Changes in the Textural Parameters of Fly Ash-Derived Na-P1 Zeolite During Compaction Processes

Panek, Rafał; Wdowin, Magdalena; Bandura, Lidia; Wisła-Walsh, E.; Gara, Paweł; Franus, Wojciech

doi:10.1515/mipo-2017-0008

Cited by 8 publications

(6 citation statements)

References 39 publications

(37 reference statements)

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“…Zeolites have the ability to sort molecules selectively based on a size exclusion process. This is due to a very regular pore structure of molecular dimension (Panek et al 2017;Woszczuk and Franus 2017;Bandura et al 2017;Franus et al 2015).…”

Section: Introductionmentioning

confidence: 99%

Adsorption mechanism of poly(vinyl alcohol) on the surfaces of synthetic zeolites: sodalite, Na-P1 and Na-A

et al. 2019

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The structure of poly(vinyl alcohol)-PVA layers adsorbed on the synthetic zeolites surfaces was determined. Three zeolites: sodalite, Na-P1 and Na-A were obtained using hydrothermal conversion of fly ash with aqueous sodium hydroxide. The effects of solution pH and zeolite type on the adsorption mechanism of the polymer were examined. The analysis of the results obtained by means of spectrophotometric and microelectrophoretic measurements as well as potentiometric titrations enabled description of interfacial behaviour of adsorbed macromolecules. It was shown that the presence of poly(vinyl alcohol) layers modifies the surface properties of applied zeolites. The evidence of this are changes in the surface charge density and zeta potential of solid particles observed in the polymer presence. Moreover the PVA chains exhibit different adsorption affinity for the examined zeolites depending mainly on the mean pore size of these aluminosilicates which is very important for penetration of internal zeolite structure by polymeric macromolecules.

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Section: Introductionmentioning

confidence: 99%

Adsorption mechanism of poly(vinyl alcohol) on the surfaces of synthetic zeolites: sodalite, Na-P1 and Na-A

et al. 2019

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“…Ukrainian dust in terms of grain size distribution shows more similarity to binder B. Slovak dust, in terms of particle size, is more compatible with binder A. According to Panek et al [ 48 ], the compatibility of the grain size of the material subjected to the consolidation process with the grain size of the binder is an important factor affecting the properties of the obtained products. The similar grain size of the materials results in agglomerates with higher integral density.…”

Section: Resultsmentioning

confidence: 99%

“…It was also found, that in addition to the wetting agent (water), the process of zeolite dust agglomeration by the pressure agglomeration method requires the use of a suitable binding agent, which is typical for most dusty materials [ 46 , 47 ]. At this point, it is worth noting that the physical and chemical properties of the materials fed to the agglomeration and the agglomeration method used have a significant impact on the formation of the textural properties of the produced sorbents and this affects, among other things, the sorption properties and durability of the agglomerates [ 48 ]. In addition, the parameters of the agglomeration process also shape the properties of the obtained products [ 49 ].…”

Section: Agglomeration Experimentsmentioning

confidence: 99%

Possibility of Using Natural Zeolite Waste Granules Obtained by Pressure Agglomeration as a Sorbent for Petroleum Substances from Paved Surfaces

et al. 2022

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Increasing incidents of oil spills and dynamic development of civilization are driving the demand for sorbents. The production of the overwhelming majority of mineral sorbents involves the highly energy-consuming calcination process with CO2 emissions impacting the environment. Taking into account the environmental issues related to greenhouse gas emissions, we are in urgent need of green products and green technologies. The aim of this study was to investigate the possibility of using natural zeolite dust waste to produce oil sorbents in non-calcination technology. The main advantage of the proposed solution is reduction of greenhouse gas emissions and transformation of the waste material into green, useful product. The scope of the research covered the experimental tests for compaction of the zeolite material from Ukraine and Slovakia in a roller press with different type of binding agent and the performance tests for assessing the suitability of the produced agglomerates as a petroleum sorbent. In order to evaluate the agglomerates’ properties, textural-structural analysis (optical microscopy, SEM microscopy, and low-temperature N2 sorption), petroleum sorption (Westinghouse method), and physical-mechanical tests (resistance to gravitational drop, abrasion resistance) were carried out. Properties of the manufactured agglomerates were studied in comparison to commercial sorbent DAMSORB, commonly used in Poland. The test results showed that it is doable to produce the effective surface oil-spill sorbent from zeolite waste dust in a roller press by applying the relevant binding agent. The main finding of this study was that optimum feed composition for dry granulation that provides the granular sorbent with the best properties was established: 6% of C binder and moisture content within a narrow range of 20–20.6%. The C-1 sorbent achieved the highest and closely comparable to commercial sorbent parameters of petroleum sorption and drop strength, which are key points of this study. The absorption efficiency of petroleum substances for C-1 sorbent is 8% lower than that of a commercial sorbent, and resistance to gravitational drop is lower by only 3%. However, commercial sorbent exhibited better abrasion resistance compared to produced agglomerates, which is a compelling reason to continue the research in order to enhance the abrasion performance of the manufactured granules. The effectiveness of the dust consolidation method carried out was proved by textural parameters of the obtained zeolite-based sorbents. Specific surface area (SBET) of B-2 (SBET = 28.1 m2/g) and C-2 (SBET = 28.3 m2/g) sorbents was very similar to the commercial sorbent (SBET = 28.1 m2/g). Interestingly, all granules produced from clinoptilolite dust from Slovakia (A-2, B-2, C-2) achieved an increase of 19%, 33%, and 35%, respectively, in volume of mesopores, compared to the commercial sorbent. Moreover, the presented granulation technology favorably affected the size of the specific surface area as well as volume and surface area of mesopores in the case of obtained zeolite-based sorbent A-1 and B-1, compared with the starting raw material. Zeolite-based sorbent A-1 and B-1 achieved an increase of 17% and 18%, respectively, in specific area surface and an increase of 35% and 12%, respectively, in mesopores volume, compared with the raw material. Finally, the results of this investigation proved that it is possible to produce the efficient oil sorbent in a much more eco-friendly and green way, compared with that of the commercial sorbent.

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“…Due to its electromagnetic separation, the obtained high-carbon product (HiC FA) could be used to produce a carbon-zeolite composite. The final product was created in a typical zeolitization process based on the hydrothermal reaction of fly ash with an aqueous solution of sodium hydroxide [29,30].…”

Section: Methodsmentioning

confidence: 99%

Comparison of Physicochemical Properties of Fly Ash Precursor, Na-P1(C) Zeolite–Carbon Composite and Na-P1 Zeolite—Adsorption Affinity to Divalent Pb and Zn Cations

et al. 2021

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Considering the growing needs of environmental remediation, new effective solutions should be sought. Therefore, the adsorbed amounts of heavy metal ions, such as lead(II) and zinc(II), on the surface of high-carbon fly ash (HiC FA), zeolite-–carbon composite (Na-P1(C)) and pure zeolite (Na-P1), were investigated. The applied solids were characterized using the following techniques: XRD, SEM-EDS, TEM, porosimetry, SLS, electrophoresis and potentiometric titration. The heavy metal concentration in the probes was determined by applying ICP-OES spectroscopy. Adsorption/desorption and electrokinetic measurements were performed in the systems containing one or two adsorbates. The obtained results indicated that Pb(II) ions are adsorbed in larger amounts on the investigated solid surface due to the molecular sieving effect. The largest adsorption capacity relative to lead(II) ions was observed for pure Na-P1 zeolite (407 mg/g). The simultaneous presence of Pb(II) + Zn(II) mixed adsorbates minimally affects the amount of adsorbed Pb(II) ions and causes a significant decrease of Zn(II) ion adsorption (in comparison with analogous systems containing single adsorbates). It was also shown that all solids can be efficiently regenerated using hydrochloric acid. Thus, the selected pure zeolite can be successfully applied in soil remediation or other purifying technologies as an effective Pb(II) adsorbent.

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Changes in the Textural Parameters of Fly Ash-Derived Na-P1 Zeolite During Compaction Processes

Cited by 8 publications

References 39 publications

Adsorption mechanism of poly(vinyl alcohol) on the surfaces of synthetic zeolites: sodalite, Na-P1 and Na-A

Adsorption mechanism of poly(vinyl alcohol) on the surfaces of synthetic zeolites: sodalite, Na-P1 and Na-A

Possibility of Using Natural Zeolite Waste Granules Obtained by Pressure Agglomeration as a Sorbent for Petroleum Substances from Paved Surfaces

Comparison of Physicochemical Properties of Fly Ash Precursor, Na-P1(C) Zeolite–Carbon Composite and Na-P1 Zeolite—Adsorption Affinity to Divalent Pb and Zn Cations

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