Removal of heavy metal ions from wastewater using modified cornstalk cellulose-derived poly(amidoxime) ligand

Md Lutfor Rahman and Siti Aisyah Shamrih and Nurul Afifah Azly and Mohd Sani Sarjadi and Sazmal Effendi Arsad and Shaheen M. Sarkar and Sandeep Kumar (2024) Removal of heavy metal ions from wastewater using modified cornstalk cellulose-derived poly(amidoxime) ligand. Carbohydrate Polymer Technologies and Applications, 9. pp. 1-14. ISSN 2666-8939

Text FULL TEXT.pdf Restricted to Registered users only Download (6MB) | Request a copy

Abstract

The use of modified cellulose for the removal of heavy metal ions is a promising method to enhance the efficiency of metal ion extraction from water. In this study, cellulose was grafted with acrylonitrile to produce a polyacrylonitrile-grafted cellulose. This product was further converted into a poly(amidoxime) ligand through amidoximation. The structures of the cellulose, grafted cellulose, and poly(amidoxime) ligand were characterized using FT-IR, FE-SEM, and thermogravimetric analysis (TGA). A batch adsorption study was conducted to assess the polymer ligand’s ability to adsorb heavy metal ions, including Cu²⁺, Fe²⁺, Co²⁺, Cr³⁺, and Ni²⁺. The poly (amidoxime) ligand demonstrated exceptional Cu²⁺ adsorption capacity, primarily due to the complexation of amidoxime functional groups, with a maximum adsorption capacity of 310 mg g⁻¹ at an optimal pH of 6. Adsorption behavior was found to be pH-dependent, with various metal concentrations tested at a constant pH of 6. The Cu²⁺ ions exhibited highest adsorption capacity, followed by Fe²⁺, Co²⁺, Cr³⁺, and Ni²⁺, with adsorption capacities of 280, 240, 220, and 205 mg g⁻¹, respectively. The adsorption isotherms were well described by the Freundlich model, showing a high correlation coefficient (R² > 0.99), indicating a heterogeneous adsorption surface capable of forming multiple layers on the polymer ligand. Additionally, the adsorption kinetics followed a pseudo-second-order model (R² > 0.997). This poly(amidoxime) ligand was able to remove 90–98 % of toxic metals from industrial wastewater, highlighting its potential for large-scale environmental applications. The development of poly(amidoxime) ligands from cellulosic materials offers a sustainable and eco-friendly approach to heavy metal ion extraction.

Item Type:	Article
Keyword:	Adsorption. Waste fiber. Poly, amidoxime. Wastewater Heavy metals
Subjects:	Q Science > Q Science (General) > Q1-390 Science (General) T Technology > TD Environmental technology. Sanitary engineering > TD1-1066 Environmental technology. Sanitary engineering
Department:	FACULTY > Faculty of Science and Natural Resources
Depositing User:	SITI AZIZAH BINTI IDRIS -
Date Deposited:	07 Apr 2025 12:13
Last Modified:	07 Apr 2025 12:13
URI:	https://eprints.ums.edu.my/id/eprint/43382

Actions (login required)

View Item