Accelerated Solvent Extraction:  An Evaluation for Screening of Soils for Selected U.S. EPA Semivolatile Organic Priority Pollutants

Fisher, John Andrew; Scarlett, M.J.; Stott, Aaron D.

doi:10.1021/es9606283

Cited by 121 publications

(49 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…First, 10 to 15 g of sediment was dried with diatomaceous earth and then extracted in methanol using accelerated solvent extraction. The extracts were concentrated under a N 2 stream (Speedvap) and analyzed by GC/MS (Fisher et al 1997). p-Terphenyl-d 14 and 2-fluorobiphenyl were used as surrogate standards, following the method described in Pohlman et al (2002).…”

Section: Contaminant Concentrationmentioning

confidence: 99%

Mineralization of 2,4,6-Trinitrotoleune (TNT) in Coastal Waters and Sediments

Walker¹,

Osburn²,

Boyd³

et al. 2006

View full text Add to dashboard Cite

Standard Form 298 (Rev. 8-98)Prescribed by ANSI Std. Z39.18Public reporting burden for this collection of information is estimated to average 1 hour per response, including the time for reviewing instructions, searching existing data sources, gathering and maintaining the data needed, and completing and reviewing this collection of information. Approved for public release; distribution is unlimited. PERFORMING ORGANIZATION NAME(S) AND ADDRESS(ES) SPONSOR / MONITOR'S ACRONYM(S) 9. SPONSORING / MONITORING AGENCY NAME(S) AND ADDRESS(ES)11 Unclassified Unclassified UnclassifiedUnlimited 42Michael T. Montgomery 202-404-6419Mineralization rates of 14C-TNT, -DNT, and -DAT were measured in surface sediments, with depth in sediment cores, and in the water column during 12 research cruises over the past 4 years in the San Francisco Bay, Chesapeake Bay, and Hawaii. Mineralization rates were also compared to uptake and incorporation rates of TNT, DNT, and DAT into the natural microbial assemblage. In general, the bacterial mineralizations rates were similar, or an order of magnitude faster, than those for organic hydrocarbons measured at the same time. Using seawater sampled from a historical UXO field, we found that while bacterial mineralization was rapid (>1 ug L-1 d-1, unfiltered water in dark), photodegradation was even faster (16 ug L-1 d-1, filtered water in light) and the combination of light and unfiltered water was greater than the sum of the two rates (103 ug L-1 d-1), suggesting either that the prescnce of active phytoplankton is important or photodegradation enhances bacterial mineralization.

show abstract

Section: Contaminant Concentrationmentioning

confidence: 99%

Mineralization of 2,4,6-Trinitrotoleune (TNT) in Coastal Waters and Sediments

Walker¹,

Osburn²,

Boyd³

et al. 2006

View full text Add to dashboard Cite

show abstract

“…In order to compare total and bioavailable concentrations, two different extraction techniques were used; one efficient extraction with toluene and one mild extraction with n-butanol. Butanol is proposed to closely estimate the amount of bioavailable pollutants in contaminated soils and correlate with the uptake of some PAHs in earthworms (Liste & Alexander, 2002) and the toluene fraction represents total concentrations (Fisher et al 1997). Soils sampled on five occasions between day 0 and day 274 of biological treatment were extracted and analyzed chemically for the 16 US EPA priority PAHs and tested in the CALUX and Comet bioassays.…”

mentioning

confidence: 99%

AhR agonist and genotoxicant bioavailability in a PAH-contaminated soil undergoing biological treatment

Andersson

Rotander

Kronhelm³

et al. 2009

Environ Sci Pollut Res

View full text Add to dashboard Cite

It has to be ensured that soft remediation methods like biodegradation or the natural remediation approach do not result in the mobilization of toxic compounds including more mobile degradation products. For PAH-contaminated sites this cannot be assured merely by monitoring the 16 target PAHs. The combined use of a battery of biotests for different types of PAH effects such as the CALUX and the Comet assay together with bioavailability extraction methods may be a useful screening tool of bioremediation processes of PAH-contaminated soil and contribute to a more accurate risk assessment. If the bioremediation causes a release of bound PAHs that are left undegraded in an easily extracted fraction, the soil may be more toxic to organisms living in the soil as a result of the treatment. A prolonged treatment time may be one way to reduce the risk of remaining mobile PAHs. In critical cases, the remediation concept might have to be changed to ex situ remediation methods.

show abstract

“…First, 10-15 g of sediment was dried with 13 diatomaceous earth and then extracted in methanol using accelerated solvent extraction. The extracts were concentrated under a N 2 stream (Speedvap) and analyzed by GC/MS (Fisher et al 1997). p-Terphenyl-d 14 and 2-fluorobiphenyl were used as surrogate standards, following the method described in Pohlman et al (2002).…”

Section: Contaminant Concentrationmentioning

confidence: 99%

Union Support Recovery in High-Dimensional Multivariate Regression

Obozinski

Wainwright

Jordan

2008

View full text Add to dashboard Cite

Standard Form 298 (Rev. 8-98)Prescribed by ANSI Std. Z39.18Public reporting burden for this collection of information is estimated to average 1 hour per response, including the time for reviewing instructions, searching existing data sources, gathering and maintaining the data needed, and completing and reviewing this collection of information. Once released in the environment, either through detonation, casing breakage, or by slow leaks from unexploded ordnance (UXO), nitrogenous energetic compounds (NEC, such as TNT, HMX, RDX) may sorb onto particulates, partition to dissolved organic matter, or remain dissolved in aqueous media. Our hypothesis was that NEC would be transient in coastal ecosystems. This was based primarily on the understanding that microbial growth in these systems is typically nitrogen-limited and there are few examples of nitrogen based organic compounds that are not rapidly metabolized in these environments. During 14 sampling events in coastal waterways from 2002 to 2007, we measured TNT mineralization rates in surface sediment and water samples that were often the same as, or within one order of magnitude of, the rate of total heterotrophic bacterial metabolism. These rates were often similar to those of other organic compounds that are transient in natural ecosystems due to their use in bacterial metabolism, such as petroleum hydrocarbons and amino acids. PERFORMING ORGANIZATION NAME(S) AND ADDRESS(ES) SPONSOR / MONITOR'S ACRONYM(S) 9. SPONSORING / MONITORING AGENCY NAME(S) AND ADDRESS(ES) SPONSOR / MONITOR'S REPORT NUMBER(S)

show abstract

Accelerated Solvent Extraction: An Evaluation for Screening of Soils for Selected U.S. EPA Semivolatile Organic Priority Pollutants

Cited by 121 publications

References 0 publications

Mineralization of 2,4,6-Trinitrotoleune (TNT) in Coastal Waters and Sediments

Mineralization of 2,4,6-Trinitrotoleune (TNT) in Coastal Waters and Sediments

AhR agonist and genotoxicant bioavailability in a PAH-contaminated soil undergoing biological treatment

Union Support Recovery in High-Dimensional Multivariate Regression

Contact Info

Product

Resources

About