Biocomposite hydrogel beads from glutaraldehyde-crosslinked phytochemicals in alginate for effective removal of methylene blue

Andreas, -, Winata, Zefanya Gerald, Santoso, Shella Permatasari, Angkawijaya, Artik Elisa, Yuliana, Maria, Soetaredjo, Felycia Edi, Ismadji, Suryadi, Hsu, Hsien-Yi, Go, Alchris Woo and Ju, Yi-Hsu (2021) Biocomposite hydrogel beads from glutaraldehyde-crosslinked phytochemicals in alginate for effective removal of methylene blue. Biocomposite hydrogel beads from glutaraldehyde-crosslinked phytochemicals in alginate for effective removal of methylene blue, 329 (1). p. 571159. ISSN 01677322, 18733166, Jurnal Internasional Bereputasi SJR(2020): 0.93, Q1, H-Index: 111

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Abstract

Phytochemicals, i.e., flavonoids, phenolics, and anthocyanin, extracted from red cabbage, were crosslinked with alginate to prepare biocomposite hydrogel beads (BHB). The preparation of BHB involved three consecutive steps: (1) extraction and solvent reduction of phytochemicals from red cabbage, (2) crosslinking of phytochemicals into alginate matrix using glutaraldehyde, and (3) formation of the hydrogel beads in CaCl2 solution. The resulting BHB sorbentswere characterized using scanning electron microscopy (SEM), Fourier transforminfrared spectroscopy (FTIR), and X-ray diffraction (XRD) analyses. The cross-section structure of the BHBwas confirmed from the SEMimages. The alteration of FTIR peaks implied the success of the crosslinking of phytochemical compounds into the alginate. The adsorption equilibriumand kinetic studies of BHB were conducted using basic blue 9 (BB9) as themodel adsorbate. FTIR characterization of the BHB post-adsorption reveals the functional groups of the adsorbent involved in the dye adsorption. The calculated adsorption isotherm, kinetics, and thermodynamic parameters showgood agreement with the characterization results of adsorbate post-adsorption. The adsorption isotherm is being in congruence with the Langmuir model, and the highest adsorption capacity recorded was 1442.0 mg g−1 at 323 K and pH of 11.0. Adsorption kinetics was better fitted to the pseudo 1st order model than the pseudo 2nd order and Elovich models,which further support the dye physisorption behavior. The initial adsorption rate was influenced by the rapid surface adsorption followed by intraparticle diffusion. The thermodynamic parameters show the spontaneity of the adsorption, and the adsorption proceeds endothermically. The cost analysis shows the economic feasibility of BHB sorbent production for adsorption applications.

Item Type: Article
Additional Information: Jurnal Internasional Bereputasi SJR(2020): 0.93, Q1, H-Index: 111
Uncontrolled Keywords: Alginate bead Red cabbage extract Phytochemicals Adsorption methylene blue Intraparticle diffusion
Subjects: Engineering > Chemical Engineering
Divisions: Journal Publication
Depositing User: F.X. Hadi
Date Deposited: 13 Jul 2022 03:39
Last Modified: 02 Dec 2022 08:25
URI: http://repository.ukwms.ac.id/id/eprint/31430

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