REMOVAL OF CADMIUM (Cd2+) FROM WATER BY POLYPHOSPHATE MODIFIED-CELLULOSE
Project no. 32085 · Status: Kapanmış · 2024
Summary
<p> In recent years, rapid population growth, unregulated urbanization, the increase in industrial facilities, and the rising demand for energy, water, and food as well as overconsumption have led to environmental pollution. Heavy metal pollution is a significant problem due to their toxicities. Cadmium ions (Cd2+), which contaminate water through various activities, cause serious environmental and health issues. In this study, a polyphosphate-bound cellulose sorbent was prepared and characterized. The parameters affecting the removal of Cd2+ ions from aqueous solutions (optimal sorbent amount, initial solution pH, optimum contact time initial Cd2+ concentration, temperature and interference of foreign ions) were investigated.</p><p> The results of the studies with the prepared polyphosphate-bound cellulose sorbent showed that the optimal sorbent amount was 0,05 g/25 mL and the optimal working pH was 6,0. Equilibrium study data were used in Langmuir and Freundlich isotherm models. Cd2+ adsorption onto polyphosphate-bound cellulose sorbent conformed to Langmuir isotherm model with a maximum adsorption capacity of 18,02 mg/g being determined. The removal of Cd2+ by the prepared sorbent was quite fast and reached equilibrium within 1 minute.</p><p> It was observed that in an environment where especially (+2) charged ions are 20 times more prevalent than cadmium ions, there is a decrease in the performance of the sorbent's removal.</p><p> In addition, polyphosphate-bound cellulose was found to be a green and renewable sorbent as it can be easily regenerated with 0,1 M HCl.</p><p> <strong>Keywords:</strong> Cadmium, cellulose, sodium tripolyphosphate, sorption, water treatment</p>