Analytical Methods in Environmental Chemistry Journal
AMECJ

Magnetic bentonite nanocomposite for removal of amoxicillin from wastewater samples using response surface methodology before determination by high performance liquid chromatography

Document Type : Original Article

Authors

Mohammad Reza Rezaei Kahkha 1
Ali Faghihi Zarandi 2
Nahid Shafighi 3
Saeedeh Kosari 3
Batool Rezaei Kahkha 3

1 Zabol University Of Medical Sciences

2 Department of Occupational Health Engineering, Faculty of Health, Kerman University of Medical Sciences, Kerman. Iran

3 Department of Environmental Health Engineering, Faculty of Health, Zabol University of Medical Sciences, Zabol.Iran

https://doi.org/10.24200/amecj.v3.i03.108
Abstract
Antibiotics and pharmaceutical products cannot remove by conventional sewage treatment. In this work, an effective adsorbent Magnetic Multiwalled Carbon nanotube (MMWCNTs) was synthesized by co-precipitation of MWCNTs with Fe3O4 and used for removal of Amoxicillin from aqueous solutions. Response surface methodology on Central Composition Design (CCD) was applied for designing of experiments and building of models. Four factors including pH, adsorbent dose, time, and temperature were studied and used for the quadratic equation model to the prediction of optimal points.  By solvent the equation and considering the regression coefficient (R2 =0.99) the optimal points obtained as follows: pH =2.98; adsorbent dosage =2.16 g; time =22 min and temperature = 37.88 o C. Isotherm study of adsorption showed that the adsorption of amoxicillin onto MMWCNTs follows the Langmuir model. The maximum adsorption capacity is 215 mg g-1 obtained from Langmuir isotherm. 

Graphical Abstract

Magnetic bentonite nanocomposite for removal of amoxicillin from wastewater samples using response surface methodology before determination by high performance liquid chromatography

Keywords

High performance liquid chromatography
Amoxicillin removal
Response surface methodology (RSM)
Central composition design
Magnetic bentonite nanocomposite
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Analytical Methods in Environmental Chemistry Journal
Volume 3, Issue 3
Summer 2020
Pages 25-31