Cu(II) removal from water using diethylenetriaminepentaacetic acid-modified cellulose
Project no. 32538 · Status: Kapanmış · 2024
Summary
<p>In this study, the removal of copper (Cu2+) ions from aqueous solutions was investigated using diethylenetriaminepentaacetic acid (DTPA)-modified cellulose-based sorbent. Batch experiments were conducted to evaluate the effects of key parameters including sorbent dosage, solution pH, and contact time on Cu2+ removal efficiency.</p><p>The results demonstrated that the optimal conditions for Cu2+ removal were achieved with 0.1 g sorbent per 25 mL solution at pH 5-6. The sorbent exhibited exceptionally fast adsorption kinetics, reaching equilibrium within just 10 minutes. Isotherm studies revealed that the adsorption process followed the Langmuir model, with a maximum theoretical capacity of 4.0890 mg/g. Thermodynamic analysis indicated the endothermic nature of the adsorption process (ΔH° = 6.05 kJ/mol).</p><p>Regeneration studies using 0.1 M HCl solution showed excellent recovery efficiency of 99%. Selectivity tests demonstrated the sorbent's high affinity for Cu2+, although competitive ions like Ca²⁺ and Mg²⁺ caused a slight reduction in removal efficiency.</p><p>This study presents DTPA-modified cellulose as an effective, rapid, and regenerable sorbent for Cu2+ removal from aqueous solutions, with potential applications in water treatment processes.</p><p><strong>Keywords:</strong> Cellulose modification, copper removal, DTPA, adsorption, water treatment, heavy metals</p>