Carbon derived from jatropha seed hull as a potential green adsorbent for cadmium (II) removal from wastewater

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Abstract

Carbon from jatropha seed hull (JC) was prepared to study the adsorption of cadmium ions (Cd2+) from aqueous solutions under various experimental conditions. Batch equilibrium methods have been used to study the influences of the initial metal ion concentration (0.5-50 ppm), dosage (0.2-1 g), contact time (0-300 min), pH (2-7), and temperature (26-60 deg;C) on adsorption behavior. It has been found that the amount of cadmium adsorbed increases with the initial metal ion concentration, temperature, pH, contact time, and amount of adsorbent. A kinetic study proved that the mechanism of Cd2+ adsorption on JC followed a three steps process, confirmed by an intraparticle diffusion model: rapid adsorption of metal ions, a transition phase, and nearly flat plateau section. The experimental results also showed that the Cd2+ adsorption process followed pseudo-second-order kinetics. The Langmuir and Freundlich adsorption isotherm models were used to describe the experimental data, with the former exhibiting a better correlation coefficient than the latter (R2=0.999). The monolayer adsorption capacity of JC has been compared with the capacities of the other reported agriculturally-based adsorbents. It has been clearly demonstrated that this agricultural waste generated by the biofuel industry can be considered a potential low-cost adsorbent for the removal of Cd2+ from industrial effluents.

Original languageEnglish
Pages (from-to)4462-4478
Number of pages17
JournalMaterials
Volume6
Issue number10
DOIs
Publication statusPublished - 2013

Fingerprint

Cadmium
Adsorbents
Seed
Wastewater
Carbon
Adsorption
Metal ions
Agricultural wastes
Kinetics
Biofuels
Adsorption isotherms
Effluents
Monolayers
Ions
Temperature
Costs
Industry

Keywords

  • Adsorption activity
  • Cadmium
  • Carbon
  • Jatropha seed hull
  • Kinetic and isotherm model

ASJC Scopus subject areas

  • Materials Science(all)

Cite this

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title = "Carbon derived from jatropha seed hull as a potential green adsorbent for cadmium (II) removal from wastewater",
abstract = "Carbon from jatropha seed hull (JC) was prepared to study the adsorption of cadmium ions (Cd2+) from aqueous solutions under various experimental conditions. Batch equilibrium methods have been used to study the influences of the initial metal ion concentration (0.5-50 ppm), dosage (0.2-1 g), contact time (0-300 min), pH (2-7), and temperature (26-60 deg;C) on adsorption behavior. It has been found that the amount of cadmium adsorbed increases with the initial metal ion concentration, temperature, pH, contact time, and amount of adsorbent. A kinetic study proved that the mechanism of Cd2+ adsorption on JC followed a three steps process, confirmed by an intraparticle diffusion model: rapid adsorption of metal ions, a transition phase, and nearly flat plateau section. The experimental results also showed that the Cd2+ adsorption process followed pseudo-second-order kinetics. The Langmuir and Freundlich adsorption isotherm models were used to describe the experimental data, with the former exhibiting a better correlation coefficient than the latter (R2=0.999). The monolayer adsorption capacity of JC has been compared with the capacities of the other reported agriculturally-based adsorbents. It has been clearly demonstrated that this agricultural waste generated by the biofuel industry can be considered a potential low-cost adsorbent for the removal of Cd2+ from industrial effluents.",
keywords = "Adsorption activity, Cadmium, Carbon, Jatropha seed hull, Kinetic and isotherm model",
author = "Masita Mohammad and Zahira Yaakob and {Sheikh Abdullah}, {Siti Rozaimah}",
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T1 - Carbon derived from jatropha seed hull as a potential green adsorbent for cadmium (II) removal from wastewater

AU - Mohammad, Masita

AU - Yaakob, Zahira

AU - Sheikh Abdullah, Siti Rozaimah

PY - 2013

Y1 - 2013

N2 - Carbon from jatropha seed hull (JC) was prepared to study the adsorption of cadmium ions (Cd2+) from aqueous solutions under various experimental conditions. Batch equilibrium methods have been used to study the influences of the initial metal ion concentration (0.5-50 ppm), dosage (0.2-1 g), contact time (0-300 min), pH (2-7), and temperature (26-60 deg;C) on adsorption behavior. It has been found that the amount of cadmium adsorbed increases with the initial metal ion concentration, temperature, pH, contact time, and amount of adsorbent. A kinetic study proved that the mechanism of Cd2+ adsorption on JC followed a three steps process, confirmed by an intraparticle diffusion model: rapid adsorption of metal ions, a transition phase, and nearly flat plateau section. The experimental results also showed that the Cd2+ adsorption process followed pseudo-second-order kinetics. The Langmuir and Freundlich adsorption isotherm models were used to describe the experimental data, with the former exhibiting a better correlation coefficient than the latter (R2=0.999). The monolayer adsorption capacity of JC has been compared with the capacities of the other reported agriculturally-based adsorbents. It has been clearly demonstrated that this agricultural waste generated by the biofuel industry can be considered a potential low-cost adsorbent for the removal of Cd2+ from industrial effluents.

AB - Carbon from jatropha seed hull (JC) was prepared to study the adsorption of cadmium ions (Cd2+) from aqueous solutions under various experimental conditions. Batch equilibrium methods have been used to study the influences of the initial metal ion concentration (0.5-50 ppm), dosage (0.2-1 g), contact time (0-300 min), pH (2-7), and temperature (26-60 deg;C) on adsorption behavior. It has been found that the amount of cadmium adsorbed increases with the initial metal ion concentration, temperature, pH, contact time, and amount of adsorbent. A kinetic study proved that the mechanism of Cd2+ adsorption on JC followed a three steps process, confirmed by an intraparticle diffusion model: rapid adsorption of metal ions, a transition phase, and nearly flat plateau section. The experimental results also showed that the Cd2+ adsorption process followed pseudo-second-order kinetics. The Langmuir and Freundlich adsorption isotherm models were used to describe the experimental data, with the former exhibiting a better correlation coefficient than the latter (R2=0.999). The monolayer adsorption capacity of JC has been compared with the capacities of the other reported agriculturally-based adsorbents. It has been clearly demonstrated that this agricultural waste generated by the biofuel industry can be considered a potential low-cost adsorbent for the removal of Cd2+ from industrial effluents.

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KW - Kinetic and isotherm model

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