An investigation on the adsorption and removal performance of a carboxymethylcellulose-based 4-aminophenazone@MWCNT nanocomposite against crystal violet and brilliant green dyes

Raed H Althomali; Khalid A Alamry; Mahmoud A Hussein; R M Guedes

doi:10.1039/d2ra07321h

An investigation on the adsorption and removal performance of a carboxymethylcellulose-based 4-aminophenazone@MWCNT nanocomposite against crystal violet and brilliant green dyes

RSC Adv. 2023 Jan 31;13(7):4303-4313. doi: 10.1039/d2ra07321h.

Authors

Raed H Althomali¹, Khalid A Alamry¹, Mahmoud A Hussein^{1

2}, R M Guedes³

Affiliations

¹ Department of Chemistry, Faculty of Science, King Abdulaziz University Jeddah 21589 Saudi Arabia kaalamri@kau.edu.sa mahussein74@yahoo.com maabdo@kau.edu.sa.
² Chemistry Department, Faculty of Science, Assiut University Assiut 71516 Egypt.
³ LAETA-INEGI, DEMec, Mechanical Engineering Department, Faculty of Engineering of University of Porto (FEUP) Rua Dr Roberto Frias s/n 4200-465 Porto Portugal.

Abstract

The multistep chemical modification of carboxymethylcellulose (CMC) in the presence of 4-aminophenazone (A-PH) and multiwall carbon nanotubes (MWCNTs) has been successfully conducted. The environmental performance of this material has been thoroughly investigated. Crystal violet (CV) and brilliant green (BG) were eliminated by utilising a new hybrid nanocomposite material (A-PH-CMC/MWCNTs) from a simulated textile wastewater solution. Using SEM, EDX, XRD and FTIR spectroscopy methods, the detailed characterisation of A-PH-CMC/MWCNT nanocomposites was investigated. The results indicated that the adsorption capacity was dependent on six factors (e.g., contact duration, starting concentration, adsorbent mass, the effect of the solution pH, temperature and the effect of KNO₃). In addition, thermodynamic and regeneration studies have been reported. According to the theories of pseudo-second-order kinetics, the removal process involves chemical adsorption. The experimental results were best suited by the Langmuir model, in which maximum adsorption capacities of 20.83 and 22.42 mg g^-1 were predicted for the BG and CV dyes, respectively. The research is a preliminary case study demonstrating the excellent potential of A-PH-CMC/MWCNT nanocomposites as a material for CV and BG dye removal.