Development of kinetic and equilibrium models for removal of  C d 2+  and  Z n 2+  ions from aqueous solutions by clinoptilolite | Zendy

Irannajad Mehdi | Zendy; Kamran Haghighi Hossein | Zendy; Safarzadeh Eshagh | Zendy

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Development of kinetic and equilibrium models for removal of C d 2+ and Z n 2+ ions from aqueous solutions by clinoptilolite

Author(s) -

Irannajad Mehdi,

Kamran Haghighi Hossein,

Safarzadeh Eshagh

Publication year - 2016

Publication title -

environmental progress and sustainable energy

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.495

H-Index - 66

eISSN - 1944-7450

pISSN - 1944-7442

DOI - 10.1002/ep.12260

Subject(s) - clinoptilolite , sorption , aqueous solution , langmuir , chemistry , freundlich equation , adsorption , kinetic energy , ion , langmuir adsorption model , inorganic chemistry , nuclear chemistry , zeolite , analytical chemistry (journal) , chromatography , organic chemistry , physics , catalysis , quantum mechanics

The ability of clinoptilolite to remove Cd 2+ and Zn 2+ from aqueous solution was studied. In this regard, the effects of important parameters such as initial concentration, initial pH, chemical conditioning, environmental temperature, and contact time on the Zn 2+ and Cd 2+ sorption were investigated. The results showed that the Zn 2+ and Cd 2+ sorption behavior was highly dependent on the pH. Sorption data were interpreted in terms of Langmuir and Freundlich equations. As a result, sorption isotherms of Zn 2+ and Cd 2+ ions could be best modeled by the Langmuir equation. The maximum capacity of Zn 2+ and Cd 2+ using modified clinoptilolite was found to be 229 and 72.30 mg/g. Furthermore, kinetic investigations showed that the adsorption rate was best described by a pseudo‐second‐order kinetic model. With respect to the results, clinoptilolite has a particularly high potential for Cd 2+ and Zn 2+ removal. © 2015 American Institute of Chemical Engineers Environ Prog, 35: 633–641, 2016

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