Adsorption mechanism of Zn2+, Ni2+, Cd2+, and Cu2+ ions by carbon-based adsorbents: interpretation of the adsorption isotherms via physical modelling

Dhaouadi, Fatma; Sellaoui, Lotfi; Reynel-Ávila, Hilda Elizabeth; Landin-Sandoval, V.J.; Mendoza-Castillo, Didilia I.; Jaime-Leal, José Enrique; Lima, Éder C.; Bonilla-Petriciolet, Adrián; Lamine, Abdelmottaleb Ben

doi:10.1007/s11356-021-12832-x

Cited by 90 publications

(56 citation statements)

References 54 publications

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“…These values reflect the controlling effect for the physical mechanisms during the As (V) uptake reactions (hydrogen bonding and dipole bonding forces). The estimation of As (V) adsorption energies as negative values demonstrates the exothermic properties of the occurred retention reactions by BE, PN/BE, and G.Zn@PN/BE [52].…”

Section: Adsorption Energymentioning

confidence: 84%

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Synthesis and Characterization of Green ZnO@polynaniline/Bentonite Tripartite Structure (G.Zn@PN/BE) as Adsorbent for As (V) Ions: Integration, Steric, and Energetic Properties

et al. 2022

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A green ZnO@polynaniline/bentonite composite (G.Zn@PN/BE) was synthesized as an enhanced adsorbent for As (V) ions. Its adsorption properties were assessed in comparison with the integrated components of bentonite (BE) and polyaniline/bentonite (PN/BE) composites. The G.Zn@PN/BE composite achieved an As (V) retention capacity (213 mg/g) higher than BE (72.7 mg/g) and PN/BE (119.8 mg/g). The enhanced capacity of G.Zn@PN/BE was studied using classic (Langmuir) and advanced equilibrium (monolayer model of one energy) models. Considering the steric properties, the structure of G.Zn@PN/BE demonstrated a higher density of active sites (Nm = 109.8 (20 °C), 108.9 (30 °C), and 67.8 mg/g (40 °C)) than BE and PN/BE. This declared the effect of the integration process in inducing the retention capacity by increasing the quantities of the active sites. The number of adsorbed As (V) ions per site (1.76 up to 2.13) signifies the retention of two or three ions per site by a multi-ionic mechanism. The adsorption energies (from −3.07 to −3.26 kJ/mol) suggested physical retention mechanisms (hydrogen bonding and dipole bonding forces). The adsorption energy, internal energy, and free enthalpy reflected the exothermic, feasible, and spontaneous nature of the retention process. The structure is of significant As (V) uptake capacity in the existence of competitive anions or metal ions.

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Section: Adsorption Energymentioning

confidence: 84%

“…The internal energy of As (V) retention reactions by G.Zn@PN/BE and its components (BE and PN/BE) was calculated considering Equation ( 6), in which the Zv symbol refers to the translation partition value per unit volume [52].…”

Section: Internal Energy and Free Enthalpymentioning

confidence: 99%

Synthesis and Characterization of Green ZnO@polynaniline/Bentonite Tripartite Structure (G.Zn@PN/BE) as Adsorbent for As (V) Ions: Integration, Steric, and Energetic Properties

et al. 2022

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“…Since the processes were likely to follow the pseudo-second order equation, it suggested that the adsorption was possibly the result of chemical interactions between the metal ion molecules and the surface functional groups on UVS adsorbent [ 33 ]. The presence of some carbonate groups on the shell surface might have been involved in bonding with the Cu(II) and Zn(II) ion molecules [ 54 ]. The finding was in good agreement with the FTIR analysis result.…”

Section: Resultsmentioning

confidence: 99%

Adsorption kinetics and isotherms of binary metal ion aqueous solution using untreated venus shell

Khamwichit

Dechapanya

2022

Heliyon

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“…With the rapid development of industrial activities, numerous effluents containing heavy metals are released into surface and underground water, resulting in increased environmental risks. Copper is a heavily used metal in industries such as plating, mining and smelting, brass manufacture, electroplating industries, and petroleum refining, and excessively used in Cu-based agrichemicals mining [ 1 , 2 , 3 ]. These industries produce much wastewater and sludge containing Cu 2+ ions at various concentrations, which have negative effects on the water environment [ 4 , 5 ].…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Microporosity Dominant Wood-Based Activated Carbon Fiber for Removal of Copper Ions

Jin

Zeng

et al. 2022

Polymers

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Steam activation treatments were introduced in the preparation of activated carbon fiber from liquefied wood (LWACF), to enlarge its specific surface area and develop the pore size distribution. With increasing activation time, the average fiber diameter of LWACF decreased from 27.2 µm to 13.2 µm, while the specific surface area increased from 1025 to 2478 m2/g. Steam activation predominantly enhanced the development of microporosity, without significant pore widening. Prolonging the steam activation time exponentially increased the removal efficiency of Cu2+ at a constant adsorbent dose, as a result of an increase in the number of micropores and acidic-oxygenated groups. Moreover, for LWACF activated for 220 min at 800 °C, the removal efficiency of Cu2+ increased from 55.2% to 99.4%, when the porous carbon fiber dose went from 0.1 to 0.5 g/L. The synthesized LWACF was proven to be a highly efficient adsorbent for the treatment of Cu2+ ion-contaminated wastewater.

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Adsorption mechanism of Zn2+, Ni2+, Cd2+, and Cu2+ ions by carbon-based adsorbents: interpretation of the adsorption isotherms via physical modelling

Cited by 90 publications

References 54 publications

Synthesis and Characterization of Green ZnO@polynaniline/Bentonite Tripartite Structure (G.Zn@PN/BE) as Adsorbent for As (V) Ions: Integration, Steric, and Energetic Properties

Synthesis and Characterization of Green ZnO@polynaniline/Bentonite Tripartite Structure (G.Zn@PN/BE) as Adsorbent for As (V) Ions: Integration, Steric, and Energetic Properties

Adsorption kinetics and isotherms of binary metal ion aqueous solution using untreated venus shell

Synthesis of Microporosity Dominant Wood-Based Activated Carbon Fiber for Removal of Copper Ions

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