Influence of terephthalate anion in ZnAl layered double hydroxide on lead ion removal: Adsorption, kinetics, thermodynamics and mechanism

de Aquino, Ramon Vinícius Santos; de Lucena, Pedro Gabriel Correia; Arias, Santiago; Landers, Richard; Pacheco, José Geraldo A.; Sá da Rocha, Otidene Rossiter

doi:10.1016/j.colsurfa.2024.133404

Cited by 6 publications

(2 citation statements)

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“…5d o ) values reveal that the adsorption process is spontaneous. The calculated values of ΔG o are significantly negative from 20 to 47°C, implying that increasing temperature is favorable for lead ion adsorption as a result of a stronger driving force of adsorption [55]. Changes in ΔG o values from −80 to −400 and 0 to −20 kJ/mol indicate chemical and physical adsorption processes, respectively.…”

Section: Thermodynamic Parametersmentioning

confidence: 91%

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Enhanced adsorption of lead (II) ions onto cellulose nanoparticles/chitosan composite based on loofah sponge: kinetic and thermodynamic studies

Matter,

Hassan,

Elfaramawy

et al. 2024

Biomass Conv. Bioref.

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The purpose of this work is to study the efficiency of lead ions removal via adsorption onto created solid nanomaterials. Three solid adsorbents were synthesized as cellulose nanoparticles (CN) extracted from plant loofah sponge using alkali treatment and acid hydrolysis techniques, chitosan beads (CZ), and cellulose nanoparticles/chitosan beads composite (CZC). The generated solid adsorbents were investigated using TGA, N2 adsorption/desorption, ATR-FTIR spectroscopy, SEM, TEM, XRD, and pHPZC. Based on our findings, CZC had a pHPZC of 7.2, a larger specific surface area (645.3 m2/g), and a total pore volume (0.372 cm3/g). The batch adsorption of lead ions was well-fitted by pseudo-second order, Elovich, Langmuir, Temkin, and Dubinin-Radushkevich on all the samples. Cellulose nanoparticles/chitosan composite had the highest Langmuir adsorption capacity (221.104 mg/g) at 47°C, 120 min as shaking time, 2 g/L as adsorbent dose, and pH 6.5. Nitric acid had the highest desorption percentage (92%). The thermodynamic investigation revealed that lead ion adsorption is endothermic, favorable, spontaneous, and physisorption. Our findings showed that CZC has a high adsorption capacity and rapid kinetics, indicating its potential for employment in water treatment.

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Section: Thermodynamic Parametersmentioning

confidence: 91%

“…Table 4 shows that CZC has the maximum adsorption capacity compared to other adsorbents [13,18,29,49,55,56]. CZC composite is an efficient adsorbent to eliminate Pb (II) ions from wastewater through batch adsorption.…”

Section: Comparison Between Czc Efficiency With Other Adsorbentsmentioning

confidence: 99%