Adsorption study of aluminium onto Curcuma longa

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Abstract

Curcuma longa or turmeric was used as adsorbent for aluminium removal. The effects of operational factors, including pH, contact time and dose were studied, and their optimal controls were proven. Overall uptake of Curcuma longa was at the maximum when pH ranged between 5 and 9 and the optimal removal was 91.2%. Optimal removal of 95.8% was achieved at the 90th minute for the batch experiment. A dose of 6 g/L was enough for optimal removal of 93.6%. Aluminium adsorption onto Curcuma longa was found to have a good correlation with Freundlich adsorption model contrary to the Langmuir model. Simple kinetic model such as pseudo-first order, pseudo-second order, Elovich equation and intra-particulate mixing models were employed to determine the adsorption mechanism. The adsorption kinetic study showed that the pseudo-second order kinetic was the most applicable, and this result suggests that chemical adsorption process was more dominant.

Original languageEnglish
Pages (from-to)193-197
Number of pages5
JournalNature Environment and Pollution Technology
Volume11
Issue number2
Publication statusPublished - Mar 2012

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aluminum
adsorption
Aluminum
Adsorption
kinetics
Kinetics
Adsorbents
removal
experiment
Experiments
dose

Keywords

  • Adsorption
  • Aluminium
  • Curcuma longa
  • Turmeric

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Environmental Science(all)

Cite this

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title = "Adsorption study of aluminium onto Curcuma longa",
abstract = "Curcuma longa or turmeric was used as adsorbent for aluminium removal. The effects of operational factors, including pH, contact time and dose were studied, and their optimal controls were proven. Overall uptake of Curcuma longa was at the maximum when pH ranged between 5 and 9 and the optimal removal was 91.2{\%}. Optimal removal of 95.8{\%} was achieved at the 90th minute for the batch experiment. A dose of 6 g/L was enough for optimal removal of 93.6{\%}. Aluminium adsorption onto Curcuma longa was found to have a good correlation with Freundlich adsorption model contrary to the Langmuir model. Simple kinetic model such as pseudo-first order, pseudo-second order, Elovich equation and intra-particulate mixing models were employed to determine the adsorption mechanism. The adsorption kinetic study showed that the pseudo-second order kinetic was the most applicable, and this result suggests that chemical adsorption process was more dominant.",
keywords = "Adsorption, Aluminium, Curcuma longa, Turmeric",
author = "{Abdul Halim}, Azhar and Eliani Ezani and Othman, {Mohd. Sham} and Normah Awang and {A Wahab}, {Muhammad Ikram} and Anuar Ithnin",
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T1 - Adsorption study of aluminium onto Curcuma longa

AU - Abdul Halim, Azhar

AU - Ezani, Eliani

AU - Othman, Mohd. Sham

AU - Awang, Normah

AU - A Wahab, Muhammad Ikram

AU - Ithnin, Anuar

PY - 2012/3

Y1 - 2012/3

N2 - Curcuma longa or turmeric was used as adsorbent for aluminium removal. The effects of operational factors, including pH, contact time and dose were studied, and their optimal controls were proven. Overall uptake of Curcuma longa was at the maximum when pH ranged between 5 and 9 and the optimal removal was 91.2%. Optimal removal of 95.8% was achieved at the 90th minute for the batch experiment. A dose of 6 g/L was enough for optimal removal of 93.6%. Aluminium adsorption onto Curcuma longa was found to have a good correlation with Freundlich adsorption model contrary to the Langmuir model. Simple kinetic model such as pseudo-first order, pseudo-second order, Elovich equation and intra-particulate mixing models were employed to determine the adsorption mechanism. The adsorption kinetic study showed that the pseudo-second order kinetic was the most applicable, and this result suggests that chemical adsorption process was more dominant.

AB - Curcuma longa or turmeric was used as adsorbent for aluminium removal. The effects of operational factors, including pH, contact time and dose were studied, and their optimal controls were proven. Overall uptake of Curcuma longa was at the maximum when pH ranged between 5 and 9 and the optimal removal was 91.2%. Optimal removal of 95.8% was achieved at the 90th minute for the batch experiment. A dose of 6 g/L was enough for optimal removal of 93.6%. Aluminium adsorption onto Curcuma longa was found to have a good correlation with Freundlich adsorption model contrary to the Langmuir model. Simple kinetic model such as pseudo-first order, pseudo-second order, Elovich equation and intra-particulate mixing models were employed to determine the adsorption mechanism. The adsorption kinetic study showed that the pseudo-second order kinetic was the most applicable, and this result suggests that chemical adsorption process was more dominant.

KW - Adsorption

KW - Aluminium

KW - Curcuma longa

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