Attenuation of aqueous benzene in soils under saturated flow conditions

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

The fate of aqueous benzene in subsurface was investigated in this study, focusing on the role of sorption and biodegradation on the benzene attenuation under dynamic flow conditions. Two sets of column tests were conducted in Plexiglass flow cells packed uniformly with sandy aquifer materials. The first set of the experiment was conducted with a step-type injection of benzene with different powder activated carbon (PAC) contents: (1) PAC = 0%; (2) PAC = 0.5%; (3) PAC = 2.0%. The second set was performed as a pulse-type with different test conditions: (4) benzene; (5) benzene and bacteria (Pseudomonas aeruginosa); (6) benzene and bacteria (P. aeruginosa) with hydrogen peroxide. In addition, numerical experiments were performed to examine the role of sorption processes on the benzene attenuation. In the step mode experiments, the KCl breakthrough curves (BTCs) reached the input concentration while the benzene BTCs were considerably lower than those of KCl with slight retardation for all cases, indicating that both reversible/retardation and irreversible sorption occurred. The pulse type tests showed that attenuation of benzene increased in the presence of bacteria due to biodegradation. The benzene attenuation by microbial degradation increased furthermore in the presence of hydrogen peroxide owing to sufficient supply of dissolved oxygen in soil column. Numerical experiments demonstrated that retardation could not contribute to the attenuation of benzene in soils but could only extend its breakthrough time. Experimental results indicated that aqueous benzene could be attenuated by irreversible sorption and biodegradation during transport through the subsurface. Additionally, the attenuation of aqueous benzene is closely related to organic carbon content and oxygen level existing in contaminated aquifers.

Original languageEnglish
Pages (from-to)33-40
Number of pages8
JournalEnvironmental Technology
Volume27
Issue number1
DOIs
Publication statusPublished - 2006 Jan 1

Fingerprint

Benzene
benzene
Soil
Soils
soil
Carbon
Powders
Activated carbon
activated carbon
Sorption
sorption
Biodegradation
biodegradation
Bacteria
Groundwater
breakthrough curve
Aquifers
Pseudomonas aeruginosa
hydrogen peroxide
Hydrogen Peroxide

Keywords

  • Benzene
  • Biodegradation
  • Contaminant transport
  • Monitored natural attenuation
  • Sorption

ASJC Scopus subject areas

  • Environmental Science(all)
  • Environmental Chemistry

Cite this

Attenuation of aqueous benzene in soils under saturated flow conditions. / Kim, S. B.; Kim, Dong Ju; Yun, Seong Taek.

In: Environmental Technology, Vol. 27, No. 1, 01.01.2006, p. 33-40.

Research output: Contribution to journalArticle

@article{8787fd9c416646508051f41e5853a618,
title = "Attenuation of aqueous benzene in soils under saturated flow conditions",
abstract = "The fate of aqueous benzene in subsurface was investigated in this study, focusing on the role of sorption and biodegradation on the benzene attenuation under dynamic flow conditions. Two sets of column tests were conducted in Plexiglass flow cells packed uniformly with sandy aquifer materials. The first set of the experiment was conducted with a step-type injection of benzene with different powder activated carbon (PAC) contents: (1) PAC = 0{\%}; (2) PAC = 0.5{\%}; (3) PAC = 2.0{\%}. The second set was performed as a pulse-type with different test conditions: (4) benzene; (5) benzene and bacteria (Pseudomonas aeruginosa); (6) benzene and bacteria (P. aeruginosa) with hydrogen peroxide. In addition, numerical experiments were performed to examine the role of sorption processes on the benzene attenuation. In the step mode experiments, the KCl breakthrough curves (BTCs) reached the input concentration while the benzene BTCs were considerably lower than those of KCl with slight retardation for all cases, indicating that both reversible/retardation and irreversible sorption occurred. The pulse type tests showed that attenuation of benzene increased in the presence of bacteria due to biodegradation. The benzene attenuation by microbial degradation increased furthermore in the presence of hydrogen peroxide owing to sufficient supply of dissolved oxygen in soil column. Numerical experiments demonstrated that retardation could not contribute to the attenuation of benzene in soils but could only extend its breakthrough time. Experimental results indicated that aqueous benzene could be attenuated by irreversible sorption and biodegradation during transport through the subsurface. Additionally, the attenuation of aqueous benzene is closely related to organic carbon content and oxygen level existing in contaminated aquifers.",
keywords = "Benzene, Biodegradation, Contaminant transport, Monitored natural attenuation, Sorption",
author = "Kim, {S. B.} and Kim, {Dong Ju} and Yun, {Seong Taek}",
year = "2006",
month = "1",
day = "1",
doi = "10.1080/09593332708618614",
language = "English",
volume = "27",
pages = "33--40",
journal = "Environmental Technology (United Kingdom)",
issn = "0959-3330",
publisher = "Taylor and Francis Ltd.",
number = "1",

}

TY - JOUR

T1 - Attenuation of aqueous benzene in soils under saturated flow conditions

AU - Kim, S. B.

AU - Kim, Dong Ju

AU - Yun, Seong Taek

PY - 2006/1/1

Y1 - 2006/1/1

N2 - The fate of aqueous benzene in subsurface was investigated in this study, focusing on the role of sorption and biodegradation on the benzene attenuation under dynamic flow conditions. Two sets of column tests were conducted in Plexiglass flow cells packed uniformly with sandy aquifer materials. The first set of the experiment was conducted with a step-type injection of benzene with different powder activated carbon (PAC) contents: (1) PAC = 0%; (2) PAC = 0.5%; (3) PAC = 2.0%. The second set was performed as a pulse-type with different test conditions: (4) benzene; (5) benzene and bacteria (Pseudomonas aeruginosa); (6) benzene and bacteria (P. aeruginosa) with hydrogen peroxide. In addition, numerical experiments were performed to examine the role of sorption processes on the benzene attenuation. In the step mode experiments, the KCl breakthrough curves (BTCs) reached the input concentration while the benzene BTCs were considerably lower than those of KCl with slight retardation for all cases, indicating that both reversible/retardation and irreversible sorption occurred. The pulse type tests showed that attenuation of benzene increased in the presence of bacteria due to biodegradation. The benzene attenuation by microbial degradation increased furthermore in the presence of hydrogen peroxide owing to sufficient supply of dissolved oxygen in soil column. Numerical experiments demonstrated that retardation could not contribute to the attenuation of benzene in soils but could only extend its breakthrough time. Experimental results indicated that aqueous benzene could be attenuated by irreversible sorption and biodegradation during transport through the subsurface. Additionally, the attenuation of aqueous benzene is closely related to organic carbon content and oxygen level existing in contaminated aquifers.

AB - The fate of aqueous benzene in subsurface was investigated in this study, focusing on the role of sorption and biodegradation on the benzene attenuation under dynamic flow conditions. Two sets of column tests were conducted in Plexiglass flow cells packed uniformly with sandy aquifer materials. The first set of the experiment was conducted with a step-type injection of benzene with different powder activated carbon (PAC) contents: (1) PAC = 0%; (2) PAC = 0.5%; (3) PAC = 2.0%. The second set was performed as a pulse-type with different test conditions: (4) benzene; (5) benzene and bacteria (Pseudomonas aeruginosa); (6) benzene and bacteria (P. aeruginosa) with hydrogen peroxide. In addition, numerical experiments were performed to examine the role of sorption processes on the benzene attenuation. In the step mode experiments, the KCl breakthrough curves (BTCs) reached the input concentration while the benzene BTCs were considerably lower than those of KCl with slight retardation for all cases, indicating that both reversible/retardation and irreversible sorption occurred. The pulse type tests showed that attenuation of benzene increased in the presence of bacteria due to biodegradation. The benzene attenuation by microbial degradation increased furthermore in the presence of hydrogen peroxide owing to sufficient supply of dissolved oxygen in soil column. Numerical experiments demonstrated that retardation could not contribute to the attenuation of benzene in soils but could only extend its breakthrough time. Experimental results indicated that aqueous benzene could be attenuated by irreversible sorption and biodegradation during transport through the subsurface. Additionally, the attenuation of aqueous benzene is closely related to organic carbon content and oxygen level existing in contaminated aquifers.

KW - Benzene

KW - Biodegradation

KW - Contaminant transport

KW - Monitored natural attenuation

KW - Sorption

UR - http://www.scopus.com/inward/record.url?scp=33144458244&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=33144458244&partnerID=8YFLogxK

U2 - 10.1080/09593332708618614

DO - 10.1080/09593332708618614

M3 - Article

C2 - 16457173

AN - SCOPUS:33144458244

VL - 27

SP - 33

EP - 40

JO - Environmental Technology (United Kingdom)

JF - Environmental Technology (United Kingdom)

SN - 0959-3330

IS - 1

ER -