Sequestration of Pb(II) from aqueous environment by palm kernel shell activated carbon: isotherm and kinetic analyses

Abdul Halim Abdullah, . and Isokise Ekemini Monday, . and Tan Yen Ping, . Sequestration of Pb(II) from aqueous environment by palm kernel shell activated carbon: isotherm and kinetic analyses. pp. 1517-1534. ISSN 2231-8526

In this work activated carbons were produced by the thermochemical treatment of palm kernel shells with different activation time. The developed products (activated carbon samples) were described by their surface area porosity and applied for lead(II) ions separation from liquid phase. By prolonging the activation time beyond 2h some of the micropores collapsed to form mesopores without causing a significant transformation in the surface area. The influences of solution pH mass of biosorbents concentration of Pb(II) ions and temperature on the entrapment of lead(II) ions explored. Based on experimental outcome the best-suited condition for the Pb(II) uptake was 0.13 g AC-4 250 mg L-1 concentration and pH 4. The Pb(II) entrapment process is thermodynamically exothermic and spontaneous. The adsorption data fit the Langmuir monolayer adsorption model with 222 mg g-1 as maximum sorption capacity and the Ho-second-order kinetics model suitably described the process rate.

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Abstract

In this work activated carbons were produced by the thermochemical treatment of palm kernel shells with different activation time. The developed products (activated carbon samples) were described by their surface area porosity and applied for lead(II) ions separation from liquid phase. By prolonging the activation time beyond 2h some of the micropores collapsed to form mesopores without causing a significant transformation in the surface area. The influences of solution pH mass of biosorbents concentration of Pb(II) ions and temperature on the entrapment of lead(II) ions explored. Based on experimental outcome the best-suited condition for the Pb(II) uptake was 0.13 g AC-4 250 mg L-1 concentration and pH 4. The Pb(II) entrapment process is thermodynamically exothermic and spontaneous. The adsorption data fit the Langmuir monolayer adsorption model with 222 mg g-1 as maximum sorption capacity and the Ho-second-order kinetics model suitably described the process rate.

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Item Type:	Article
AGROVOC Term:	Activated carbon
AGROVOC Term:	Adsorption
AGROVOC Term:	Chemical analysis (methods)
AGROVOC Term:	Thermal analysis
AGROVOC Term:	Palm kernels
AGROVOC Term:	Heavy metals
AGROVOC Term:	Lead
AGROVOC Term:	Wastewater treatment
Depositing User:	Mr. AFANDI ABDUL MALEK
Last Modified:	24 Apr 2025 00:55
URI:	http://webagris.upm.edu.my/id/eprint/10017

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