Sorption behavior of methylene blue from aqueous solution by raphia fibers

Staroń, Paweł; Chwastowski, Jarosław; Banach, Marcin

doi:10.1007/s13762-019-02446-9

Cited by 27 publications

(16 citation statements)

References 26 publications

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“…Some studies on adsorbing performance of various materials for the studied dyes and the corresponding maximum adsorption capacities have been reported [ 25 , 26 , 33 , 36 , 60 , 61 , 62 , 63 , 64 , 65 , 66 ], which are listed in Table 4 . Compared with referred materials, the mesoporous carbons obtained by impregnation of well-organized silicas proved to be similar or even more efficient adsorbents.…”

Section: Resultsmentioning

confidence: 99%

Mesoporous Carbons of Well-Organized Structure in the Removal of Dyes from Aqueous Solutions

et al. 2021

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Mesoporous carbons with differentiated properties were synthesized by using the method of impregnation of mesoporous well-organized silicas. The obtained carbonaceous materials and microporous activated carbon were investigated by applying different methods in order to determine their structural, surface and adsorption properties towards selected dyes from aqueous solutions. In order to verify applicability of adsorbents for removing dyes the equilibrium and kinetic experimental data were measured and analyzed by applying various equations and models. The structural and acid-base properties of the investigated carbons were evaluated by Small-Angle X-ray Scattering (SAXS) technique, adsorption/desorption of nitrogen, potentiometric titration, and Transmission Electron Microscopy (TEM). The results of these techniques are complementary, indicating the type of porosity and structural ordering, e.g., the pore sizes determined from the SAXS data are in good agreement with those obtained from nitrogen sorption data. The SAXS and TEM data confirm the regularity of mesoporous carbon structure. The adsorption experiment, especially kinetic measurements, reveals the utility of mesoporous carbons in dye removing, taking into account not only the adsorption uptake but also the adsorption rate.

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Section: Resultsmentioning

confidence: 99%

Mesoporous Carbons of Well-Organized Structure in the Removal of Dyes from Aqueous Solutions

et al. 2021

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“…To investigate the adsorption isotherms, the experimental data were analyzed by using three experience isothermal adsorption models, including the Freundlich isothermal adsorption model [ 37 ], the Langmuir isothermal adsorption model [ 38 ], and the Temkin isothermal adsorption model [ 39 , 40 ].…”

Section: Resultsmentioning

confidence: 99%

High-Performance Hydrogel Adsorbent Based on Cellulose, Hemicellulose, and Lignin for Copper(II) Ion Removal

et al. 2021

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Cellulose, hemicellulose, and lignin are three kinds of biopolymer in lignocellulosic biomass, and the utilization of the three biopolymers to synthesize hydrogel adsorbent could protect the environment and enhance the economic value of the biomass. A novel hydrogel adsorbent was prepared using cellulose, lignin, and hemicellulose of wheat straw by a one-pot method, and the adsorbent showed excellent adsorption performance for copper(II) ions. Scanning electron microscopy and Fourier transform infrared spectroscopy analysis showed that the prepared straw-biopolymer-based hydrogel had porous structure, and cellulose fibrils had crosslinked with lignin and hemicellulose by poly(acrylic acid) chains. The effects of contact time, initial concentration, and temperature on the copper(II) ion removal using the prepared hydrogels were investigated, and the obtained results indicated that the adsorption kinetics conformed to the pseudo-second-order and Elovich equation models and the adsorption isotherm was in accord with the Freundlich model. The adsorption thermodynamics study indicated that the adsorption process was spontaneous and accompanied by heat. X-ray photoelectron spectroscopy analysis revealed that the adsorption behavior resulted from ion exchange. The prepared hydrogel based on cellulose, hemicellulose, and lignin could be used for water treatment and soil remediation because of its high performances of excellent heavy metal ion removal and water retention.

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“…The pseudo-second-order model is based on the assumption that the chemisorption is the rate-limiting step during the adsorption process [ 39 ]. The low values of the rate constant ( k 2 ) in the pseudo-second-order model suggested that the adsorption rate was primarily affected by the number of unoccupied functional groups on the adsorbent and the rate of adsorption decreased with the increasing contact time [ 40 , 41 , 42 ].…”

Section: Resultsmentioning

confidence: 99%

Development of Pectin-Based Aerogels with Several Excellent Properties for the Adsorption of Pb2+

Wang

Shuai

et al. 2021

Foods

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Traditional aerogels lack specific functional groups for the adsorption of Pb2+, which results in a low adsorption capacity and limits the application scope. Novel porous pectin-based aerogels (PPEAs) were prepared by incorporating polyethylenimine (PEI) using ethylene glycol diglycidyl ether (EGDE) as a cross-linker for the removal of Pb2+ from water. The cross-linking mechanism, morphology, mechanical strength, thermal stability, adsorption properties, and mechanism of the aerogels were investigated. The aerogels possessed several desirable features, such as a large maximum Pb2+ adsorption capacity (373.7 mg/g, tested at pH 5.0), ultralight (as low as 63.4 mg/cm3), high mechanical strength (stress above 0.24 MPa at 50% strain), and easy recyclability. Meanwhile, the equilibrium adsorption data was well described by the Langmuir–Freundlich (Sips) model and the kinetic adsorption process was well fitted using the pseudo-second-order model. The donor groups, such as -NH2, and oxygen-containing functional groups were responsible for the Pb2+ adsorption, which was confirmed by the FTIR and XPS analysis. The excellent characteristics mean that PPEAs are highly effective adsorbents in the remediation of lead-containing wastewater.

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Sorption behavior of methylene blue from aqueous solution by raphia fibers

Cited by 27 publications

References 26 publications

Mesoporous Carbons of Well-Organized Structure in the Removal of Dyes from Aqueous Solutions

Mesoporous Carbons of Well-Organized Structure in the Removal of Dyes from Aqueous Solutions

High-Performance Hydrogel Adsorbent Based on Cellulose, Hemicellulose, and Lignin for Copper(II) Ion Removal

Development of Pectin-Based Aerogels with Several Excellent Properties for the Adsorption of Pb2+

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