SBA-16: Application for the removal of neutral, cationic, and anionic dyes from aqueous medium

Chaudhuri, Haribandhu; Dash, Subhajit; Ghorai, Soumitra; Pal, Sagar; Sarkar, Ashis

doi:10.1016/j.jece.2015.11.020

Cited by 41 publications

(18 citation statements)

References 48 publications

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“…11,12 It was found that such hybrid composites have a high selectivity and capacity as well as show fast kinetics. 13−15 Chaudhuri et al 16 synthesized mesoporous chitin-and chitosan-based composites and applied the obtained composites as sorbents for dye removal from natural waters and wastewaters. Cho and coworkers 17 described adsorption of methylene blue and methyl orange by a magnetic composite material composed of nanomagnetite, heulandite, and cross-linked chitosan.…”

Section: Introductionmentioning

confidence: 99%

Chitosan–Silica Hybrid Composites for Removal of Sulfonated Azo Dyes from Aqueous Solutions

et al. 2018

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In this study, the influence of the chitosan immobilization method on the properties of final hybrid materials was performed. Chitosan was immobilized on the surface of mesoporous (ChS2) and fumed silica (ChS3) by physical adsorption and the sol-gel method (ChS1). It was found that physical immobilization of chitosan allows to obtain hybrid composites (ChS) with a homogeneous distribution of polymer on the surface, relatively wide pores, and specific surface area of about 170 m/g, pH = 5.7 for ChS3 and 356 m/g and pH = 6.0 for ChS2. The microporous chitosan-silica material with a specific surface area of 600 m/g and a more negatively charged surface (pH = 4.2) was obtained by the sol-gel reaction. The mechanisms of azo dye adsorption were studied, and the correlation with the composite structure was distinguished. The generalized Langmuir equation and its special cases, that is, Langmuir-Freundlich and Langmuir equations, were applied for the analysis of adsorption isotherm data. The adsorption study showed that physically adsorbed chitosan (ChS1 and ChS2) on a silica surface has a higher sorption capacity, for example, 0.48 mmol/g for the acid red 88 (AR88) dye (ChS2) and 0.23 mmol/g for the acid orange 8 (AO8) dye (ChS1), compared to the composite obtained by the sol-gel method [ChS1, 0.05 mmol/g for the AO8 dye]. For a deeper understanding of the behavior of immobilized chitosan in the adsorption processes, various kinetic equations were applied: first-order, second-order, mixed 1,2-order (MOE), multiexponential, and fractal-like MOE as well as intraparticle and pore diffusion model equations. In the case of AO8 dye, the adsorption rates were differentiated for three composites: for ChS3, 50% of the dye was removed from the solution after merely 5 min and almost 90% after 80 min. The slowest adsorption process controlled by the diffusion rate of dye molecules into the internal space of the pore structure was found for ChS1 (225 min halftime). In the case of ChS2, the rates for various dyes change in the following order: acid orange (AO7) > orange G (OG) > acid red 1 (AR1) > AR88 > AO8 (halftimes: 10.5 < 15.7 < 23.7 < 34.9 < 42.9 min).

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Section: Introductionmentioning

confidence: 99%

Chitosan–Silica Hybrid Composites for Removal of Sulfonated Azo Dyes from Aqueous Solutions

et al. 2018

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“…Highly-ordered mesoporous SBA-15 molecular sieves were synthesized and applied for the adsorption of cationic dyes such as methylene blue (MB) and Janus Green B [ 40 ]. SBA-16 [ 41 ] and Si-MCM-41 [ 42 ] materials have been reported as an excellent adsorbent for adsorption of cationic, neutral, and anionic dyes. Tsai et al [ 43 ] synthesized cubic mesoporous silica SBA-16functionalized with carboxylic acid for effective removal of cationic dyes.…”

Section: Introductionmentioning

confidence: 99%

Highly Efficient, Rapid, and Simultaneous Removal of Cationic Dyes from Aqueous Solution Using Monodispersed Mesoporous Silica Nanoparticles as the Adsorbent

et al. 2017

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In this work, a highly efficient and rapid method for simultaneously removing cationic dyes from aqueous solutions was developed by using monodispersed mesoporous silica nanoparticles (MSNs) as the adsorbents. The MSNs were prepared by a facile one-pot method and characterized by scanning electron microscopy, transmission electron microscopy, Fourier-transform infrared spectroscopy, and Brunauer-Emmett-Teller. Experimental results demonstrated that the as-prepared MSNs possessed a large specific surface area (about 585 m2/g), uniform particle size (about 30 nm), large pore volume (1.175 cm3/g), and narrow pore size distribution (1.68 nm). The materials showed highly efficient and rapid adsorption properties for cationic dyes including rhodamine B, methylene blue, methyl violet, malachite green, and basic fuchsin. Under the optimized conditions, the maximum adsorption capacities for the above mentioned cationic dyes were in the range of 14.70 mg/g to 34.23 mg/g, which could be achieved within 2 to 6 min. The probable adsorption mechanism of MSNs for adsorption of cationic dyes is proposed. It could be considered that the adsorption is mainly controlled by electrostatic interactions and hydrogen bonding between the cationic dyes and MSNs. As a low-cost, biocompatible, and environmentally friendly material, MSNs have a potential application in wastewater treatment for removing some environmental cationic contaminants.

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“…A similar trend for organic pollutants was reported by other authors. [15][16][17][18][19] The fact that natural waters and typical wastewaters have neutral pH, in the application of the LC-Al 2 O 3 hybrid for removing pollutants such as loperamide, there is no need for conditioning the pH value of water, so this is one of the greatest advantages of this material.…”

Section: Effect Of Phmentioning

confidence: 99%

BIOSORPTION OF LOPERAMIDE BY LIGNOCELLULOSIC-Al2O3 HYBRID: OPTIMIZATION, KINETICS, ISOTHERMAL AND THERMODYNAMIC STUDIES

Velinov¹,

Najdanović²,

Vučić³

et al. 2019

Cellulose Chem. Technol.

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Lignocellulosic biomass chemically modified with an inorganic oxide (Al 2 O 3) was tested as a new sorbent for the removal of drug loperamide from water. Waste biomass generated from Lagenaria vulgaris plant was used as a lignocellulosic raw material. The effects of initial pH, temperature, sorbent dosage, initial loperamide concentration and hydrodynamic conditions on the sorption process were studied. The highest removal efficiency of loperamide was observed at neutral pH (5-8) and reached 99.5%, which is the greatest advantage of this hybrid. The maximal sorption capacity of the material was 48.74 mg/g. Sorption kinetics suggested that both surface reaction and diffusion were ratelimiting steps. The calculated thermodynamic parameters showed that the sorption process was feasible, spontaneous and endothermic. Also, the removal of loperamide from the river water was successfully carried out. The present study suggests that the obtained lignocellulosic-Al 2 O 3 hybrid sorbent could be used effectively for the removal of loperamide from natural waters and wastewaters.

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SBA-16: Application for the removal of neutral, cationic, and anionic dyes from aqueous medium

Cited by 41 publications

References 48 publications

Chitosan–Silica Hybrid Composites for Removal of Sulfonated Azo Dyes from Aqueous Solutions

Chitosan–Silica Hybrid Composites for Removal of Sulfonated Azo Dyes from Aqueous Solutions

Highly Efficient, Rapid, and Simultaneous Removal of Cationic Dyes from Aqueous Solution Using Monodispersed Mesoporous Silica Nanoparticles as the Adsorbent

BIOSORPTION OF LOPERAMIDE BY LIGNOCELLULOSIC-Al2O3 HYBRID: OPTIMIZATION, KINETICS, ISOTHERMAL AND THERMODYNAMIC STUDIES

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