High-Performance Hydrogel Based on Modified Chitosan for Removal of Heavy Metal Ions in Borehole: A Case Study from the Bahariya Oasis, Egypt

Globally, there is a rising demand for water purification. This driven by numerous factors, including economic growth, increasing population, shortage, and deterioration of quality. The current work highlights the manufacturing environmentally friendly highly efficient sorbent based on chitosan nanoparticles after successive crosslinking (using glutaraldehyde) modification through grafting 4-aminoazobenzene-3,4?-disulfonic acid (AZDS) as source sulfonic groups. First, produced was thoroughly specified using FTIR, TGA, SEM, SEM-EDX, pHpzc, BET (nitrogen sorption desorption isotherms), elemental analyses (EA). tested Fe(III) before application to contaminated iron well samples. Next, improved sulfonation process conducted under selected experimental conditions within 25 20 min with maximum capacity 2.7 3.0 mmol Fe g?1 in visible light UV, respectively. Then, uptake kinetics both techniques were fitted pseudo-first-order rate equation (PFORE), which effect resistance intraparticle diffusion has remained an unneglected factor, while Langmuir isotherms. After that, achieved 0.2 M hydrochloric solution, fast process; 15 sufficient complete desorption. shows high selectivity heavy metal ions compared representative elements. Finally, used removal from Bahariya Oasis appeared be even diluted solution. Accordingly, it can implemented task treatment.