Cation Exchange Mechanism of Divalent Metals ions onto Synthetic NaX and LTA Zeolites: Efficiency and Selectivity | Zendy

Zeinab Ezzeddine | Zendy; Isabelle BatonneauGener | Zendy; Yannick Pouilloux | Zendy

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Cation Exchange Mechanism of Divalent Metals ions onto Synthetic NaX and LTA Zeolites: Efficiency and Selectivity

Author(s) -

Zeinab Ezzeddine,

Isabelle BatonneauGener,

Yannick Pouilloux

Publication year - 2018

Publication title -

european chemical bulletin

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.131

H-Index - 5

ISSN - 2063-5346

DOI - 10.17628/ecb.2018.7.93-97

Subject(s) - faujasite , selectivity , divalent , ion exchange , chemistry , inorganic chemistry , zeolite , metal , qualitative inorganic analysis , divalent metal , ion , catalysis , organic chemistry

Herein, the removal of divalent heavy metals by two types of zeolites was investigated. The mechanism of cation exchange for Cu 2+ , Ni 2+ , Cd 2+ and Pb 2+ on NaX Faujasite and Linde type A (LTA) zeolites was fully studied. Both zeolites were very efficient in divalent heavy metals removal from water. Ion exchange isotherms were performed and the thermodynamic parameters were calculated as well. Based on Kielland plots, the order of selectivity was not the same for both zeolites. For NaX it followed the following order Pb 2+ > Cu 2+ > Cd 2+ > Ni 2+ while for LTA: Pb 2+ > Cd 2+ > Cu 2+ > Ni 2+ . Exchange velocity (k_ w ) and the radii of the hydrated metals ions were involved in determining this order of selectivity.

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