A Simple Tenax® Extraction Method to Determine the Availability of Sediment-Sorbed Organic Compounds

Cornelissen, Gerard; Rigterink, Henk; Hulscher, D.E.M. ten; Vrind, Bea A.; Noort, Paul C.M. van

doi:10.1897/1551-5028(2001)020<0706:astemt>2.0.co;2

Cited by 10 publications

(6 citation statements)

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“…3,22,23,31,[48][49][50] The amounts of HOCs desorbed are dependent on the exposure time of the sorbent to the sediment slurry, correlations between F rap and desorption fraction at the single time-point were observed. 51 As a result, Cornelissen et al 51 suggested that a simplified Tenax extraction at a single time-point, representative of F rap , could also be correlated to organism tissue residues.…”

Section: Tenax Extraction Theoretical Considerations and Methodologiesmentioning

confidence: 99%

Chemical techniques for assessing bioavailability of sediment-associated contaminants: SPME versus Tenax extraction

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Harwood

et al. 2011

J. Environ. Monit.

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The traditional approach for predicting the risk of hydrophobic organic contaminants (HOCs) in sediment is to relate organic carbon normalized sediment concentrations to body residues or toxic effects to organisms. However, due to the multiple variables controlling bioavailability, this method has limitations. A matrix independent method of predicting bioavailability needs to be used in order to be universally applicable. Both chemical activity (freely dissolved chemical concentrations) measured by solid-phase microextraction (SPME) and bioaccessibility (rapidly desorbing fraction) estimated by Tenax extraction have been developed to predict bioavailability of sediment-associated HOCs. The objectives of this review are to summarize a number of studies using matrix-SPME or Tenax extraction to estimate bioavailability and/or toxicity of different classes of HOCs and evaluate the strengths and weakness of these two techniques. Although the two chemical techniques assess different components of the matrix, estimates obtained from both techniques have been correlated to organism body residues. The advantages of SPME fibers are their applicability for use in situ and their potential usage for a wide array of contaminants by selection of appropriate coatings. Single time-point Tenax extraction, however, is more time-and labor-effective. Tenax extraction also has lower detection limits, making it more applicable for highly toxic contaminants. This review also calls for additional research to evaluate the role of sequestrated contaminants and ingestion of sediment particles by organisms on HOC bioavailability. The use of performance reference compounds to reduce SPME sampling time and linking chemical based bioavailability estimates to toxicological endpoints are essential to expand the applications of these methods.

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Section: Tenax Extraction Theoretical Considerations and Methodologiesmentioning

confidence: 99%

Chemical techniques for assessing bioavailability of sediment-associated contaminants: SPME versus Tenax extraction

You

Harwood

et al. 2011

J. Environ. Monit.

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“…The first hypothesis would have 466 to be verified by implementing a cell culture similar to the one realised by Tiehm (1994) to 467 assess whether PAHs-degraders could use saponins from Quillaja saponaria bark as primary 468 nutrients over PAHs and the second by evaluating the bioavailability of PAHs in the presence of 469 saponins through the use of Tenax® beads for example [Cornelissen et al, 2001]. 470…”

Section: Chrysenementioning

confidence: 99%

Could saponins be used to enhance bioremediation of polycyclic aromatic hydrocarbons in aged-contaminated soils?

et al. 2018

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21Polycyclic aromatic hydrocarbons (PAH) are persistent organic compounds of major concern 22 that tend to accumulate in the environment, threatening ecosystems and health. Brownfields 23 represent an important tank for PAHs and require remediation. 24Researches to develop bioremediation and phytoremediation techniques are being conducted as 25 alternatives to environmentally aggressive, expensive and often disruptive soil remediation 26 strategies. 27The objectives of the present study were to investigate the potential of saponins (natural 28 surfactants) as extracting agents and as bioremediation enhancers on an aged-contaminated soil. 29Two experiments were conducted on a brownfield soil containing 15 PAHs. In a first 30 experiment, soil samples were extracted with saponins solutions (0; 1; 2; 4 and 8 g.L -1 ). In a 31 second experiment conducted in microcosms (28°C), soil samples were incubated for 14 or 28 32 days in presence of saponins (0; 2.5 and 5 mg.g -1 ). CO 2 emissions were monitored throughout 33 the experiment. After the incubation, dehydrogenase activity was measured as an indicator of 34 microbiological activity and residual PAHs were determined. In both experiments PAHs were 35 determined using High-Performance Liquid Chromatography and Fluorimetric Detection. 36The 4 g.L -1 saponins solution extracted significantly more acenaphtene, fluorene, phenanthrene, 37 anthracene, and pyrene than water. PAHs remediation was not enhanced in presence of saponins 38 compared to control samples after 28 days. However CO 2 emissions and dehydrogenase 39 activities were significantly more important in presence of saponins, suggesting no toxic effect 40 of these surfactants towards soil microbiota. 41

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“…There are new, sophisticated approaches that can characterize the bioavailability of contaminants and they may construct lines of evidence between contamination and e¡ects on organisms living in the sediment [8,73]. These are at ¢rst simple resin extraction methods (e.g., use of Tenax) to determine the availability of sediment-sorbed organic compounds [74].…”

Section: Surveillance Investigations (''Memory E¡ect'')mentioning

confidence: 99%

Traceability of sediment analysis

Förstner

2004

TrAC Trends in Analytical Chemistry

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Chemical analysis of sediments provides an efficient tool for water-quality management. A basic sequence of measurements comprises three steps: sampling and sample preparation; grain size as a characteristic sediment feature; and, analytical procedures based on standardized extraction schemes and reference materials. These can be considered as an unbroken chain of comparisons. Further steps are split with regard to specific purposes: sediment-quality assessment, including biological effects; coupling of sediment-quality data with erosion-risk evaluation; chemical changes following resuspension of anoxic sediments; and, modeling of chemical sediment data. In the light of the economic value of these further steps for developing and executing far-reaching management plans, coordinated efforts should be made to improve their traceability (e.g., by organized dissemination of results from on-going research (ageing effects), official documentation of techniques and instruments in a relative new field (erosion effects), extension of standardized extraction schemes (anoxic sediments, capacity-controlling properties), and development of new reference materials (pore water)). #

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A Simple Tenax® Extraction Method to Determine the Availability of Sediment-Sorbed Organic Compounds

Cited by 10 publications

References 0 publications

Chemical techniques for assessing bioavailability of sediment-associated contaminants: SPME versus Tenax extraction

Chemical techniques for assessing bioavailability of sediment-associated contaminants: SPME versus Tenax extraction

Could saponins be used to enhance bioremediation of polycyclic aromatic hydrocarbons in aged-contaminated soils?

Traceability of sediment analysis

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