Open AccessMagnetic bentonite nanocomposite for removal of amoxicillin from wastewater samples using response surface methodology before determination by high performance liquid chromatography
Author(s) -
Mohammad Reza Rezaei Kahkha,
Ali Faghihi Zarandi,
Nahid Shafighi,
Saeedeh Kosari,
Batool Rezaei Kahkha
Publication year - 2020
Publication title -
analytical methods of environmental chemistry journal
Language(s) - English
Resource type - Journals
eISSN - 2645-5552
pISSN - 2645-5382
DOI - 10.24200/amecj.v3.i03.108
Subject(s) - adsorption , response surface methodology , langmuir adsorption model , aqueous solution , bentonite , langmuir , chromatography , materials science , precipitation , coefficient of determination , chemistry , nuclear chemistry , chemical engineering , mathematics , organic chemistry , physics , meteorology , engineering , statistics
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.