Application of chitosan beads as an effective biosorbent for orange G dye: characterization, optimization, and Equilibrium Studies
DOI:
https://doi.org/10.22399/ijcesen.5104Keywords:
Chitosan, Orange G dye, Box-Behnken design, AdsorptionAbstract
Chitosan beads (CTS) were prepared and studied in a batch mode operation for the adsorption of Orange G (OG) dye from aqueous solution. Characterization of the surface of CTS was achieved by using point of zero charge (pHpzc) method, Fourier transform infrared spectroscopy, and scanning electron microscopy. The effect of parameters such as adsorbent dosage (A: 0.02-0.06 g), pH (B: 4-10), time of contact (C: 5-45 min), and temperature (D: 30-60°C) on the color removal of OG was investigated using response surface methodology (RSM) based on Box–Behnken surface statistical design at an initial OG concentration, Co = 100 mg/L as a fixed input parameter. Results revealed that the highest removal (92.14 %) of OG dye was achieved by CTS at adsorbent dosage of 0.04g, solution of pH 4, temperature of 60 °C, and time of 25 min. The adsorption process followed the pseudo-second order (PSO) kinetic, and Freundlich isotherm models. The maximum adsorption capacity of CTS composite for OG dye was recorded to be 416.67 mg/g at 60 °C. This work introduces CTS as an ideal composite adsorbent for removal of textile dyes from the aqueous environment.
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