Equilibrium and Kinetics Studies of adsorption of Copper (II) Ions on Natural Biosorbent

Farouq, Rania; Yousef, N.S.

doi:10.7763/ijcea.2015.v6.503

Cited by 56 publications

(47 citation statements)

References 16 publications

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“…To take into account the effect of a water environment on our target systems, polarizable continuum medium (PCM method) with an appropriate dielectric constant for the solvent (water) was used [29]. To model the adsorbent, molecular cluster models for hydrotalcite lamellae whose chemical structure is described by Mg 12 Al 7 (OH) 36 9+ were used [27,30]. The interlayer distance was kept 9.3 Å to imitate the experimentally observed one [31].…”

Section: Quantum Chemistry Calculationmentioning

confidence: 99%

Adsorption and Desorption Mechanisms of Rare Earth Elements (REEs) by Layered Double Hydroxide (LDH) Modified with Chelating Agents

et al. 2019

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In order to obtain the adsorption mechanism and adsorption structures of Rare Earth Elements (REEs) ions adsorbed onto layered double hydroxides (LDH), the adsorption performance of LDH and ethylenediaminetetraacetic acid (EDTA) intercalated LDH for REEs was investigated by batch experiments and regeneration studies. In addition to adsorption capacity, the partition coefficient (PC) was also evaluated to assess their true performance metrics. The adsorption capacity of LDH increases from 24.9 μg·g−1 to 145 μg·g−1 for Eu, and from 20.8 μg·g−1 to 124 μg·g−1 for La by intercalating EDTA in this work; and PC increases from 45.5 μg·g−1·uM−1 to 834 μg·g−1·uM−1 for Eu, and from 33.6 μg·g−1·μM−1 to 405 μg·g−1·μM−1 for La. Comparison of the data indicates that the adsorption affinity of EDTA-intercalated LDH is better than that of precursor LDH no matter whether the concept of adsorption capacity or that of the PC was used. The prepared adsorbent was characterized by XRD, SEM-EDS and FT-IR techniques. Moreover, quantum chemistry calculations were also performed using the GAUSSIAN09 program package. In this calculation, the molecular locally stable state structures were optimized by density functional theory (DFT). Both the quantum chemistry calculations and the experimental data showed that REEs ions adsorbed by EDTA-intercalated LDH are more stable than those adsorbed by precursor LDH. Furthermore, the calculation results of adsorption and desorption rates show that adsorption rates are larger for Eu(III) than for La(III), which agrees with the experimental result that Eu(III) has a higher adsorption ability under the same conditions. The LDHs synthesized in this work have a high affinity for removing REEs ions.

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Section: Quantum Chemistry Calculationmentioning

confidence: 99%

Adsorption and Desorption Mechanisms of Rare Earth Elements (REEs) by Layered Double Hydroxide (LDH) Modified with Chelating Agents

et al. 2019

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“…Where Co is the initial concentration of zinc (II) ion and the values of b was found to be between 0 and I indicating the favorability of the adsorption process (23). Freundlich Isotherm Freundlich sorption isotherm model considers the adsorption to occur in a heterogeneous surface where there is no limited degree of adsorption with sites and energies exponentially distributed (22,23). As expressed in Equation 6, n is the adsorption intensity and Kf the adsorption capacity obtained as the intercept and slope respectively and shown as the linear plot of In qe against In Ce illustrated in Equation 7.…”

Section: Effect Of Initial Metal Ion Concentrationmentioning

confidence: 99%

Activated Plantain Peel Biochar As Adsorbent For Removal of Zinc(II) Ions From Aqueous Solution: Equilibrium and Kinetics Studies.

Felix¹,

Ienna²,

Ikelle³

et al. 2018

Journal of the Turkish Chemical Society Section A: Chemistry

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Plantain peel biomass was carbonized, activated, and characterized using BET surface area and XRD. The XRD diffraction indicated crystalline structure with crystallite size of 14.56 nm evaluated through Debye-Scherrer equation. The pore size (cc/g) and pore surface area (m 2 /g) of the biochar was 8.79 and 16.69 respectively from BET surface area. Various parametric properties such as effect of initial metal ion concentration, pH, and contact time were studied in a batch reaction process. Adsorption of zinc from aqueous solution decreased with an increase of pH and initial concentration. Equilibrium modeling studies suggested that the data fitted mainly to the Langmuir isotherm. Adsorption kinetic data tested using various kinetic models fitted the Bangham's pore diffusion model implicating pore diffusion as the main rate limiting step. The sorption studies indicated the potential of plantain peel biochar as an effective, efficient and low cost adsorbent for remediating zinc (II) ions contaminated environment.

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“…The quality of aquatic system including flora and fauna, soil and soil micro-organisms, air and aesthetics are affected adversely presenting itself as a serious environmental concern [1][2][3][4] . Recently, the development and use of various adsorption materials, techniques and technologies for the removal of contaminants from aqueous media have increased [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15] . Many researchers [15][16][17][18][19][20][21][22][23][24][25][26][27] have used many agricultural based waste materials such as Retama Raetam plant, saw dust, wheat bran, Jatropha Curcas and Terminalia Catappa and unmodified saw dust as an alternative cheaper and affordable substitute for application as sorbent for adsorption of contaminants from aqueous media.…”

Section: Introductionmentioning

confidence: 99%

Removal of Methylene Blue From Aqueous Solution Using Activated Rice Husk Biochar: Adsorption Isotherms, Kinetics and Error Analysis

Nworie

Nwabue

Oti³

et al. 2019

J. Chil. Chem. Soc.

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Removal efficiency of methylene blue (MEB) from aqueous media was studied under different experimental conditions of pH, contact time and initial concentration of the adsorbate. Activated rice husk biochar (ARHB) was characterized using BET surface area and XRD. The XRD diffraction indicated amorphous nature of the biochar with pore size (cc/g) and pore surface area (m2/g) of 9.369 and 27.32 respectively from BET surface area plot. Equilibrium isotherm based on coefficient of non-determination indicated the following order as best fit model: Hill ˃ Kiselev ˃Elovic ˃Flory-Huggins > Langmuir > Jovanovic > Harkin-Jura >Freundlich > Henry > Temkin >Redlich Peterson>Durbinin-Kaganer Redushkevich >Hill-de Boer > Fowler-Guggenheim. Based on the highest correlation coefficient and the lowest values of the error functions applied to the kinetic models, Weber and Morris intra-particle diffusion and liquid film diffusion were noted to be in control of the sorption rate. The MEB sorption capacity of the activated biochar was 356.99 mmolkg-1 which was in the range of commercially available activated carbons and other biosorbents.

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Equilibrium and Kinetics Studies of adsorption of Copper (II) Ions on Natural Biosorbent

Cited by 56 publications

References 16 publications

Adsorption and Desorption Mechanisms of Rare Earth Elements (REEs) by Layered Double Hydroxide (LDH) Modified with Chelating Agents

Adsorption and Desorption Mechanisms of Rare Earth Elements (REEs) by Layered Double Hydroxide (LDH) Modified with Chelating Agents

Activated Plantain Peel Biochar As Adsorbent For Removal of Zinc(II) Ions From Aqueous Solution: Equilibrium and Kinetics Studies.

Removal of Methylene Blue From Aqueous Solution Using Activated Rice Husk Biochar: Adsorption Isotherms, Kinetics and Error Analysis

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