Removal of Cr(VI) from Aqueous Solutions Using Semnan Natural Clinoptilolit Zeolite

Jorfi, Sahand; Jafarzadeh Haghighifard, Nematallah; Ahmadi, Mohammad Javad; Shaheidar, Narjes; Purhoseini, Hakimeh

Document Type : Original Article

Authors

¹ Assistant Proffesor, Department of Environmental Health Engineering, School of Health, Ahvaz Judishapur University of Medical Sciences, Ahvaz, Iran

² Proffesor, Department of Environmental Health Engineering, School of Health, Ahvaz Judishapur University of Medical Sciences, Ahvaz, Iran

³ M.Sc. of Environmetal Health, School of Health, Ahvaz Judishapur University of Medical Sciences, Ahvaz, Iran

Abstract

Background & Objectives: Cr(IV) is a toxic heavy metal with dangerous effects on health and environment and is discharged through industrial effluents. The main aim of the current study was to determine the efficiency of natural zeolite on removal Cr(IV) from aqueous solutions.
Materials & Methods: Following the chemical modification of Zeolite, the study variables including pH (2-10), adsorbent dosage (2-20 g/L), reaction time (5-150 min) and Cr(IV) concentration (10-50) were optimized according to the one at the time experimental design. The correlation of obtained data with conventional isotherms and kinetics were also studied.
Results: In optimum pH 2, reaction time of 30 min and adsorbent dosages of 8 g/L, the most removal efficiency of 99.53% was observed for initial Cr(IV) concentration of 10 mg/L. The Freundlich isotherm and pseudo –second order kinetics were better fitted to the findings.
Conclusions:According to findings of current study in lab scale, it can be concluded that natural Zeoliite can be considered as an efficient and cost effective alternative on treatment of effluents containing Cr(IV).

Keywords

References

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Removal of Cr(VI) from Aqueous Solutions Using Semnan Natural Clinoptilolit Zeolite

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Volume 24, Issue 1April & MayMarch and April 2017Pages 55-62

Volume 24, Issue 1
April & May
March and April 2017
Pages 55-62