Diffusion of hydrophilic organic micropollutants in granular activated carbon with different pore sizes

Laura Piai, Jouke E. Dykstra, Mahesa G. Adishakti, Marco Blokland, Alette A.M. Langenhoff, Albert van der Wal

Research output: Contribution to journalArticleAcademicpeer-review

Abstract

Hydrophilic organic micropollutants are commonly detected in source water used for drinking water production. Effective technologies to remove these micropollutants from water include adsorption onto granular activated carbon in fixed-bed filters. The rate-determining step in adsorption using activated carbon is usually the adsorbate diffusion inside the porous adsorbent. The presence of mesopores can facilitate diffusion, resulting in higher adsorption rates. We used two different types of granular activated carbon, with and without mesopores, to study the adsorption rate of hydrophilic micropollutants. Furthermore, equilibrium studies were performed to determine the affinity of the selected micropollutants for the activated carbons. A pore diffusion model was applied to the kinetic data to obtain pore diffusion coefficients. We observed that the adsorption rate is influenced by the molecular size of the micropollutant as well as the granular activated carbon pore size.

LanguageEnglish
Pages518-527
Number of pages10
JournalWater Research
Volume162
Early online date6 Jun 2019
DOIs
Publication statusE-pub ahead of print - 6 Jun 2019

Fingerprint

Activated carbon
Pore size
activated carbon
adsorption
Adsorption
Biological filter beds
Adsorbates
Potable water
Adsorbents
Water
drinking water
micropollutant
filter
kinetics
Kinetics
rate
water

Keywords

  • Activated carbon
  • Adsorption kinetics
  • Hydrophilic micropollutants
  • Intra-particle diffusion
  • Pore diffusion

Cite this

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title = "Diffusion of hydrophilic organic micropollutants in granular activated carbon with different pore sizes",
abstract = "Hydrophilic organic micropollutants are commonly detected in source water used for drinking water production. Effective technologies to remove these micropollutants from water include adsorption onto granular activated carbon in fixed-bed filters. The rate-determining step in adsorption using activated carbon is usually the adsorbate diffusion inside the porous adsorbent. The presence of mesopores can facilitate diffusion, resulting in higher adsorption rates. We used two different types of granular activated carbon, with and without mesopores, to study the adsorption rate of hydrophilic micropollutants. Furthermore, equilibrium studies were performed to determine the affinity of the selected micropollutants for the activated carbons. A pore diffusion model was applied to the kinetic data to obtain pore diffusion coefficients. We observed that the adsorption rate is influenced by the molecular size of the micropollutant as well as the granular activated carbon pore size.",
keywords = "Activated carbon, Adsorption kinetics, Hydrophilic micropollutants, Intra-particle diffusion, Pore diffusion",
author = "Laura Piai and Dykstra, {Jouke E.} and Adishakti, {Mahesa G.} and Marco Blokland and Langenhoff, {Alette A.M.} and {van der Wal}, Albert",
year = "2019",
month = "6",
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doi = "10.1016/j.watres.2019.06.012",
language = "English",
volume = "162",
pages = "518--527",
journal = "Water Research",
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Diffusion of hydrophilic organic micropollutants in granular activated carbon with different pore sizes. / Piai, Laura; Dykstra, Jouke E.; Adishakti, Mahesa G.; Blokland, Marco; Langenhoff, Alette A.M.; van der Wal, Albert.

In: Water Research, Vol. 162, 01.10.2019, p. 518-527.

Research output: Contribution to journalArticleAcademicpeer-review

TY - JOUR

T1 - Diffusion of hydrophilic organic micropollutants in granular activated carbon with different pore sizes

AU - Piai, Laura

AU - Dykstra, Jouke E.

AU - Adishakti, Mahesa G.

AU - Blokland, Marco

AU - Langenhoff, Alette A.M.

AU - van der Wal, Albert

PY - 2019/6/6

Y1 - 2019/6/6

N2 - Hydrophilic organic micropollutants are commonly detected in source water used for drinking water production. Effective technologies to remove these micropollutants from water include adsorption onto granular activated carbon in fixed-bed filters. The rate-determining step in adsorption using activated carbon is usually the adsorbate diffusion inside the porous adsorbent. The presence of mesopores can facilitate diffusion, resulting in higher adsorption rates. We used two different types of granular activated carbon, with and without mesopores, to study the adsorption rate of hydrophilic micropollutants. Furthermore, equilibrium studies were performed to determine the affinity of the selected micropollutants for the activated carbons. A pore diffusion model was applied to the kinetic data to obtain pore diffusion coefficients. We observed that the adsorption rate is influenced by the molecular size of the micropollutant as well as the granular activated carbon pore size.

AB - Hydrophilic organic micropollutants are commonly detected in source water used for drinking water production. Effective technologies to remove these micropollutants from water include adsorption onto granular activated carbon in fixed-bed filters. The rate-determining step in adsorption using activated carbon is usually the adsorbate diffusion inside the porous adsorbent. The presence of mesopores can facilitate diffusion, resulting in higher adsorption rates. We used two different types of granular activated carbon, with and without mesopores, to study the adsorption rate of hydrophilic micropollutants. Furthermore, equilibrium studies were performed to determine the affinity of the selected micropollutants for the activated carbons. A pore diffusion model was applied to the kinetic data to obtain pore diffusion coefficients. We observed that the adsorption rate is influenced by the molecular size of the micropollutant as well as the granular activated carbon pore size.

KW - Activated carbon

KW - Adsorption kinetics

KW - Hydrophilic micropollutants

KW - Intra-particle diffusion

KW - Pore diffusion

U2 - 10.1016/j.watres.2019.06.012

DO - 10.1016/j.watres.2019.06.012

M3 - Article

VL - 162

SP - 518

EP - 527

JO - Water Research

T2 - Water Research

JF - Water Research

SN - 0043-1354

ER -