Heterogeneity and hierarchy of clinoptilolite porosity

Catalytic and physicochemical properties of modified natural clinoptilolite

“…Such differences can be attributed to various chemical compositions, amount of the major zeolite phase, the presence of other phases and morphology of natural materials studied. The natural clinoptilolites accommodate various cations (Na + , Ca 2+ , Mg 2+ ) which might block the access to the structural micropores [38]. Higher SSA value found for the specimen of Kučin may point to higher clinoptilolite content (83%).…”

“…The micropores volume of the pristine material was low, 0.003 cm 3 /g (the same as reported for a sample from Moa (Cuba) [36]), and the overall specific surface area was ca. 34 m 2 /g [38], and 14 m 2 /g for a specimen from Bigardiç (Turkey) [39]. Such differences can be attributed to various chemical compositions, amount of the major zeolite phase, the presence of other phases and morphology of natural materials studied.…”

Reduction of Toxic Element Mobility in Mining Soil by Zeolitic Amendments

“…Among the natural zeolites, the mordenite exhibited better effect in the reduction of the solubility of heavy metals. The crystal structure of zeolite grains constitutes the primary porosity (microporosity) of zeolites, while the grain sizes of zeolite and other minerals in the zeolite rocks are connected with the secondary porosity (mesoporosity and macroporosity) (Sprynskyy et al, 2010). The primary porosity is defined as the microporosity displayed by the mineral 3-dimensional alumino-silicate framework.…”

Characterization and evaluation of chabazite- and mordenite-rich tuffs, and their mixtures as soil amendments and slow release fertilizers

“…According to Sprynskyy et al (2010), this structure may enhance the secondary porosity of the material, whereas it supplies active surfaces for catalysis, transport channels and adsorption of relatively large molecules (Mansouri et al 2013). …”