Granular activated carbon (GAC) adsorption of two algal odorants, dimethyl trisulfide and β-cyclocitral

Ke jia Zhang, Nai yun Gao, Yang Deng, Ming hao Shui, Yu lin Tang

Research output: Contribution to journalArticle

29 Citations (Scopus)

Abstract

This study was to investigate granular activated carbon (GAC) adsorption of two algal odorants in water, dimethyl trisulfide and β-cyclocitral. Among the four isotherm models (Langmuir, Freundlich, Temkin, and Dubinin-Radushkevich), Freundlich isotherm showed the best fitting with the equilibrium data in terms of the coefficient of determination (R2) and Chi-square (x2). Based on the parameters determined in the Freundlich isotherm equations for GAC adsorption of a single odorant, we successfully predicted the GAC adsorption behavior in a bisolute solution using the Ideal Solution Adsorption (IAS) model. In the kinetics study of the two odorants adsorption by GAC, pseudo first-order and pseudo second-order kinetic models both well fit the experimental data. The calculated Gibbs free-energy changes for GAC adsorption of dimethyl trisulfide and β-cyclocitral were -3.61 and -4.24kJ/mol at 298K, respectively. The pH effects on GAC adsorption of dimethyl trisulfide and β-cyclocitral were different. Alkaline condition (pH >10) favored GAC adsorption of dimethyl trisulfide, however, adsorption of the β-cyclocitral was not significantly influenced by pH (2-13). The presence of natural organic matter (NOM) hindered adsorption of dimethyl trisulfide and β-cyclocitral to different degrees. Low molecular weight NOM fractions (particularly <1000) showed the significant inhibiting effect in the GAC adsorption.

Original languageEnglish
Pages (from-to)231-237
Number of pages7
JournalDesalination
Volume266
Issue number1-3
DOIs
StatePublished - 31 Jan 2011

Fingerprint

Activated carbon
activated carbon
adsorption
Adsorption
Isotherms
isotherm
Biological materials
dimethyl trisulfide
pH effects
organic matter
kinetics
Kinetics
Gibbs free energy
Molecular weight
Water

Keywords

  • Adsorption isotherms
  • Dimethyl trisulfide
  • Granular activated carbon (GAC)
  • Natural organic matter (NOM)
  • β-Cyclocitral

Cite this

Zhang, Ke jia ; Gao, Nai yun ; Deng, Yang ; Shui, Ming hao ; Tang, Yu lin. / Granular activated carbon (GAC) adsorption of two algal odorants, dimethyl trisulfide and β-cyclocitral. In: Desalination. 2011 ; Vol. 266, No. 1-3. pp. 231-237.
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abstract = "This study was to investigate granular activated carbon (GAC) adsorption of two algal odorants in water, dimethyl trisulfide and β-cyclocitral. Among the four isotherm models (Langmuir, Freundlich, Temkin, and Dubinin-Radushkevich), Freundlich isotherm showed the best fitting with the equilibrium data in terms of the coefficient of determination (R2) and Chi-square (x2). Based on the parameters determined in the Freundlich isotherm equations for GAC adsorption of a single odorant, we successfully predicted the GAC adsorption behavior in a bisolute solution using the Ideal Solution Adsorption (IAS) model. In the kinetics study of the two odorants adsorption by GAC, pseudo first-order and pseudo second-order kinetic models both well fit the experimental data. The calculated Gibbs free-energy changes for GAC adsorption of dimethyl trisulfide and β-cyclocitral were -3.61 and -4.24kJ/mol at 298K, respectively. The pH effects on GAC adsorption of dimethyl trisulfide and β-cyclocitral were different. Alkaline condition (pH >10) favored GAC adsorption of dimethyl trisulfide, however, adsorption of the β-cyclocitral was not significantly influenced by pH (2-13). The presence of natural organic matter (NOM) hindered adsorption of dimethyl trisulfide and β-cyclocitral to different degrees. Low molecular weight NOM fractions (particularly <1000) showed the significant inhibiting effect in the GAC adsorption.",
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Granular activated carbon (GAC) adsorption of two algal odorants, dimethyl trisulfide and β-cyclocitral. / Zhang, Ke jia; Gao, Nai yun; Deng, Yang; Shui, Ming hao; Tang, Yu lin.

In: Desalination, Vol. 266, No. 1-3, 31.01.2011, p. 231-237.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Granular activated carbon (GAC) adsorption of two algal odorants, dimethyl trisulfide and β-cyclocitral

AU - Zhang, Ke jia

AU - Gao, Nai yun

AU - Deng, Yang

AU - Shui, Ming hao

AU - Tang, Yu lin

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N2 - This study was to investigate granular activated carbon (GAC) adsorption of two algal odorants in water, dimethyl trisulfide and β-cyclocitral. Among the four isotherm models (Langmuir, Freundlich, Temkin, and Dubinin-Radushkevich), Freundlich isotherm showed the best fitting with the equilibrium data in terms of the coefficient of determination (R2) and Chi-square (x2). Based on the parameters determined in the Freundlich isotherm equations for GAC adsorption of a single odorant, we successfully predicted the GAC adsorption behavior in a bisolute solution using the Ideal Solution Adsorption (IAS) model. In the kinetics study of the two odorants adsorption by GAC, pseudo first-order and pseudo second-order kinetic models both well fit the experimental data. The calculated Gibbs free-energy changes for GAC adsorption of dimethyl trisulfide and β-cyclocitral were -3.61 and -4.24kJ/mol at 298K, respectively. The pH effects on GAC adsorption of dimethyl trisulfide and β-cyclocitral were different. Alkaline condition (pH >10) favored GAC adsorption of dimethyl trisulfide, however, adsorption of the β-cyclocitral was not significantly influenced by pH (2-13). The presence of natural organic matter (NOM) hindered adsorption of dimethyl trisulfide and β-cyclocitral to different degrees. Low molecular weight NOM fractions (particularly <1000) showed the significant inhibiting effect in the GAC adsorption.

AB - This study was to investigate granular activated carbon (GAC) adsorption of two algal odorants in water, dimethyl trisulfide and β-cyclocitral. Among the four isotherm models (Langmuir, Freundlich, Temkin, and Dubinin-Radushkevich), Freundlich isotherm showed the best fitting with the equilibrium data in terms of the coefficient of determination (R2) and Chi-square (x2). Based on the parameters determined in the Freundlich isotherm equations for GAC adsorption of a single odorant, we successfully predicted the GAC adsorption behavior in a bisolute solution using the Ideal Solution Adsorption (IAS) model. In the kinetics study of the two odorants adsorption by GAC, pseudo first-order and pseudo second-order kinetic models both well fit the experimental data. The calculated Gibbs free-energy changes for GAC adsorption of dimethyl trisulfide and β-cyclocitral were -3.61 and -4.24kJ/mol at 298K, respectively. The pH effects on GAC adsorption of dimethyl trisulfide and β-cyclocitral were different. Alkaline condition (pH >10) favored GAC adsorption of dimethyl trisulfide, however, adsorption of the β-cyclocitral was not significantly influenced by pH (2-13). The presence of natural organic matter (NOM) hindered adsorption of dimethyl trisulfide and β-cyclocitral to different degrees. Low molecular weight NOM fractions (particularly <1000) showed the significant inhibiting effect in the GAC adsorption.

KW - Adsorption isotherms

KW - Dimethyl trisulfide

KW - Granular activated carbon (GAC)

KW - Natural organic matter (NOM)

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DO - 10.1016/j.desal.2010.08.031

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