2024/10/03 by Miyah, Youssef, Ssouni, S., Benjelloun, M. +5
paper · doi:10.48317/imist.prsm/morjchem-v12i4.51596
Water contamination by organic dyes threatens the environment and public health, leading to a deterioration in water quality and risks to living beings. The search for innovative materials with large specific surface areas, such as chitin, for removing Crystal Violet (CV) and Congo Red (CR) dyes remains a crucial challenge for many industries, particularly textiles. Chitin has been characterized by FTIR, XRD, SEM-EDX, and zero charge point (pHpzc). This study aims primarily to evaluate the effectiveness of chitin as an adsorbent for the depollution of water contaminated by the organic dyes CV and CR. The pH, adsorbent dose, and initial dye concentration were optimized using Box Behnken experimental designs. Adsorption rates on the chitin surface were found to be 82.15% for CR at pH = 2 and 99.47% for CV at pH = 12, both at dyes concentrations of 20 mg L-1 and an adsorbent dose of 1.5 g L-1. In addition, chitin showed outstanding performance in the barley germination test, underscoring its potential applications in agriculture. The ability to recover and regenerate adsorbent is an economic and environmental key feature of this process.