Comparative analyses of physical properties of natural zeolites from Armenia and USA

Yeritsyan, Hrant N.; Nickoghosyan, Sergey K.; Sahakyan, Aram A.; Harutunyan, V.V.; Hakhverdyan, Eleonora A.; Grigoryan, N. E.

doi:10.1016/s0167-2991(08)80256-x

Cited by 8 publications

(5 citation statements)

References 9 publications

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“…For many years, zeolites have attracted attention due to their physical and chemical properties (Colella and Gualtieri, 2007). According to the results of Gerrard et al (2004) and Yeritsyan et al (2008), zeolites are porous materials characterized by their ability to 1) lose and gain water reversibly, 2) adsorb molecules of appropriate crosssectional diameter (adsorption property or acting as molecule sieves), and 3) exchange their constituent cations without a major change in their structure (ion-exchange property). Zeolites are known due to having many different potential applications in agriculture (Ramesh et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

Microbial communities and their characteristics in a soil amended by nanozeolite and some plant residues: Short time in-situ incubation

Aminiyan

Hosseini

Heydariyan

2018

Eurasian Journal of Soil Science (Ejss)

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Article Info Received : 29.04.2017 Accepted : 08.07.2017 Soil microbial communities and their related characteristics are an important agent for soil fertility, productivity, and sustainability. Also, they are useful indicators of soil quality and life index in agricultural systems. The objectives of this study were the effect of nanozeolite and plant residues on soil microbial communities and their characteristics and also, the assessment of incubation timing on soil microbial properties. Soil microorganisms are very important in the decomposition of plant residues. In this regard, the soil samples were treated by nanozeolite (0, 10 and 30% Weight), Alfalfa and wheat straw (0 and 5% Weight). The treated soil samples were incubated in lab condition for 90 days. The result of this study showed that Bacterial, Fungal, and Actinomycete populations increased by the addition of 30% of nanozeolite and 5% of plant residues, especially alfalfa straw. Also, the addition of nanozeolite and plant residues treatments improved MBC, BR, and SIR as microbial characteristics. These parameters increased after 30 days of starting incubation, then decreased until the 75 th day and finally increased slightly on the 90 th day. In fact, the addition of nanozeolite and plant residues into the soil had positive effects on improvement of carbon pools and increasing carbon sequestration in it. Applied nanozeolite and plant residues in soil, improved carbon pools and increased carbon sequestration in soil. Also the application of nanozeolite and plant residues especially alfalfa straw had positive effects on improvement of soil biological communities and characteristics.

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Section: Introductionmentioning

confidence: 99%

Microbial communities and their characteristics in a soil amended by nanozeolite and some plant residues: Short time in-situ incubation

Aminiyan

Hosseini

Heydariyan

2018

Eurasian Journal of Soil Science (Ejss)

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“…Natural zeolites are crystalline, hydrated aluminosilicates of alkali and alkaline earth cations, consisting of three-dimensional frameworks of SiO4 4and AlO4 5tetrahedra linked through shared oxygen atoms (Gotardi, 1989;Gerrard et al, 2004;Yeritsyan et al, 2008). They are porous materials characterized by their ability to 1) lose and gain water reversibly, 2) adsorb molecules of appropriate cross-sectional diameter (adsorption property or acting as molecule sieves) and 3) exchange their constituent cations without a major change in their structure (ion-exchange property) (Moirou et al, 2000;Christidis et al, 2003;Andrade et al, 2008;Wang J. et al, 2008;Henry et al, 2008;Salvestrini et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

Application of natural zeolites in anaerobic digestion processes: A review

Montalvo

Guerrero

Borja

et al. 2012

Applied Clay Science

237

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Artículo de publicación ISIThis paper reviews the most relevant uses and applications of zeolites in anaerobic digestion processes. The feasibility of using natural zeolites as support media for the immobilization of microorganisms in different high-rate reactor configurations (fixed bed, fluidized bed, etc.) is also reviewed. Zeolite, with its favorable characteristics for microorganism adhesion, has also been widely used as an ion exchanger for the removal of ammonium in anaerobic digestion due to the presence of Na+, Ca2+ and Mg2+ cations in its crystalline structure. This property is also useful for improving the anaerobic process performances in the treatment of wastewaters with high concentrations of nitrogen compounds, such as cattle, pig and chicken wastes, as it prevents process inhibition. The influence of zeolite particle size and doses in batch mesophilic and thermophilic processes when referring to synthetic or different wastewaters is also reviewed. Finally, the role of zeolite in granulation processes, in anaerobic oxidation processes (Anammox) for promoting the retention of the biomass involved (given its low growth rate), and in hybrid and sequencing reactors such as the moving bed biofilm reactors (MBBR) are also discussed

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“…The radiolytic and displacement effects on adsorbed water must also be considered. A radiation dose of 3·10 16 electron/cm 2 at an energy of 8 MeV appears critical to promote structural changes in these natural zeolite samples, which is signified by a pronounced variation in the dielectric properties and optical characteristics of the materials910.…”

Section: Methodsmentioning

confidence: 99%

Radiation-modified natural zeolites for cleaning liquid nuclear waste (irradiation against radioactivity)

Yeritsyan

Sahakyan

Harutyunyan

et al. 2013

Sci Rep

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There have been comparatively few investigations reported of radiation effects in zeolites, although it is known that these materials may be modified substantially by exposure to ionizing radiation. Thus, by exposure to γ-rays or high-energy particles, the charge states of atoms may be changed so to create, and accumulate, lattice point defects, and to form structurally disordered regions. Such a technique may permit the creation, in a controlled fashion, of additionally useful properties of the material while preserving its essential stoichiometry and structure. Accordingly, we present an application, in which the cation-exchange capacity of a natural zeolite (clinoptilolite) is substantially enhanced, for the treatment/decontamination of water contaminated with radionuclides e.g. 134Cs, 137Cs and 90Sr, by its exposure to high-energy (8 MeV) electrons, and to different total doses.

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Comparative analyses of physical properties of natural zeolites from Armenia and USA

Cited by 8 publications

References 9 publications

Microbial communities and their characteristics in a soil amended by nanozeolite and some plant residues: Short time in-situ incubation

Microbial communities and their characteristics in a soil amended by nanozeolite and some plant residues: Short time in-situ incubation

Application of natural zeolites in anaerobic digestion processes: A review

Radiation-modified natural zeolites for cleaning liquid nuclear waste (irradiation against radioactivity)

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