Grafted Amberlite 200C Resin for Enhanced Salicylic Acid Adsorption

• Published in: Journal of water chemistry and technology 2024-12, Vol.46 (6), p.543-553
• Main Authors: Fairouz Saad Saoud, Berbar, Yassine, Amara, Mourad
• Format: Article
• Language: English
• Subjects: Adsorption; Amberlite (trademark); Ammonium; Ammonium compounds; Aquatic Pollution; Aromatic compounds; Cations; Chemical reactions; Chemical synthesis; Earth and Environmental Science; Environment; Hydrazine; Hydrazines; Industrial Chemistry/Chemical Engineering; Molecular structure; Nitration; Phosphates; Physical Chemistry of Water Treatment Processes; Resins; Salicylic acid; Sulfuric acid; Waste Water Technology; Water Industry/Water Technologies; Water Management; Water Pollution Control; Water Quality/Water Pollution
• ISSN: 1063-455X; 1934-936X
• DOI: 10.3103/S1063455X24060110

Removing relatively concentrated salicylic acid (SA) from pharmaceutical aqueous waste was performed using unmodified and modified commercial cationic exchange resin (Amberlite 200C). The modification of the resin involved grafting functional molecules onto the aromatic ring through classical organic reactions or by irreversible adsorption into the resin’s structure. The nitro group ( ) was synthesized by combining nitric and sulfuric acids and then attached to the resin matrix through nitration. Meanwhile, 2,4-dinitrophenyl hydrazine (DNPH), tributyl phosphate (TBP), and ammonium ( ) were irreversibly adsorbed onto the resin matrix via immersion. Consequently, the unmodified resin achieved a 21% elimination of the initial SA, whereas modified resins significantly increased the elimination yield. Specifically, and DNPH-modified resins achieved SA elimination rates of 51.94 and 41.5%, respectively. However, the use of TBP and modified resins resulted in negligible SA removal. The optimal conditions for operation were determined to be: pH 5.5, temperature 21°C, and a contact time of 20 min.