Adsorption of copper and nickel by using sawdust chitosan nanocomposite beads – A kinetic and thermodynamic study

Kayalvizhi, K.; Alhaji, N. M. I.; Saravanakkumar, D.; Mohamed, S. Beer; Kaviyarasu, K.; Ayeshamariam, A.; Al‐Mohaimeed, Amal M.; Gawwad, Mohamed Ragab Abdel; Elshikh, Mohamed S.

doi:10.1016/j.envres.2021.111814

Cited by 89 publications

(26 citation statements)

References 14 publications

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“… 43 The theoretical maximum adsorption capacity of CNOs calculated from Langmuir model is 100.00 mg g −1 which is comparable with those of g-C 3 N 4 /graphene oxide hydrogel and alginate hydrogels, and is obviously higher than those of sawdust-chitosan nanocomposite beads and chitosan/Al 2 O 3 /Fe 3 O 4 nanocomposite (see Table 2 ). 16,44–46 The adsorption effected by contact time is shown in Fig. 6c .…”

Section: Resultsmentioning

confidence: 98%

“…Among these technologies, adsorption is considered as an alternative and promising one in terms of its low cost, high efficiency and ready operation. 16 Carbon nanomaterials, such as CNOs, possess relatively high surface area, developed pore structure, abundant structure defects as well as surface functional groups, are widely accepted as a class of high-efficient adsorbents. 17,18 …”

Section: Introductionmentioning

confidence: 99%

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Facile and green preparation of solid carbon nanoonions via catalytic co-pyrolysis of lignin and polyethylene and their adsorption capability towards Cu(ii)

Guo

Chen

et al. 2022

RSC Adv.

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Section: Resultsmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

Facile and green preparation of solid carbon nanoonions via catalytic co-pyrolysis of lignin and polyethylene and their adsorption capability towards Cu(ii)

Guo

Chen

et al. 2022

RSC Adv.

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“…Increasing the temperature from 298 to 328 K promoted an increase in the BSG adsorption capacity. Kayalvizhi et al (2022) also reported that increased temperature facilitated Ni adsorption. The authors used an adsorbent based on biomaterial-activated sawdust-chitosan powder in this study.…”

Section: Equilibrium Isothermsmentioning

confidence: 93%

Polishing of painting process effluents through adsorption with biochar from winemaking residues

Carvalho

Pinto

Schio

et al. 2022

Environ Sci Pollut Res

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A real industrial effluent from the pre-treatment and painting processes was polished through adsorption using alternative biochar derived from grape pomace wastes. The biochar was produced in a pilot-scale plant from composted grape pomace. Biochar showed an equilibrium between acidic and basic groups on the surface. The presence of irregular cavities in the structure and mesopores was confirmed by analyzing N 2 physisorption and SEM. Concerning the effluent, Ni and Zn were the main problematic elements. The adsorption isotherms and kinetics of Ni and Zn from the effluent using the biochar could be represented by the Henry, pseudo-first-order, and pseudo-second-order models, respectively. Adsorption equilibrium was reached within 60 min for Ni and Zn present in the real effluent. Besides, the adsorption process was endothermic, favorable, and spontaneous. These results demonstrate that Zn and Ni metals were successfully removed from the industrial effluent, presenting final concentration values within the limit of legislation for effluent disposal in agricultural soil.

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“…We employed three adsorption kinetic models to fit the experimental data: (a) pseudo-first-order, (b) pseudo-second-order, and (c) intraparticle diffusion . The thermodynamic parameters of the adsorption process, Gibbs free energy (Δ G °), enthalpy (Δ H °), and entropy (Δ S °) were determined according to K = q normale C normale normalΔ G ° = prefix− italicRT 0.25em ln nobreak0em.25em⁡ K ln nobreak0em.25em⁡ K = normalΔ S ° T − normalΔ H ° italicRT where T is the absolute temperature (K), R is the universal gas constant (8.314 J/mol·K), and K is the thermodynamic equilibrium constant.…”

Section: Methodsmentioning

confidence: 99%

Prosopis juliflora Seed Waste as Biochar for the Removal of Blue Methylene: A Thermodynamic and Kinetic Study

et al. 2022

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In this work, we studied the methylene blue (MB) dye adsorption capacity on biochar derived from residues of Prosopis juliflora seed waste, a species found in the region of the tropical dry forest of Piojó in the Department of Atlántico, Colombia. The materials were obtained by pyrolysis at temperatures of 300, 500, and 700 °C. Biochar was characterized using Fourier transform infrared (FTIR), scanning electron microscopy and energy-dispersive X-ray spectroscopy (SEM-EDX), TGA, and Brunauer–Emmett–Teller (BET) techniques. The three biochar samples presented a macroporous, rough structure with pore size between 6 and 28 μm. The largest pore surface area observed was 1.28 m 2 /g for pyrolyzed biochar produced at 500 °C, larger than that of biochar produced at 700 °C, which was 0.83 m 2 /g. The adsorption results show that the maximum percentage of MB removal was 69%. According to SEM results, the material’s pore sizes varied on average from 6 to 28 μm. We modeled MB adsorption on biomass through three different isotherm models. The Freundlich model was the best-fitting model for the removal of MB ( K F = 1.447; 1/ n = 0.352). The kinetic results showed that the pseudo-second-order model was the best-fitting model for the sorption process ( q e = 2.94 mg/g; k 2 = 0.087 g/(mg/min –1 )). Furthermore, the recycling test showed that the biochar did not change its adsorption capacity significantly. Finally, under the experimental conditions, the thermodynamic parameters indicated that the removal of MB using biochar was an endothermic and spontaneous process; all Δ G ° values ranged from −2.14 to −0.95 kJ/mol; Δ H ° was 23.54 kJ/mol and Δ S ° was 79.5 J/mol.

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Adsorption of copper and nickel by using sawdust chitosan nanocomposite beads – A kinetic and thermodynamic study

Cited by 89 publications

References 14 publications

Facile and green preparation of solid carbon nanoonions via catalytic co-pyrolysis of lignin and polyethylene and their adsorption capability towards Cu(ii)

Facile and green preparation of solid carbon nanoonions via catalytic co-pyrolysis of lignin and polyethylene and their adsorption capability towards Cu(ii)

Polishing of painting process effluents through adsorption with biochar from winemaking residues

Prosopis juliflora Seed Waste as Biochar for the Removal of Blue Methylene: A Thermodynamic and Kinetic Study

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