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Title: Application of an in-situ soil sampler for assessing subsurface biogeochemical dynamics in a diesel-contaminated coastal site during soil flushing operations

Abstract

Subsurface biogeochemistry and contaminant dynamics during the remediation of diesel-contamination by in-situ soil flushing were investigated at a site located in a coastal region. An in-situ sampler containing diesel-contaminated soils separated into two size fractions (<0.063- and <2-mm) was utilized in two monitoring wells: DH1 (located close to the injection and extraction wells for in-situ soil flushing) and DH2 (located beyond sheet piles placed to block the transport of leaked diesel). Total petroleum hydrocarbon (TPH) concentrations and biogeochemical properties were monitored both in soil and groundwater for six months. A shift occurred in the groundwater type from Ca-HCO 3 to Na-CI due to seawater intrusion during intense pumping, while the concentrations of Ni, Cu, Co, V, Cr, and Se increased substantially following surfactant (TWEEN 80) injection. The in-situ sampler with fine particles was more sensitive to variations in conditions during the remedial soil flushing process. In both wells, soil TPH concentrations in the <0.063-mm fraction were much higher than those in the <2-mm fraction. Increases in soil TPH in DH1 were consistent with the expected outcomes following well pumping and surfactant injection used to enhance TPH extraction. However, the number of diesel-degrading microorganisms decreased after surfactant injection. 16S-rRNA gene-based analysismore » also showed that the community composition and diversity depended on both particle size and diesel contamination. The multidisciplinary approach to the contaminated site assessments showed that soil flushing with surfactant enhanced diesel extraction, but negatively impacted in-situ diesel biodegradation as well as groundwater quality. In conclusion, the results also suggest that the in-situ sampler can be an effective monitoring tool for subsurface biogeochemistry as well as contaminant dynamics.« less

Authors:
 [1];  [2];  [3];  [4];  [4];  [5]
  1. Korea Univ., Seoul (Korea). Dept. Earth and Environmental Sciences; Korea Univ., Seoul (Korea). Green School
  2. Argonne National Lab. (ANL), Argonne, IL (United States). Biosciences Division
  3. Korea Univ., Seoul (Korea). Green School
  4. Korea Inst. of Science and Technology, Gangneung (Korea)
  5. Korea Univ., Seoul (Korea). Dept. Earth and Environmental Sciences
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
Korea Institute of Science and Technology (KIST); Korea Ministry of Environment; KIST–Gangneung Institute; USDOE
OSTI Identifier:
1466334
Grant/Contract Number:  
AC02-06CH11357; 2Z04221
Resource Type:
Accepted Manuscript
Journal Name:
Journal of Environmental Management
Additional Journal Information:
Journal Volume: 206; Journal Issue: C; Journal ID: ISSN 0301-4797
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES; 02 PETROLEUM; diesel contamination; in-situ sampler; microbial community dynamics; seawater intrusion; soil flushing

Citation Formats

Kwon, Man Jae, O'Loughlin, Edward J., Ham, Baknoon, Hwang, Yunho, Shim, Moojoon, and Lee, Soonjae. Application of an in-situ soil sampler for assessing subsurface biogeochemical dynamics in a diesel-contaminated coastal site during soil flushing operations. United States: N. p., 2017. Web. doi:10.1016/j.jenvman.2017.11.053.
Kwon, Man Jae, O'Loughlin, Edward J., Ham, Baknoon, Hwang, Yunho, Shim, Moojoon, & Lee, Soonjae. Application of an in-situ soil sampler for assessing subsurface biogeochemical dynamics in a diesel-contaminated coastal site during soil flushing operations. United States. doi:10.1016/j.jenvman.2017.11.053.
Kwon, Man Jae, O'Loughlin, Edward J., Ham, Baknoon, Hwang, Yunho, Shim, Moojoon, and Lee, Soonjae. Thu . "Application of an in-situ soil sampler for assessing subsurface biogeochemical dynamics in a diesel-contaminated coastal site during soil flushing operations". United States. doi:10.1016/j.jenvman.2017.11.053. https://www.osti.gov/servlets/purl/1466334.
@article{osti_1466334,
title = {Application of an in-situ soil sampler for assessing subsurface biogeochemical dynamics in a diesel-contaminated coastal site during soil flushing operations},
author = {Kwon, Man Jae and O'Loughlin, Edward J. and Ham, Baknoon and Hwang, Yunho and Shim, Moojoon and Lee, Soonjae},
abstractNote = {Subsurface biogeochemistry and contaminant dynamics during the remediation of diesel-contamination by in-situ soil flushing were investigated at a site located in a coastal region. An in-situ sampler containing diesel-contaminated soils separated into two size fractions (<0.063- and <2-mm) was utilized in two monitoring wells: DH1 (located close to the injection and extraction wells for in-situ soil flushing) and DH2 (located beyond sheet piles placed to block the transport of leaked diesel). Total petroleum hydrocarbon (TPH) concentrations and biogeochemical properties were monitored both in soil and groundwater for six months. A shift occurred in the groundwater type from Ca-HCO3 to Na-CI due to seawater intrusion during intense pumping, while the concentrations of Ni, Cu, Co, V, Cr, and Se increased substantially following surfactant (TWEEN 80) injection. The in-situ sampler with fine particles was more sensitive to variations in conditions during the remedial soil flushing process. In both wells, soil TPH concentrations in the <0.063-mm fraction were much higher than those in the <2-mm fraction. Increases in soil TPH in DH1 were consistent with the expected outcomes following well pumping and surfactant injection used to enhance TPH extraction. However, the number of diesel-degrading microorganisms decreased after surfactant injection. 16S-rRNA gene-based analysis also showed that the community composition and diversity depended on both particle size and diesel contamination. The multidisciplinary approach to the contaminated site assessments showed that soil flushing with surfactant enhanced diesel extraction, but negatively impacted in-situ diesel biodegradation as well as groundwater quality. In conclusion, the results also suggest that the in-situ sampler can be an effective monitoring tool for subsurface biogeochemistry as well as contaminant dynamics.},
doi = {10.1016/j.jenvman.2017.11.053},
journal = {Journal of Environmental Management},
number = C,
volume = 206,
place = {United States},
year = {2017},
month = {12}
}

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