Feedbacks between hydrological heterogeneity and bioremediation induced biogeochemical transformations

A. Englert, S. S. Hubbard, K. H. Williams, Li Li, C. I. Steefel

Research output: Contribution to journalArticle

33 Citations (Scopus)

Abstract

For guiding optimal design and interpretation of in situ treatments that strongly perturb subsurface systems, knowledge about the spatial and temporal patterns of mass transport and reaction intensities are important. Here, a procedure was developed and applied to time-lapse concentrations of a conservative tracer (bromide), an injected amendment (acetate) and reactive species (iron(II), uranium(VI) and sulfate) associated with two field scale biostimulation experiments, which were conducted successively at the same field location over two years. The procedure is based on a temporal moment analysis approach that relies on a streamtube approximation. The study shows that biostimulated reactions can be considerably influenced by subsurface hydrological and geochemical heterogeneities: the delivery of bromide and acetate and the intensity of the sulfate reduction is interpreted to be predominantly driven by the hydrological heterogeneity, while the intensity of the iron reduction is interpreted to be primarily controlled by the geochemical heterogeneity. The intensity of the uranium(VI) reduction appears to be impacted by both the hydrological and geochemical heterogeneity. Finally, the study documents the existence of feedbacks between hydrological heterogeneity and remediation-induced biogeochemical transformations at the field scale, particularly the development of precipitates that may cause clogging and flow rerouting.

Original languageEnglish (US)
Pages (from-to)5197-5204
Number of pages8
JournalEnvironmental Science and Technology
Volume43
Issue number14
DOIs
StatePublished - Jul 15 2009

Fingerprint

Bioremediation
bioremediation
Uranium
Bromides
Feedback
Sulfates
Acetates
Iron
bromide
Remediation
uranium
acetate
Precipitates
sulfate
Mass transfer
iron
mass transport
remediation
tracer
Experiments

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Environmental Chemistry

Cite this

Englert, A. ; Hubbard, S. S. ; Williams, K. H. ; Li, Li ; Steefel, C. I. / Feedbacks between hydrological heterogeneity and bioremediation induced biogeochemical transformations. In: Environmental Science and Technology. 2009 ; Vol. 43, No. 14. pp. 5197-5204.
@article{b5e7f71f465c47c582d142de7c920ab8,
title = "Feedbacks between hydrological heterogeneity and bioremediation induced biogeochemical transformations",
abstract = "For guiding optimal design and interpretation of in situ treatments that strongly perturb subsurface systems, knowledge about the spatial and temporal patterns of mass transport and reaction intensities are important. Here, a procedure was developed and applied to time-lapse concentrations of a conservative tracer (bromide), an injected amendment (acetate) and reactive species (iron(II), uranium(VI) and sulfate) associated with two field scale biostimulation experiments, which were conducted successively at the same field location over two years. The procedure is based on a temporal moment analysis approach that relies on a streamtube approximation. The study shows that biostimulated reactions can be considerably influenced by subsurface hydrological and geochemical heterogeneities: the delivery of bromide and acetate and the intensity of the sulfate reduction is interpreted to be predominantly driven by the hydrological heterogeneity, while the intensity of the iron reduction is interpreted to be primarily controlled by the geochemical heterogeneity. The intensity of the uranium(VI) reduction appears to be impacted by both the hydrological and geochemical heterogeneity. Finally, the study documents the existence of feedbacks between hydrological heterogeneity and remediation-induced biogeochemical transformations at the field scale, particularly the development of precipitates that may cause clogging and flow rerouting.",
author = "A. Englert and Hubbard, {S. S.} and Williams, {K. H.} and Li Li and Steefel, {C. I.}",
year = "2009",
month = "7",
day = "15",
doi = "10.1021/es803367n",
language = "English (US)",
volume = "43",
pages = "5197--5204",
journal = "Environmental Science & Technology",
issn = "0013-936X",
publisher = "American Chemical Society",
number = "14",

}

Feedbacks between hydrological heterogeneity and bioremediation induced biogeochemical transformations. / Englert, A.; Hubbard, S. S.; Williams, K. H.; Li, Li; Steefel, C. I.

In: Environmental Science and Technology, Vol. 43, No. 14, 15.07.2009, p. 5197-5204.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Feedbacks between hydrological heterogeneity and bioremediation induced biogeochemical transformations

AU - Englert, A.

AU - Hubbard, S. S.

AU - Williams, K. H.

AU - Li, Li

AU - Steefel, C. I.

PY - 2009/7/15

Y1 - 2009/7/15

N2 - For guiding optimal design and interpretation of in situ treatments that strongly perturb subsurface systems, knowledge about the spatial and temporal patterns of mass transport and reaction intensities are important. Here, a procedure was developed and applied to time-lapse concentrations of a conservative tracer (bromide), an injected amendment (acetate) and reactive species (iron(II), uranium(VI) and sulfate) associated with two field scale biostimulation experiments, which were conducted successively at the same field location over two years. The procedure is based on a temporal moment analysis approach that relies on a streamtube approximation. The study shows that biostimulated reactions can be considerably influenced by subsurface hydrological and geochemical heterogeneities: the delivery of bromide and acetate and the intensity of the sulfate reduction is interpreted to be predominantly driven by the hydrological heterogeneity, while the intensity of the iron reduction is interpreted to be primarily controlled by the geochemical heterogeneity. The intensity of the uranium(VI) reduction appears to be impacted by both the hydrological and geochemical heterogeneity. Finally, the study documents the existence of feedbacks between hydrological heterogeneity and remediation-induced biogeochemical transformations at the field scale, particularly the development of precipitates that may cause clogging and flow rerouting.

AB - For guiding optimal design and interpretation of in situ treatments that strongly perturb subsurface systems, knowledge about the spatial and temporal patterns of mass transport and reaction intensities are important. Here, a procedure was developed and applied to time-lapse concentrations of a conservative tracer (bromide), an injected amendment (acetate) and reactive species (iron(II), uranium(VI) and sulfate) associated with two field scale biostimulation experiments, which were conducted successively at the same field location over two years. The procedure is based on a temporal moment analysis approach that relies on a streamtube approximation. The study shows that biostimulated reactions can be considerably influenced by subsurface hydrological and geochemical heterogeneities: the delivery of bromide and acetate and the intensity of the sulfate reduction is interpreted to be predominantly driven by the hydrological heterogeneity, while the intensity of the iron reduction is interpreted to be primarily controlled by the geochemical heterogeneity. The intensity of the uranium(VI) reduction appears to be impacted by both the hydrological and geochemical heterogeneity. Finally, the study documents the existence of feedbacks between hydrological heterogeneity and remediation-induced biogeochemical transformations at the field scale, particularly the development of precipitates that may cause clogging and flow rerouting.

UR - http://www.scopus.com/inward/record.url?scp=67650462701&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=67650462701&partnerID=8YFLogxK

U2 - 10.1021/es803367n

DO - 10.1021/es803367n

M3 - Article

VL - 43

SP - 5197

EP - 5204

JO - Environmental Science & Technology

JF - Environmental Science & Technology

SN - 0013-936X

IS - 14

ER -