Development of sustainable dye adsorption system using nutraceutical industrial fennel seed spent—studies using Congo red dye

Taqui, Syed Noeman and Yahya, Rosiyah and Hassan, Aziz and Nayak, Nayan and Syed, Akheel Ahmed (2017) Development of sustainable dye adsorption system using nutraceutical industrial fennel seed spent—studies using Congo red dye. International Journal of Phytoremediation, 19 (7). pp. 686-694. ISSN 1549-7879

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Abstract

ABSTRACTFennel seed spent (FSS)—an inexpensive nutraceutical industrial spent has been used as an efficient biosorbent for the removal of Congo red (CR) from aqueous media. Results show that the conditions for maximum adsorption would be pH 2-4 and 30°C were ideal for maximum adsorption. Based on regression fitting of the data, it was determined that the Sips isotherm (R2 = 0.994, χ2 = 0.5) adequately described the mechanism of adsorption, suggesting that the adsorption occurs homogeneously with favorable interaction between layers with favorable interaction between layers. Thermodynamic analysis showed that the adsorption is favorable (negative values for ΔG°) and endothermic (ΔH° = 12–20 kJ mol−1) for initial dye concentrations of 25, 50, and 100 ppm. The low ΔH° value indicates that the adsorption is a physical process involving weak chemical interactions like hydrogen bonds and van der Waals interactions. The kinetics revealed that the adsorption process showed pseudo-second-order tendencies with the equal influence of intraparticle as well as film diffusion. The scanning electron microscopy images of FSS show a highly fibrous matrix with a hierarchical porous structure. The Fourier transform infrared spectroscopy analysis of the spent confirmed the presence of cellulosic and lignocellulosic matter, giving it both hydrophilic and hydrophobic properties. The investigations indicate that FSS is a cost-effective and efficient biosorbent for the remediation of toxic CR dye.

Item Type:	Article
Additional Information:	Nutraceutical Industrial Fennel Seed Spent, Congo Red, Adsorption Studies
Subjects:	C Chemical Science > Chemistry
Divisions:	Department of > Chemistry
Depositing User:	C Swapna Library Assistant
Date Deposited:	26 Jun 2019 10:28
Last Modified:	26 Jun 2019 10:28
URI:	http://eprints.uni-mysore.ac.in/id/eprint/3893

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