Poly (hydroxamic acid) ligand from cornstalk cellulose for heavy metal recovery from electroplating wastewater

Md Lutfor Rahman and Umi Aisyah Mahani and Kalsum Ahmad Mustamin and Mohd Sani Sarjadi and Sazmal Effendi Arsad and Shaheen M. Sarkar and Sandeep Kumar (2024) Poly (hydroxamic acid) ligand from cornstalk cellulose for heavy metal recovery from electroplating wastewater. Sustainable Chemistry and Pharmacy, 43. pp. 1-16. ISSN 2352-5541

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Abstract

In this study, a graft copolymerization was performed using the acrylic monomer onto cellulose derived from cornstalk. Thus, cellulose-graft-poly(methyl acrylate) (PMA) was prepared by a free radical reaction. Further, the poly(hydroxamic acid) ligand was created from PMA-grafting copolymer with hydroxylamine in an alkaline medium. Characterization techniques such as FT-IR, FE-SEM and thermogravimetric analysis (TGA) analysis were performed with the desired products such as cellulose, PMA-grafted cellulose and poly(hydroxamic acid). This study examined the performance of heavy metals removal from an aqueous solution using the poly(hydroxamic acid) ligand. The impact of several factors, such as pH, metal ion concentration and agitation period were studied using the batch adsorption approach of several metal ions (Cu²⁺, Fe²⁺, Co²⁺, Cr³⁺ and Ni²⁺). This ligand showed attractive sorption capacity with Cu²⁺ ions, obtained a maximal capacity of 331 mg g−1 at optimal pH 6. Among other metals also showed satisfactory adsorption capacity for Fe²⁺, Co²⁺, Cr³⁺ and Ni²⁺ were 290, 251, 230 and 210 mg g⁻¹, respectively. On the other hand, results demonstrated that adsorption by the poly(hydroxamic acid) ligand is regulated by the pH of the solution. The adsorption isotherm study is well explained by the Freundlich model with a high correlation coefficient value (R2 > 0.99). The experimental results suggest that the cornstalk cellulose-based poly(hydroxamic acid) ligand exhibits a heterogeneous surface, resulting in multiple layers formation on its surface. The heavy metals adsorption process followed the pseudo-second-order kinetic model (R2 > 0.997). This polymer ligand is capable of outstanding toxic metals removal magnitude, up to 90–98% from industrial wastewater. The implementation of a poly(hydroxamic acid) ligand derived from cellulosic materials as an adsorbent for metal ion extraction exhibits a promising approach.

Item Type:	Article
Keyword:	Adsorption, Waste fiber, Poly, hydroxamic acid, Wastewater, Heavy metals
Subjects:	Q Science > QD Chemistry > QD1-999 Chemistry > QD241-441 Organic chemistry T Technology > TD Environmental technology. Sanitary engineering > TD1-1066 Environmental technology. Sanitary engineering > TD201-500 Water supply for domestic and industrial purposes > TD419-428 Water pollution
Department:	FACULTY > Faculty of Science and Natural Resources
Depositing User:	SITI AZIZAH BINTI IDRIS -
Date Deposited:	18 Jul 2025 14:00
Last Modified:	18 Jul 2025 14:00
URI:	https://eprints.ums.edu.my/id/eprint/44565

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