A Cost Effective Green Biosorbent Simarouba glauca Seed Shell for Removal of Rhodamine B from Aqueous Solutions

Jeyagowri, B.; Yamuna, R. T.

doi:10.14233/ajchem.2015.18764

Cited by 1 publication

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“…Adsorption technology is considered the most economically favorable technique to remove dyes among those available (i.e., membrane separation, oxidation, and irradiation) because of its high removal efficiency, low operation cost, and ability to separate a wide range of contaminants from industrial effluents. Various biosorbents derived from agricultural and industrial wastes have been efficiently applied to remove different types of dyes in the literature, such as acid, cationic, dispersive, direct, reactive, solvent, sulfur, and vat dyes (Annadurai et al, 2002;Gupta and Suhas, 2009;Contreras et al, 2012;Witek-Krowiak, 2013;Wang et al, 2014;Oladipo and Gazi, 2015;Roosta et al, 2015;Sadaf et al, 2015;Jeyagowri and Yamuna, 2016;Tahir et al, 2017). Although the removal efficiencies of biosorbents are lower than that of activated carbon, the industrial-scale utilization of these materials is economically attractive (Contreras et al, 2012).…”

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confidence: 99%

Insight into the adsorption mechanism of cationic dye onto biosorbents derived from agricultural wastes

Tran

You

Nguyễn

et al. 2017

Chemical Engineering Communications

137

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This study investigated the phenomenon and mechanism of adsorption of methylene green 5 (MG5) on three pristine biosorbents: golden shower pod (GS), coconut shell (CC), and orange peel (OP). The results showed that the biosorbents possessed low specific surface areas, but abundant functional groups. Adsorption was strongly affected by the solution's pH and ionic strength. As revealed in the kinetic study, equilibrium was rapidly established, requiring low activation energies; a removal rate of 30%-87% was achieved within 1 min. The maximum Langmuir adsorption capacities at 30 °C exhibited the following order: GS (106 mg/g) > OP (92 mg/g) > CC (59 mg/g). Thermodynamic experiments suggested that the adsorption occurred spontaneously (-ΔG°) and exothermically (-ΔH°). The primary adsorption mechanisms involved electrostatic attraction, hydrogen bonding formations, and n-π interaction. Thermogravimetric analysis revealed that three biopolymer components (i.e., hemicellulose, cellulose, and lignin) played controlling roles in the adsorption process. Thus, these three agricultural residues can be considered potential low-cost adsorbents for efficient dye adsorption applications.

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