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Evaluation of Langmuir and Freundlich Isotherms for Removal of Cephalexin and Tetracycline Antibiotics By Sistan Sand from Water and Wastewater Samples
Abstract
In this research, Sistan sand was used as a natural and inexpensive sorbent for removal of cephalexin and tetracycline antibiotics from water and wastewater samples. For a concentration 60.0 mg L-1 of cephalexin, optimum removal conditions were: pH of the sample 3.0, adsorbent amount 1.0 g, contact time 20.0 min, added amount of sodium chloride to adjust the ionic strength of the solution 7.0 g L-1. Langmuir isotherm was the best fitted model for this adsorption process and adsorbent capacity was calculated to be 0.26 g g-1. This adsorbent was able to remove up to 68.1% of cephalexin from wastewater. In case of tetracycline, for a 90.0 mg L-1 of the analyte, the optimum adsorption conditions were achieved at pH 8.0, 1.0 g of sorbent, contact time of 35.0 min and ionic strength of the solution as sodium chloride of 7.0 g L-1. The isotherm was best in agreement with Freundlich model. Adsorbent capacity was 0.76 g g-1 and up to 76.2% of this antibiotic could be removed from wastewater.
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Authors (4)
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Sayedeh Samaneh Hasheminasab
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Sayyed Hossein Hashemi
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Mojtaba Sasani
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Details
- Category:
- Articles
- Type:
- artykuły w czasopismach
- Published in:
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Iranian Journal of Analytical Chemistry
no. 8,
pages 32 - 39,
ISSN: 2383-2207 - Language:
- English
- Publication year:
- 2021
- Bibliographic description:
- Kaykhaii M., Hasheminasab S. S., Hashemi S. H., Sasani M.: Evaluation of Langmuir and Freundlich Isotherms for Removal of Cephalexin and Tetracycline Antibiotics By Sistan Sand from Water and Wastewater Samples// Iranian Journal of Analytical Chemistry -Vol. 8,iss. 2 (2021), s.32-39
- DOI:
- Digital Object Identifier (open in new tab) 10.30473/ijac.2022.62515.1216
- Verified by:
- Gdańsk University of Technology
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