Ion exchange in natural clinoptilolite: aspects related to its structure and applications

I Rodríguez-Iznaga, MG Shelyapina, V Petranovskii - Minerals, 2022 - mdpi.com
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 …

Cation exchange modification of clinoptilolite–Screening analysis for potential equilibrium and kinetic adsorption separations involving methane, nitrogen, and carbon …

DA Kennedy, FH Tezel - Microporous and Mesoporous Materials, 2018 - Elsevier
In this study, natural clinoptilolite was modified by cation exchange using alkali metal cations
(Li+, Na+, K+, Rb+, Cs+), alkaline earth metal cations (Be 2+, Mg 2+, Ca 2+, Sr 2+, Ba 2+) …

N2-selective adsorbents and membranes for natural gas purification

Y Zhou, Y Yuan, S Cong, X Liu, Z Wang - Separation and Purification …, 2022 - Elsevier
Conventional natural gas confronts the growing supply shortage due to the fewer formation
reserves. As a powerful replenishment, the nitrogen-rich unconventional natural gas, mainly …

Cation exchange modification of clinoptilolite–thermodynamic effects on adsorption separations of carbon dioxide, methane, and nitrogen

DA Kennedy, M Mujčin, C Abou-Zeid… - … and Mesoporous Materials, 2019 - Elsevier
This study details an experimental analysis of the thermodynamics of adsorption equilibrium
behaviour of pure CO 2, CH 4, and N 2 gases on raw, Fe 3+, Ca 2+, and Cs+ cation …

As (V) sorption by different natural zeolite frameworks modified with Fe, Zr and FeZr

GC Velazquez-Peña, M Solache-Ríos… - Microporous and …, 2019 - Elsevier
The structural effect of Fe-, Zr-and FeZr-modified clinoptilolite-, mordenite-and chabazite-rich
tuffs was examined on the As (V) sorption from aqueous solutions. Batch experiments were …

Ammonium modified natural clinoptilolite to remove manganese, cobalt and nickel ions from wastewater: Favorable conditions to the modification and selectivity to the …

I Rodríguez-Iznaga, G Rodríguez-Fuentes… - Microporous and …, 2018 - Elsevier
The removal of manganese, cobalt and nickel from industrial ammoniacal wastewaters has
been studied using natural Cuban clinoptilolite modified to ammonium form. Favorable …

Microporous and mesoporous materials for the treatment of wastewater produced by petrochemical activities

M Maretto, F Blanchi, R Vignola, S Canepari… - Journal of cleaner …, 2014 - Elsevier
The recovery of wastewater will be a fundamental action in the coming years to facilitate the
sustainable development of the world's economies. A large portion of recoverable …

The effect of Ag+ cations on the micropore properties of clinoptilolite and related adsorption separation of CH4 and N2 gases

DA Kennedy, M Khanafer, FH Tezel - Microporous and Mesoporous …, 2019 - Elsevier
In this study, we report on the effects of Ag+ cations exchange within clinoptilolite zeolite in
relation to both the physicochemical and the gas adsorption characteristics. Clinoptilolites …

[PDF][PDF] Relationship between Si/Al ratio and the sorption of Cd (II) by natural and modified clinoptilolite-rich tuff with sulfuric acid

Y Abdellaoui, MT Olguin, M Abatal, A Bassam… - Desalin. Water …, 2019 - researchgate.net
abstract In this paper, the differences in the adsorption mechanisms and adsorption
capacities of clinoptilolite materials with different Si/Al ratio (SAR) for Cd2+ ions from …

Adsorption and activation of ethene in transition metal exchanged zeolite clinoptilolite: A density functional study

EL Uzunova, H Mikosch - ACS catalysis, 2013 - ACS Publications
Ethene adsorption in transition-metal-exchanged clinoptilolite with cations of the d elements
(Fe–Cu) and also Pd was examined by density functional theory with the B3LYP functional …