Ammonia removal from aqueous solution using organic acid modified activated carbon

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Abstract

The study was conducted to identify the potential used of organic acid modified activated carbon (AC-RCOONa) to remove ammonia from an aqueous solution using a batch and fixed-bed column adsorption. The optimum conditions for adsorption in the batch study occurred at pH range of 8 to 9 and contact time of 30 min. The Langmuir isotherms corresponded slightly better than Freundlich isotherm for both organic acid modified activated carbon (AC-RCOONa) and pristine activated carbon (AC). The Langmuir adsorption capacities for ammonia on AC-RCOONa and pristine AC were 19.34 mg/g and 4.50 mg/g respectively. The overall rate of the ammonia adsorption processes onto AC-RCOONa appears to be dominated by chemisorptions process. Fixed bed column adsorption indicated the higher performance of AC-RCOONa for ammonia removal compare to pristine AC in terms of chemical adsorption (for the first 40 minutes) and biological treatment (after 100 minutes). Ammonia removal performance of regenerated AC-RCOONa was comparable with fresh AC-COONa and better than pristine AC for the first 40 minutes of breakthrough time.

Original languageEnglish
Pages (from-to)1-6
Number of pages6
JournalWorld Applied Sciences Journal
Volume24
Issue number1
DOIs
Publication statusPublished - 2013

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organic acid
activated carbon
aqueous solution
ammonia
adsorption
removal
isotherm

Keywords

  • Adsorption
  • Ammonia removal
  • Modified activated carbon

ASJC Scopus subject areas

  • General

Cite this

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title = "Ammonia removal from aqueous solution using organic acid modified activated carbon",
abstract = "The study was conducted to identify the potential used of organic acid modified activated carbon (AC-RCOONa) to remove ammonia from an aqueous solution using a batch and fixed-bed column adsorption. The optimum conditions for adsorption in the batch study occurred at pH range of 8 to 9 and contact time of 30 min. The Langmuir isotherms corresponded slightly better than Freundlich isotherm for both organic acid modified activated carbon (AC-RCOONa) and pristine activated carbon (AC). The Langmuir adsorption capacities for ammonia on AC-RCOONa and pristine AC were 19.34 mg/g and 4.50 mg/g respectively. The overall rate of the ammonia adsorption processes onto AC-RCOONa appears to be dominated by chemisorptions process. Fixed bed column adsorption indicated the higher performance of AC-RCOONa for ammonia removal compare to pristine AC in terms of chemical adsorption (for the first 40 minutes) and biological treatment (after 100 minutes). Ammonia removal performance of regenerated AC-RCOONa was comparable with fresh AC-COONa and better than pristine AC for the first 40 minutes of breakthrough time.",
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author = "{Abdul Halim}, Azhar and Latif, {Mohd Talib} and Anuar Ithnin",
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T1 - Ammonia removal from aqueous solution using organic acid modified activated carbon

AU - Abdul Halim, Azhar

AU - Latif, Mohd Talib

AU - Ithnin, Anuar

PY - 2013

Y1 - 2013

N2 - The study was conducted to identify the potential used of organic acid modified activated carbon (AC-RCOONa) to remove ammonia from an aqueous solution using a batch and fixed-bed column adsorption. The optimum conditions for adsorption in the batch study occurred at pH range of 8 to 9 and contact time of 30 min. The Langmuir isotherms corresponded slightly better than Freundlich isotherm for both organic acid modified activated carbon (AC-RCOONa) and pristine activated carbon (AC). The Langmuir adsorption capacities for ammonia on AC-RCOONa and pristine AC were 19.34 mg/g and 4.50 mg/g respectively. The overall rate of the ammonia adsorption processes onto AC-RCOONa appears to be dominated by chemisorptions process. Fixed bed column adsorption indicated the higher performance of AC-RCOONa for ammonia removal compare to pristine AC in terms of chemical adsorption (for the first 40 minutes) and biological treatment (after 100 minutes). Ammonia removal performance of regenerated AC-RCOONa was comparable with fresh AC-COONa and better than pristine AC for the first 40 minutes of breakthrough time.

AB - The study was conducted to identify the potential used of organic acid modified activated carbon (AC-RCOONa) to remove ammonia from an aqueous solution using a batch and fixed-bed column adsorption. The optimum conditions for adsorption in the batch study occurred at pH range of 8 to 9 and contact time of 30 min. The Langmuir isotherms corresponded slightly better than Freundlich isotherm for both organic acid modified activated carbon (AC-RCOONa) and pristine activated carbon (AC). The Langmuir adsorption capacities for ammonia on AC-RCOONa and pristine AC were 19.34 mg/g and 4.50 mg/g respectively. The overall rate of the ammonia adsorption processes onto AC-RCOONa appears to be dominated by chemisorptions process. Fixed bed column adsorption indicated the higher performance of AC-RCOONa for ammonia removal compare to pristine AC in terms of chemical adsorption (for the first 40 minutes) and biological treatment (after 100 minutes). Ammonia removal performance of regenerated AC-RCOONa was comparable with fresh AC-COONa and better than pristine AC for the first 40 minutes of breakthrough time.

KW - Adsorption

KW - Ammonia removal

KW - Modified activated carbon

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