Synthesis and characterization of eco-friendly cellulose beads for copper (II) removal from aqueous solutions

Maaloul, Najeh; Oulego, Paula; Rendueles, Manuel; Ghorbal, Achraf; Dı́az, Mario

doi:10.1007/s11356-018-3812-2

Cited by 35 publications

(13 citation statements)

References 80 publications

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“…∆G 0 shows the standard free energy changes in J/mol.K. ∆H• and ∆S• represent enthalpy and entropy, respectively, in J/mol.K; R shows gas constant in terms of 314 J/mol.K; T denotes the absolute temperature in terms of Kelvin; and finally, K c indicates equilibrium and scaleless stability (29).…”

Section: Thermodynamic Methods Of Absorptionmentioning

confidence: 99%

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Lignocellulose Nanofiber Media for the Enhanced Removal of Copper From Aqueous Solutions

Rastegar

Ghaffari

Hoseini

2021

Avicenna J Environ Health Eng

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Nowadays, the entry of heavy metals entry into aqueous environments has jeopardized the health of human societies. The experiment was conducted in discontinuous conditions, and the study focused on examining the effect of five parameters including initial concentration, temperature, contact time, pH, and adsorbent dose on the adsorption of Cu heavy metals. In addition, the two-parameter models of Langmuir, Freundlich, Temkin, and Dubinin-Radushkevich were studied and compared to evaluate isothermal absorption. The highest correlation coefficients were obtained for Freundlich (0.969) and Dubinin-Radushkevich (0.9603) models. Finally, thermodynamic parameters such as enthalpy and entropy changes and Gibbs-free energy were calculated as well. The pH parameters, adsorption dose, contact time, temperature, and initial Cu concentrations in the discontinuous system had a statistically significant effect on the adsorption process. The results showed that the maximum efficiency of Cu adsorption by Lignocellulose nanofiber (LCNF) occurred at the pH of 6, contact time of 60 minutes, the ambient temperature of 25°C, and adsorption dose of 0.2 g. In the case of adsorption kinetics, the pseudo-second order model and intra-particle diffusion had more fitness with the experimental data indicating a chemical equilibrium between the adsorbate and the absorbent. Thermodynamic studies demonstrated that the process (negative ΔG) is spontaneous (negative ΔG), endothermic (negative ΔH), and non-random (positive ΔS). Thus, LCNF can be used as an effective adsorbent in the removal of metals by having an extremely high surface area.

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Section: Thermodynamic Methods Of Absorptionmentioning

confidence: 99%

“…2b depicts adsorption. As shown, the wide cm -1 courier 3444.24 belongs to the O-H factor group (29). The weak peak at 2925.48 cm -1 can be related to the C-H bending vibration due to the presence of alkynes and alkanes in the fibers (28).…”

Section: The Adsorbent Analysis With Ftirmentioning

confidence: 99%

Lignocellulose Nanofiber Media for the Enhanced Removal of Copper From Aqueous Solutions

Rastegar

Ghaffari

Hoseini

2021

Avicenna J Environ Health Eng

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“…The model of Redlich-Peterson (Eq. 9 [26]) supposes an adsorption with constant enthalpies and also constant adsorption energies as a homogeneous monolayer [26].…”

Section: Accepted Manuscriptmentioning

confidence: 99%

The use of encapsulation as a proposed solution to avoid problems encountered with conventional materials in powder form: Application in methylene blue removal from aqueous solutions

Guediri

Bouguettoucha

Chebli

et al. 2020

Journal of Molecular Liquids

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The Ziziphus jujuba stones chemically modified with orthophosphoric acid (PZJS), then encapsulated with sodium alginate (BZJS1 and BZJS2) were used for organic dye adsorption.In this context, the basic dye methylene blue (MB) was chosen as a test molecule. The characteristics of the prepared beads were examined by different characterization techniques, such as Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), energy dispersive X-ray diffraction (EDX), X-ray fluorescence (XRF), Thermogravimetr ic analysis (TGA) and Brunauer-Emmett-Teller method (BET) with nitrogen adsorptiondesorption isotherm at 77°K. In a batch system, initial pH (2-12), temperature (10, 25, 30 and A c c e p t e d m a n u s c r i p t 2 40 °C), initial concentration (50-200 mg/L), contact time, salt and organic compound effects were studied. The obtained results showed that the maximum MB adsorption amounts were 737.13 mg/g and 660.12 mg/g onto BZJS1 and BZJS2 at ambient temperature respectively, showing that the prepared materials are more efficient than most of the other adsorbents.Moreover, experimental data modeling showed that the adsorption process followed the Redlich-Peterson model. Regarding kinetics modeling, pseudo-first-order (PFO), pseudosecond-order and Pseudo-nth order models were used to correlate experimental data, demonstrating that a mass transfer equation (PFO) could describe MB adsorption. Thermodynamic Parameters were also evaluated, demonstrating that the MB adsorption process was achievable, spontaneous and exothermic. The regeneration study showed that both of the beads had excellent adsorption efficiency even at the sixth cycle for the two beads, 92.01 and 82.88 for BZJS1 and BZJS2, respectively. From this and in view of a future implementation at industrial scale, encapsulation by sodium alginate polymer can be therefore promisingly proposed as a solution to avoid the problems of conventional materials in powder form, such as the difficulty of regeneration, performances and mass loss during the recovery step of the powder from the medium.

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“…2. Maaloul et al (2019) synthetized novel environmentally friendly cellulose beads from almond shells (CBBAS).…”

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confidence: 99%

Pollutant removal and the health effects of environmental pollution

Kallel

Ksibi

Dhia

et al. 2020

Environ Sci Pollut Res

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Synthesis and characterization of eco-friendly cellulose beads for copper (II) removal from aqueous solutions

Cited by 35 publications

References 80 publications

Lignocellulose Nanofiber Media for the Enhanced Removal of Copper From Aqueous Solutions

Lignocellulose Nanofiber Media for the Enhanced Removal of Copper From Aqueous Solutions

The use of encapsulation as a proposed solution to avoid problems encountered with conventional materials in powder form: Application in methylene blue removal from aqueous solutions

Pollutant removal and the health effects of environmental pollution

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