Renewable rarasaponin-bentonite-alginate composite with sponge-like structure and its application for crystal violet removal from aqueous solution

Laysandra, Livy, Fabryanty, Rizka, Santoso, Shella Permatasari, Soetaredjo, Felycia Edi, Kurniawan, Alfin and Ismadji, Suryadi (2019) Renewable rarasaponin-bentonite-alginate composite with sponge-like structure and its application for crystal violet removal from aqueous solution. Renewable rarasaponin-bentonite-alginate composite with sponge-like structure and its application for crystal violet removal from aqueous solution, 160 (31). pp. 354-365. ISSN 19443994, 19443986 Jurnal Internasional Bereputasi SJR(2020): 0.25, Q3, H-Index: 60

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Abstract

Adsorption is an efficient process for removing contaminants from water by using adsorbent. In this work, bentonite, rarasaponin, and sodium alginate are used as raw materials to prepare new composite to be applied to the adsorption of crystal violet dye. The prepared adsorbent (bentonite- rarasaponin-alginate composite) has a sponge-like appearance. The Fourier transform infrared (FTIR), X-ray diffraction (XRD), nitrogen (N2) sorption and scanning electron microscopy (SEM) methods were employed to characterize the prepared adsorbents. The adsorption experiments were conducted isothermally at 30,50, and 70°C. The Freundlich and Langmuir isotherm models were chosen to correlate the equilibrium adsorption data. Meanwhile, the adsorption kinetics was studied at 30°C, and the data were correlated by using the pseudo-first-order and pseudo-second-order. Based on the adsorption results, it was found that composite can adsorb crystal violet dye 3 times more than bentonite at all investigated temperatures, where at 70°C the adsorption capacity for acid-activated bentonite is 176.63 mg/g and for rarasaponin-bentonite-alginate composite is 476.04 mg/g. The adsorption of crystal violet dye onto the adsorbents increases with increasing temperature indicating that the chemisorption is dominant in this process.

Item Type: Article
Additional Information: Jurnal Internasional Bereputasi SJR(2020): 0.25, Q3, H-Index: 60
Uncontrolled Keywords: Acid activated bentonite; Rarasaponin; Sodium alginate; Composite; Isotherms; Kinetics
Subjects: Engineering > Chemical Engineering
Divisions: Journal Publication
Depositing User: F.X. Hadi
Date Deposited: 30 Jun 2022 08:46
Last Modified: 02 Aug 2022 05:22
URI: http://repository.ukwms.ac.id/id/eprint/30802

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