Adsorption of Cr(VI) by Natural Clinoptilolite Zeolite from Aqueous Solutions: Isotherms and Kinetics
The main aim of this study was to evaluate the efficiency of natural zeolite for Cr(VI) removal from aqueous solutions. Following simple modification of adsorbent, the effect of operational parameters including pH (2–10), adsorbent dosage (2–20 g/L), contact time (5–150 min) and Cr(VI) concentration...
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doaj-de6edfadd3164afb8a40db62968ce1ed2021-09-05T13:59:44ZengSciendoPolish Journal of Chemical Technology1899-47412017-09-0119310611410.1515/pjct-2017-0056pjct-2017-0056Adsorption of Cr(VI) by Natural Clinoptilolite Zeolite from Aqueous Solutions: Isotherms and KineticsJorfi Sahand0Ahmadi Mohammad Javad1Pourfadakari Sudabeh2Jaafarzadeh Nematollah3Soltani Reza Darvishi Cheshmeh4Akbari Hamideh5Ahvaz Jundishapur University of Medical Sciences, Environmental Technologies Research Center, Ahvaz, Iran (Islamic Republic of)Ahvaz Jundishapur University of Medical Sciences, Department of Environmental Health Engineering, School of Health, Ahvaz, Iran (Islamic Republic of)Ahvaz Jundishapur University of Medical Sciences, Department of Environmental Health Engineering, School of Health, Ahvaz, Iran (Islamic Republic of)Ahvaz Jundishapur University of Medical Sciences, Environmental Technologies Research Center, Ahvaz, Iran (Islamic Republic of)Arak University of medical Sciences, Department of Environmental Health Engineering, School of Health, Arak, Iran (Islamic Republic of).Zahedan University of Medical Sciences, Department of Environmental Health Engineering, School of Health, Zahedan, Iran (Islamic Republic of)The main aim of this study was to evaluate the efficiency of natural zeolite for Cr(VI) removal from aqueous solutions. Following simple modification of adsorbent, the effect of operational parameters including pH (2–10), adsorbent dosage (2–20 g/L), contact time (5–150 min) and Cr(VI) concentration (10–50 mg/L) were studied according to one-factor-at-a-time procedure. The maximum Cr(VI) removal of 99.53% was obtained at initial pH of 2, contact time of 30 min, adsorbent dosage of 8 g/L and initial chromium concentration of 10 mg/L. The Freundlich isotherm was best fitted with experimental data (R2 = 0.951). Also, type 1pseudo second order kinetic model showed the most correlation (R2 = 1) with the experimental data. According to obtained results, it can be concluded that the application of clay-like adsorbents such as natural clinoptilolite zeolite can be considered as an efficient alternative for final treatment of effluents containing Cr(VI).https://doi.org/10.1515/pjct-2017-0056adsorptionclinoptilolite zeolitecr(vi)isothermreaction kinetics |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Jorfi Sahand Ahmadi Mohammad Javad Pourfadakari Sudabeh Jaafarzadeh Nematollah Soltani Reza Darvishi Cheshmeh Akbari Hamideh |
spellingShingle |
Jorfi Sahand Ahmadi Mohammad Javad Pourfadakari Sudabeh Jaafarzadeh Nematollah Soltani Reza Darvishi Cheshmeh Akbari Hamideh Adsorption of Cr(VI) by Natural Clinoptilolite Zeolite from Aqueous Solutions: Isotherms and Kinetics Polish Journal of Chemical Technology adsorption clinoptilolite zeolite cr(vi) isotherm reaction kinetics |
author_facet |
Jorfi Sahand Ahmadi Mohammad Javad Pourfadakari Sudabeh Jaafarzadeh Nematollah Soltani Reza Darvishi Cheshmeh Akbari Hamideh |
author_sort |
Jorfi Sahand |
title |
Adsorption of Cr(VI) by Natural Clinoptilolite Zeolite from Aqueous Solutions: Isotherms and Kinetics |
title_short |
Adsorption of Cr(VI) by Natural Clinoptilolite Zeolite from Aqueous Solutions: Isotherms and Kinetics |
title_full |
Adsorption of Cr(VI) by Natural Clinoptilolite Zeolite from Aqueous Solutions: Isotherms and Kinetics |
title_fullStr |
Adsorption of Cr(VI) by Natural Clinoptilolite Zeolite from Aqueous Solutions: Isotherms and Kinetics |
title_full_unstemmed |
Adsorption of Cr(VI) by Natural Clinoptilolite Zeolite from Aqueous Solutions: Isotherms and Kinetics |
title_sort |
adsorption of cr(vi) by natural clinoptilolite zeolite from aqueous solutions: isotherms and kinetics |
publisher |
Sciendo |
series |
Polish Journal of Chemical Technology |
issn |
1899-4741 |
publishDate |
2017-09-01 |
description |
The main aim of this study was to evaluate the efficiency of natural zeolite for Cr(VI) removal from aqueous solutions. Following simple modification of adsorbent, the effect of operational parameters including pH (2–10), adsorbent dosage (2–20 g/L), contact time (5–150 min) and Cr(VI) concentration (10–50 mg/L) were studied according to one-factor-at-a-time procedure. The maximum Cr(VI) removal of 99.53% was obtained at initial pH of 2, contact time of 30 min, adsorbent dosage of 8 g/L and initial chromium concentration of 10 mg/L. The Freundlich isotherm was best fitted with experimental data (R2 = 0.951). Also, type 1pseudo second order kinetic model showed the most correlation (R2 = 1) with the experimental data. According to obtained results, it can be concluded that the application of clay-like adsorbents such as natural clinoptilolite zeolite can be considered as an efficient alternative for final treatment of effluents containing Cr(VI). |
topic |
adsorption clinoptilolite zeolite cr(vi) isotherm reaction kinetics |
url |
https://doi.org/10.1515/pjct-2017-0056 |
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