence: 99%

Aluminosilicate Nanocomposites from Incinerated Chinese Holy Joss Fly Ash: A Potential Nanocarrier for Drug Cargos

Ramanathan

Gopinath

Arshad

et al. 2020

Sci Rep

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An incredible amount of joss fly ash is produced from the burning of Chinese holy joss paper; thus, an excellent method of recycling joss fly ash waste to extract aluminosilicate nanocomposites is explored. The present research aims to introduce a novel method to recycle joss fly ash through a simple and straightforward experimental procedure involving acidic and alkaline treatments. The synthesized aluminosilicate nanocomposite was characterized to justify its structural and physiochemical characteristics. A morphological analysis was performed with field-emission transmission electron microscopy, and scanning electron microscopy revealed the size of the aluminosilicate nanocomposite to be ~25 nm, while also confirming a uniformly spherical-shaped nanostructure. The elemental composition was measured by energy dispersive spectroscopy and revealed the Si to Al ratio to be 13.24 to 7.96, showing the high purity of the extracted nanocomposite. The roughness and particle distribution were analyzed using atomic force microscopy and a zeta analysis. X-ray diffraction patterns showed a synthesis of faceted and cubic aluminosilicate crystals in the nanocomposites. The presence of silica and aluminum was further proven by X-ray photoelectron spectroscopy, and the functional groups were recognized through Fourier transform infrared spectroscopy. The thermal capacity of the nanocomposite was examined by a thermogravimetric analysis. In addition, the research suggested the promising application of aluminosilicate nanocomposites as drug carriers. The above was justified by an enzyme-linked apta-sorbent assay, which claimed that the limit of the aptasensing aluminosilicateconjugated ampicillin was twofold higher than that in the absence of the nanocomposite. The drug delivery property was further justified through an antibacterial analysis against Escherichia coli (gramnegative) and Bacillus subtilis (gram-positive). An increasing amount of fly ash is being produced at an alarming rate throughout the world, and it is not a simple subject to be neglected. More than 90 million tons of fly ash are being produced annually in India, China and the USA and ~50,000 acres of land are used for ash ponds 1. Apart from coal combustion in thermal power plants, joss paper fly ash also shows a significant contribution toward tremendous fly ash accumulation. Joss paper has been used since the time of the six dynasties, and it is widely burned by the Chinese population during their festivals and funerals as a notable tradition. An estimated 90,000 to 220,000 tons of joss paper is burned each year. Although the exact figure has not been identified, it is one of the main causes of air pollution, predominantly in China and Taiwan. Efforts toward the invention of ecofriendly burning furnaces with high-efficiency incinerators, to reduce the release of heavy metals from fly ash, are not disregarded but have never met the expected objective 2,3. Several efforts have been shown for the disposal or recycling of joss fly ash. The consumption of fly ash...

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Zeta Potential of Beta Zeolites: Influence of Structure, Acidity, pH, Temperature and Concentration

Cited by 64 publications

References 52 publications

Highly Effective Adsorption Process of Ni(II) Ions with the Use of Sewage Sludge Fly Ash Generated by Circulating Fluidized Bed Combustion (CFBC) Technology

Highly Effective Adsorption Process of Ni(II) Ions with the Use of Sewage Sludge Fly Ash Generated by Circulating Fluidized Bed Combustion (CFBC) Technology

High-Silica Zeolites as Sorbent Media for Adsorption and Pre-Concentration of Pharmaceuticals in Aqueous Solutions

Aluminosilicate Nanocomposites from Incinerated Chinese Holy Joss Fly Ash: A Potential Nanocarrier for Drug Cargos

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