Removal of the Herbicide MCPA by Commercial Activated Carbons: Equilibrium, Kinetics, and Reversibility

Olga Gimeno, Pawel Plucinski, Stan T Kolaczkowski, Francisco J Rivas, Pedro M Alvarez

Research output: Contribution to journalArticle

42 Citations (Scopus)

Abstract

Adsorption of the herbicide MCPA (4-chloro-2-methylphenoxyacetic acid) was studied using 4 com. activated carbons (Norit 0.8, Aquacarb 207C, Aquacarb 208A, Aquacarb 208EA). Adsorption equil. isotherms were obtained at 293-358 K. The trend of MCPA adsorption onto these activated carbons was: Norit 0.8 > Aquacarb 207C > Aquacarb 208A > Aquacarb 208EA. Among various adsorption isotherm models, the Freundlich equation best fit the exptl. data. Expts. conducted at different temps. allowed calcn. of the isosteric heat of adsorption and showed adsorption was exothermic for 3 of the 4 carbons studied. Herbicide distribution in the activated C pores of Norit 0.8 was studied by considering the Dubinin-Radushkevich isotherm. Adsorption kinetics were assessed using a simplistic mechanism based on the shrinking-core mass-transfer model. As a preliminary step for the potential use of wet air oxidn. (WAO) to regenerate exhausted activated C, adsorption process reversibility was tested. Only partial desorption of MCPA was achieved under WAO conditions, which involved a likely double route of activated C regeneration, i.e., liq. and surface pollutant oxidn. [on SciFinder (R)]
Original languageEnglish
Pages (from-to)1076-1086
Number of pages11
JournalIndustrial & Engineering Chemistry Research
Volume42
Issue number5
Publication statusPublished - 2003

Fingerprint

2-Methyl-4-chlorophenoxyacetic Acid
Herbicides
Activated carbon
Adsorption
Kinetics
Charcoal
Isotherms
Adsorption isotherms
Desorption
Carbon
Mass transfer
Acids

Keywords

  • Water purification (adsorption
  • Oxidation (wet air
  • activated carbon
  • loaded activated carbon regeneration
  • wet air oxidn regeneration loaded com activated carbon
  • water purifn wastewater treatment MCPA adsorption removal activated carbon
  • and reversibility of dissolved MCPA adsorptive removal from water and wastewater using com. activated carbon)
  • Wastewater treatment
  • Ashes
  • equil.
  • Reaction kinetics (non-equil. adsorption
  • Particle size (com. activated carbon
  • Adsorption enthalpy (isosteric
  • equil kinetics reversibility MCPA removal com activated carbon adsorption
  • kinetics
  • com. activated carbon

Cite this

Removal of the Herbicide MCPA by Commercial Activated Carbons: Equilibrium, Kinetics, and Reversibility. / Gimeno, Olga; Plucinski, Pawel; Kolaczkowski, Stan T; Rivas, Francisco J; Alvarez, Pedro M.

In: Industrial & Engineering Chemistry Research, Vol. 42, No. 5, 2003, p. 1076-1086.

Research output: Contribution to journalArticle

@article{e42425a4003849d2a94d2fb0857dde8a,
title = "Removal of the Herbicide MCPA by Commercial Activated Carbons: Equilibrium, Kinetics, and Reversibility",
abstract = "Adsorption of the herbicide MCPA (4-chloro-2-methylphenoxyacetic acid) was studied using 4 com. activated carbons (Norit 0.8, Aquacarb 207C, Aquacarb 208A, Aquacarb 208EA). Adsorption equil. isotherms were obtained at 293-358 K. The trend of MCPA adsorption onto these activated carbons was: Norit 0.8 > Aquacarb 207C > Aquacarb 208A > Aquacarb 208EA. Among various adsorption isotherm models, the Freundlich equation best fit the exptl. data. Expts. conducted at different temps. allowed calcn. of the isosteric heat of adsorption and showed adsorption was exothermic for 3 of the 4 carbons studied. Herbicide distribution in the activated C pores of Norit 0.8 was studied by considering the Dubinin-Radushkevich isotherm. Adsorption kinetics were assessed using a simplistic mechanism based on the shrinking-core mass-transfer model. As a preliminary step for the potential use of wet air oxidn. (WAO) to regenerate exhausted activated C, adsorption process reversibility was tested. Only partial desorption of MCPA was achieved under WAO conditions, which involved a likely double route of activated C regeneration, i.e., liq. and surface pollutant oxidn. [on SciFinder (R)]",
keywords = "Water purification (adsorption, Oxidation (wet air, activated carbon, loaded activated carbon regeneration, wet air oxidn regeneration loaded com activated carbon, water purifn wastewater treatment MCPA adsorption removal activated carbon, and reversibility of dissolved MCPA adsorptive removal from water and wastewater using com. activated carbon), Wastewater treatment, Ashes, equil., Reaction kinetics (non-equil. adsorption, Particle size (com. activated carbon, Adsorption enthalpy (isosteric, equil kinetics reversibility MCPA removal com activated carbon adsorption, kinetics, com. activated carbon",
author = "Olga Gimeno and Pawel Plucinski and Kolaczkowski, {Stan T} and Rivas, {Francisco J} and Alvarez, {Pedro M}",
year = "2003",
language = "English",
volume = "42",
pages = "1076--1086",
journal = "Industrial & Engineering Chemistry Research",
issn = "0888-5885",
publisher = "American Chemical Society",
number = "5",

}

TY - JOUR

T1 - Removal of the Herbicide MCPA by Commercial Activated Carbons: Equilibrium, Kinetics, and Reversibility

AU - Gimeno, Olga

AU - Plucinski, Pawel

AU - Kolaczkowski, Stan T

AU - Rivas, Francisco J

AU - Alvarez, Pedro M

PY - 2003

Y1 - 2003

N2 - Adsorption of the herbicide MCPA (4-chloro-2-methylphenoxyacetic acid) was studied using 4 com. activated carbons (Norit 0.8, Aquacarb 207C, Aquacarb 208A, Aquacarb 208EA). Adsorption equil. isotherms were obtained at 293-358 K. The trend of MCPA adsorption onto these activated carbons was: Norit 0.8 > Aquacarb 207C > Aquacarb 208A > Aquacarb 208EA. Among various adsorption isotherm models, the Freundlich equation best fit the exptl. data. Expts. conducted at different temps. allowed calcn. of the isosteric heat of adsorption and showed adsorption was exothermic for 3 of the 4 carbons studied. Herbicide distribution in the activated C pores of Norit 0.8 was studied by considering the Dubinin-Radushkevich isotherm. Adsorption kinetics were assessed using a simplistic mechanism based on the shrinking-core mass-transfer model. As a preliminary step for the potential use of wet air oxidn. (WAO) to regenerate exhausted activated C, adsorption process reversibility was tested. Only partial desorption of MCPA was achieved under WAO conditions, which involved a likely double route of activated C regeneration, i.e., liq. and surface pollutant oxidn. [on SciFinder (R)]

AB - Adsorption of the herbicide MCPA (4-chloro-2-methylphenoxyacetic acid) was studied using 4 com. activated carbons (Norit 0.8, Aquacarb 207C, Aquacarb 208A, Aquacarb 208EA). Adsorption equil. isotherms were obtained at 293-358 K. The trend of MCPA adsorption onto these activated carbons was: Norit 0.8 > Aquacarb 207C > Aquacarb 208A > Aquacarb 208EA. Among various adsorption isotherm models, the Freundlich equation best fit the exptl. data. Expts. conducted at different temps. allowed calcn. of the isosteric heat of adsorption and showed adsorption was exothermic for 3 of the 4 carbons studied. Herbicide distribution in the activated C pores of Norit 0.8 was studied by considering the Dubinin-Radushkevich isotherm. Adsorption kinetics were assessed using a simplistic mechanism based on the shrinking-core mass-transfer model. As a preliminary step for the potential use of wet air oxidn. (WAO) to regenerate exhausted activated C, adsorption process reversibility was tested. Only partial desorption of MCPA was achieved under WAO conditions, which involved a likely double route of activated C regeneration, i.e., liq. and surface pollutant oxidn. [on SciFinder (R)]

KW - Water purification (adsorption

KW - Oxidation (wet air

KW - activated carbon

KW - loaded activated carbon regeneration

KW - wet air oxidn regeneration loaded com activated carbon

KW - water purifn wastewater treatment MCPA adsorption removal activated carbon

KW - and reversibility of dissolved MCPA adsorptive removal from water and wastewater using com. activated carbon)

KW - Wastewater treatment

KW - Ashes

KW - equil.

KW - Reaction kinetics (non-equil. adsorption

KW - Particle size (com. activated carbon

KW - Adsorption enthalpy (isosteric

KW - equil kinetics reversibility MCPA removal com activated carbon adsorption

KW - kinetics

KW - com. activated carbon

M3 - Article

VL - 42

SP - 1076

EP - 1086

JO - Industrial & Engineering Chemistry Research

JF - Industrial & Engineering Chemistry Research

SN - 0888-5885

IS - 5

ER -