Equilibrium, thermodynamic and kinetic studies for the biosorption of aqueous lead(II) ions onto the seed husk of Calophyllum inophyllum

Lawal, Olayide S.; Sanni, A.R.; Ajayi, IkeOluwapo; Rabiu, O. O.

doi:10.1016/j.jhazmat.2009.12.108

Cited by 124 publications

(44 citation statements)

References 48 publications

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“…A dynamic system existed between the Ni(II) ions and the biomaterials; the concentration of Ni(II) ions adsorbed by each biomaterial reduced after reaching the maxima and equilibrium was only established after 60 min of contact. Similar results have been reported using other biosorbents for the uptake of different heavy metals (Prasanna et al, 2006;Bueno et al, 2008;Lawal et al, 2010). Metal uptake by biomaterial has been regarded to occur in phases, usually beginning with an initially fast adsorption phase where the adsorbate reaches a maximum within 5 to 15 min after solid liquid contact (Volesky and Holan, 1995).…”

Section: Batch Experimentssupporting

confidence: 80%

“…Values of q m were calculated from the linear plot of 1/q e against 1/C e (Lawal et al, 2010). The Freundlich (1907) isotherm is the most frequently used to describe the adsorption of inorganic and organic compounds in solution.…”

Section: Adsorption Isothermsmentioning

confidence: 99%

“…where R is the universal gas constant (8.314 J/mol/K), T is the temperature (K) and K is the distribution coefficient (Lawal et al, 2010). The plot of Ln K versus 1/T for EGP is as shown in Figure 13.…”

Section: Thermodynamic Studiesmentioning

confidence: 99%

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Screening of agricultural waste for Ni(II) adsorption: Kinetics, equilibrium and thermodynamic studies

Kakalanga¹

2012

Int. J. Phys. Sci.

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This study reports the adsorption of Ni(II) ions onto waste powders prepared from egg plant (EGP), sweet potato (SWP) and banana peels (BNP). The influence of adsorption parameters, such as pH, contact time, adsorbent weight, adsorbate concentration and temperature were investigated. Equilibrium was described by the Langmuir and Freundlich models. Ni(II) uptake was very fast reaching a maximum within 20 min of adsorbent contact with metal solution. Comparison of removal capacities for EGP, SWP and BNP indicated that EGP was more effective in removing Ni(II) from aqueous solution. The kinetic data fitted the pseudo second order model. Thermodynamic parameters ΔH and ΔS were negative which suggest that adsorption process was spontaneous. The results of Fourier transform infrared (FTIR) indicated several binding and chelating ions, such as carboxyl, carbonyl and hydroxyl groups on the biomaterials surfaces were responsible for Ni(II) adsorption.

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Section: Batch Experimentssupporting

confidence: 80%

Section: Adsorption Isothermsmentioning

confidence: 99%

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Screening of agricultural waste for Ni(II) adsorption: Kinetics, equilibrium and thermodynamic studies

Kakalanga¹

2012

Int. J. Phys. Sci.

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“…All adsorbents showed lower removal of lead ions from aqueous solutions than Acacia tortilis leaves [24], [25]. …”

Section: G Comparison Of Adsorption Capacity Of Acacia Tortilis Leavmentioning

confidence: 90%

Adsorption Removal of Lead Ions by Acacia Tortilis Leaves: Equilibrium, Kinetics and Thermodynamics

Ackacha¹,

Elsharif²

2012

IJESD

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Abstract-In this research, the Acacia tortilis leaves was utilized as an adsorbent material for the removal of lead ions from aqueous solution. Batch experiments were used to predict the adsorption capacity of lead ions onto Acacia tortilis leaves. Different parameters affecting the adsorption process were tested including initial pH of adsorbate, adsorbent dose, contact time and contact temperature. Three kinetic models, including first order, pseudo-second order and intra-particle diffusion were used to analyze the adsorption process. The adsorption process was investigated using Langmuir and Freundlich isotherm models. The maxima adsorption capacities were 704.8, 632.3, 437 and 332 at 303, 313, 323 and 323 K, respectively. Thermodynamic parameters such as gibbs free energy, enthalpy and entropy were calculated to predict the nature of the adsorption. Langmuir and Freundlich models were applied to describe the adsorption isotherm.Index Terms-Lead ions, adsorption, acacia tortilis, langmuir isotherm, thermodynamic parameters.

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“…Metal ions need to migrate to the biomass surface by intra-particle diffusion and greatly hydrolyzed ions diffused at a slower rate [20], these accounts for the reduction in the percentage adsorption. It can also be seen that an increase in the amount of the mangroves biomass led to an increase in the % adsorption.…”

Section: Figure 3: Effect Of Initial Concentration Of Pb (Ii) Ions Onmentioning

confidence: 99%

Efficacy of Mangrove (Rhizophora Mucronata) Roots Powder in Adsorption of Lead (II) Ions from Aqueous Solutions: Equilibrium and Kinetics Studies

Ngugi¹,

Onyari²,

Wabomba³

2016

IOSR

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Equilibrium, thermodynamic and kinetic studies for the biosorption of aqueous lead(II) ions onto the seed husk of Calophyllum inophyllum

Cited by 124 publications

References 48 publications

Screening of agricultural waste for Ni(II) adsorption: Kinetics, equilibrium and thermodynamic studies

Screening of agricultural waste for Ni(II) adsorption: Kinetics, equilibrium and thermodynamic studies

Adsorption Removal of Lead Ions by Acacia Tortilis Leaves: Equilibrium, Kinetics and Thermodynamics

Efficacy of Mangrove (Rhizophora Mucronata) Roots Powder in Adsorption of Lead (II) Ions from Aqueous Solutions: Equilibrium and Kinetics Studies

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