A comparative analysis of natural zeolites from various Cuban and Mexican deposits: structure, composition, thermal properties and hierarchical porosity

Zvereva, Irina A.; Shelyapina, Marina G.; Chislov, Mikhail; Novakowski, Vadim; Malygina, Ekaterina N.; Rodrı́guez-Iznaga, Inocente; Hernández, Miguel-Angel; Petranovskii, Vitalii

doi:10.1007/s10973-021-10947-4

Cited by 13 publications

(5 citation statements)

References 39 publications

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“…The characterization of the selected sorbent provided the following results: (a) the true density of Chabazite/Phillipsite granules resulted equal to 2.256 ± 0.003 g cm − 3 , a typical value for a natural zeolite [36]; (b) the BET specific surface area resulted 109 m 2 g − 1 , a relatively high value in comparison to the ones typically found in natural zeolites, in the 4-84 m 2 g − 1 range [37]; (c) the XRD pattern confirmed that the dominant crystalline phases are Chabazite (#52-0784) and Phillipsite (#39-1375) (Fig. S3, Supplementary Material); (d) the pore size distribution is broadly distributed along the 0.007-100 µm range, with an average pore size diameter of 0.12 µm, the most frequent pore diameter at 1.24 µm and an open porosity equal to 30.2%, in agreement with the values found in other natural zeolites from different deposits [36,38]. This meso-macroporosity is due to slot pores and pores located between blocks of the zeolite crystallite and other minerals in the rocks.…”

supporting

confidence: 84%

Ammonium recovery from municipal wastewater by ion exchange: Development and application of a procedure for sorbent selection

Pinelli

Foglia

Fatone

et al. 2022

Journal of Environmental Chemical Engineering

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supporting

confidence: 84%

Ammonium recovery from municipal wastewater by ion exchange: Development and application of a procedure for sorbent selection

Pinelli

Foglia

Fatone

et al. 2022

Journal of Environmental Chemical Engineering

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“…The composition of both catalysts was determined using EDS analysis ( Table 1 ) and for erionite the presence of seven cations is confirmed where silicon and aluminum represent the highest proportion ( Figure 4 ) with a Si/Al ratio of 3.9 similar as reported in the literature 3.7 [ 18 ]. The alumina synthesized by the sol-gel method presents purity according to what is observed in the EDS spectrum ( Figure 5 ) because there are no impurities after the synthesis process.…”

Section: Resultssupporting

confidence: 57%

“…According to the standard cards number 00-012-0275 and 00-062-0761 main peaks correspond to erionite and chabazite-Mg, respectively. According to the reference this Mexican zeolite contains 46% of erionite and 54% of chabazite and Si/Al ratio is 3.7 [ 18 ]. Figure 2 shows XRD pattern of alumina (Al 2 O 3 ), where four main broad peaks at 32.8º, 36.7º, 45.6º, and 67.2º with standard card number 00-046-1131 were clearly observed.…”

Section: Resultsmentioning

confidence: 99%

Degradation of dye containing in textile wastewater by sequential process: photocatalytic and biological treatment

HERNANDEZ¹,

OSORIO²,

ARIAS³

et al. 2022

Turkish Journal of Chemistry

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In this research, a combined photocatalytic and biological treatment is proposed for the elimination of pollutants present in textile wastewater using a natural erionite zeolite (PE) and aluminum oxide (PA) synthesized by the sol-gel method as photocatalysts, and solar radiation. Both catalysts were characterized by XRD, SEM, and EDS. For biological treatment two bacterial consortium were used: BC1 (Escherichia coli N16, Serratia k120, Pseudomonas putida B03 and Enterobacter hormaechei ), and consortium BC2 ( Escherichia coli N16, Serratia Mc107, Enterobacter N9, Enterobacter hormaechei Mc9 ). The photocatalytic and microbiological treatments were carried out initially separately and subsequently in a sequential manner, first the photocatalytic followed by the microbiological to determine if a synergistic effect was achieved. Comparing the photocatalytic performance, erionite showed higher performance of dyes degradation (54.75%) than alumina (28.62%). While in the biological process, BC1 decreased the dye concentration to 56.93% and BC2 to 53.56%. Finally, the best combined process was PA+BC1 reaching pollutants degradation 64.62%, showing that the application of both processes promotes a decolorization in textile wastewater. The water resulting from the combined photocatalysis-microbiological degradation processes was tested for toxicity using Daphnia magna , obtaining that none of the effluents shows toxicity.

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“…In addition, the authors conducted a comparative study of the most significant deposits of zeolites in the world. A comparative analysis of clinoptilolites from various deposits in Mexico and Cuba is presented in works [47,48]. On a global scale, one of the attempts to organize an open database of minerals, rocks, and their places of origin belongs to the non-profit Hudson Institute of Mineralogy [49].…”

Section: Main Deposits Stratification Impuritiesmentioning

confidence: 99%

Ion Exchange in Natural Clinoptilolite: Aspects Related to Its Structure and Applications

2022

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Clinoptilolite is one of the most common, widespread and abundant zeolites in nature. Its availability, low cost, and outstanding ion exchange properties make clinoptilolite an excellent candidate for both direct use and various modifications to create new low-cost functional materials for sustainable development. Specific applications in which clinoptilolite is already being used include water treatment and heavy metal ion removal, agricultural purposes, storage and conversion of unwanted gaseous emissions into the atmosphere, production of catalysts and photocatalysts, bioactive materials, and a number of others. Unlike some other zeolites, clinoptilolite is difficult to synthesize, which is why most publications refer to this zeolite in its natural form, either directly from the deposit or after applying various processes to this mineral to improve its properties. Among the modification methods used, ion exchange stands out. This review is devoted to the study of ion exchange processes in natural clinoptilolite with two goals: first, as its strategic property for use in processes in which cation exchange is fundamentally necessary; second, as a way to modify it to create composite materials with predetermined desired properties.

show abstract

A comparative analysis of natural zeolites from various Cuban and Mexican deposits: structure, composition, thermal properties and hierarchical porosity

Cited by 13 publications

References 39 publications

Ammonium recovery from municipal wastewater by ion exchange: Development and application of a procedure for sorbent selection

Ammonium recovery from municipal wastewater by ion exchange: Development and application of a procedure for sorbent selection

Degradation of dye containing in textile wastewater by sequential process: photocatalytic and biological treatment

Ion Exchange in Natural Clinoptilolite: Aspects Related to Its Structure and Applications

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