Cationic and anionic modifications of oil palm empty fruit bunch fibers for the removal of dyes from aqueous solutions

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Abstract

Oil palm empty fruit bunch (EFB) fibers were employed to remove dyes from aqueous solutions via adsorption approaches. The EFB fibers were modified using citric acid (CA) and polyethylenimine (PEI) to produce anionic and cationic adsorbents, respectively. The CA modified EFB fibers (CA-EFB) and PEI-modified EFB fibers (PEI-EFB) were used to study the efficiency in removing cationic methylene blue (MB) and anionic phenol red (PR) from aqueous solutions, respectively, at different pHs, temperatures and initial dye concentrations. The adsorption data for MB on the CA-EFB fitted the Langmuir isotherm, while the adsorption of PR on the PEI-EFB fitted the Freundlich isotherm, suggesting a monolayer and heterogeneous adsorption behavior of the adsorption processes, respectively. Both modified fibers can be regenerated up to seven adsorption/desorption cycles while still providing as least 70% of the initial adsorption capacity.

Original languageEnglish
Pages (from-to)571-577
Number of pages7
JournalBioresource Technology
Volume128
DOIs
Publication statusPublished - Jan 2013

Fingerprint

Palm oil
Fruits
dye
Coloring Agents
aqueous solution
Dyes
fruit
adsorption
Adsorption
Fibers
oil
Polyethyleneimine
citric acid
Citric acid
Citric Acid
Phenolsulfonphthalein
Methylene Blue
Phenols
Isotherms
phenol

Keywords

  • Adsorption
  • Isotherms
  • Methylene blue
  • Natural adsorbent
  • Phenol red

ASJC Scopus subject areas

  • Bioengineering
  • Environmental Engineering
  • Waste Management and Disposal

Cite this

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title = "Cationic and anionic modifications of oil palm empty fruit bunch fibers for the removal of dyes from aqueous solutions",
abstract = "Oil palm empty fruit bunch (EFB) fibers were employed to remove dyes from aqueous solutions via adsorption approaches. The EFB fibers were modified using citric acid (CA) and polyethylenimine (PEI) to produce anionic and cationic adsorbents, respectively. The CA modified EFB fibers (CA-EFB) and PEI-modified EFB fibers (PEI-EFB) were used to study the efficiency in removing cationic methylene blue (MB) and anionic phenol red (PR) from aqueous solutions, respectively, at different pHs, temperatures and initial dye concentrations. The adsorption data for MB on the CA-EFB fitted the Langmuir isotherm, while the adsorption of PR on the PEI-EFB fitted the Freundlich isotherm, suggesting a monolayer and heterogeneous adsorption behavior of the adsorption processes, respectively. Both modified fibers can be regenerated up to seven adsorption/desorption cycles while still providing as least 70{\%} of the initial adsorption capacity.",
keywords = "Adsorption, Isotherms, Methylene blue, Natural adsorbent, Phenol red",
author = "{Mohd Shaiful}, Sajab and Chia, {Chin Hua} and Sarani Zakaria and Khiew, {Poi Sim}",
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T1 - Cationic and anionic modifications of oil palm empty fruit bunch fibers for the removal of dyes from aqueous solutions

AU - Mohd Shaiful, Sajab

AU - Chia, Chin Hua

AU - Zakaria, Sarani

AU - Khiew, Poi Sim

PY - 2013/1

Y1 - 2013/1

N2 - Oil palm empty fruit bunch (EFB) fibers were employed to remove dyes from aqueous solutions via adsorption approaches. The EFB fibers were modified using citric acid (CA) and polyethylenimine (PEI) to produce anionic and cationic adsorbents, respectively. The CA modified EFB fibers (CA-EFB) and PEI-modified EFB fibers (PEI-EFB) were used to study the efficiency in removing cationic methylene blue (MB) and anionic phenol red (PR) from aqueous solutions, respectively, at different pHs, temperatures and initial dye concentrations. The adsorption data for MB on the CA-EFB fitted the Langmuir isotherm, while the adsorption of PR on the PEI-EFB fitted the Freundlich isotherm, suggesting a monolayer and heterogeneous adsorption behavior of the adsorption processes, respectively. Both modified fibers can be regenerated up to seven adsorption/desorption cycles while still providing as least 70% of the initial adsorption capacity.

AB - Oil palm empty fruit bunch (EFB) fibers were employed to remove dyes from aqueous solutions via adsorption approaches. The EFB fibers were modified using citric acid (CA) and polyethylenimine (PEI) to produce anionic and cationic adsorbents, respectively. The CA modified EFB fibers (CA-EFB) and PEI-modified EFB fibers (PEI-EFB) were used to study the efficiency in removing cationic methylene blue (MB) and anionic phenol red (PR) from aqueous solutions, respectively, at different pHs, temperatures and initial dye concentrations. The adsorption data for MB on the CA-EFB fitted the Langmuir isotherm, while the adsorption of PR on the PEI-EFB fitted the Freundlich isotherm, suggesting a monolayer and heterogeneous adsorption behavior of the adsorption processes, respectively. Both modified fibers can be regenerated up to seven adsorption/desorption cycles while still providing as least 70% of the initial adsorption capacity.

KW - Adsorption

KW - Isotherms

KW - Methylene blue

KW - Natural adsorbent

KW - Phenol red

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