Journal Article

Removal of organic contamination from wastewater using granular activated carbon modified—Polyethylene glycol: Characterization, kinetics and isotherm study

Rezakazemi, Mashallah, Khosrowshahi, Mobin Safarzadeh, Salehi, Mohammad Mehdi, Maleki, Ali, Elkamel, Ali, AlHammadi, Ali A., Choopani, Leila, Mashhadimoslem, Hossein

2024

Overview

To effectively remove Diazinon (DZ), Amoxicillin (AMX), and Crystal Violet (CV) from aquatic environments, a novel granular activated carbon (GAC) modified with Polyethylene glycol 600 (PEG) was created and manufactured. The chemical properties were investigated using a variety of characteristic analyses, including FT-IR, XRD, FESEM, and N 2 adsorption/desorption. The effectiveness of GAC-PEG’s adsorption for the removal of DZ, AMX, and CV was assessed under a variety of conditions, including a pH of 4–9 for the solution, 0.003–0.05 g doses of adsorbent, 50–400 ppm starting concentration, and a reaction time of 5–25 min. For DZ, AMX, and CV adsorption, the maximum adsorption capacity (Q max ) was 1163.933, 1163.100, and 1150.300 mg g- 1 , respectively. The Langmuir isotherm described all of the data from these adsorption experiments, and the pseudo-second-order well explains all-adsorption kinetics. Most contacts between molecules, electrostatic interactions, π–π interactions, hydrogen bonding, and entrapment in the modified CAG network were used to carry out the DZ, AMX, and CV adsorption on the GAC-PEG. The retrievability of the prepared adsorbent was successfully investigated in studies up to two cycles without loss of adsorption efficiency, and it was shown that it can be efficiently separated.

• Publisher: Public Library of Science,Public Library of Science (PLoS)
• Subject: Activated carbon / Adsorbents / Adsorption / Amoxicillin / Amoxicillin - chemistry / Antibiotics / Aquatic environment / Aqueous solutions / Carbon / Charcoal - chemistry / Chemical properties / Contamination / Diazinon / Earth Sciences / Ecology and Environmental Sciences / Efficiency / Electrostatic properties / Entrapment / Environment / Environmental aspects / Fungicides / Gentian violet / Gentian Violet - chemistry / Gentian Violet - isolation & purification / Hydrogen / Hydrogen bonding / Hydrogen-Ion Concentration / Insecticides / Isotherms / Kinetics / Morphology / Natural resources / Organic contaminants / Penicillin / Physical Sciences / Pollutants / Polyethylene glycol / Polyethylene Glycols - chemistry / Purification / Spectroscopy, Fourier Transform Infrared / Spectrum analysis / Tetracycline / Tetracyclines / Trinucleotide repeats / Wastewater / Wastewater - chemistry / Wastewater treatment / Water / Water Pollutants, Chemical - chemistry / Water Pollutants, Chemical - isolation & purification / Water Purification - methods