Evaluation of a Quaternary Resin for the Isolation or Concentration of Organic Substances from Water

Ben-Poorat, Shaaban; Kennedy, David C.; Byington, Carol H.

doi:10.1021/ba-1987-0214.ch025

Cited by 1 publication

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“…A high extraction efficiency by the sorbent was assumed (high influx from water to sorbent, and low efflux), so the uptake on the sorbent column was assumed to be approximately equal to the contaminant input from the sediment to the water during the experimental period. The assumption of high extraction efficiency of the sorbent columns is supported by the results of previous studies with XAD-2 resin columns which indicate high recoveries of organic contaminants for loadings ranging from trace (low ng/L) levels (Olufsen 1980;Daignault et al 1988) to concentrations that were several orders of magnitude greater than those observed during the present study (Junk et al 1974;Olufsen 1980;Ben-Poorat et al 1986;Grandi et al 1990). In addition, circulation of two spiked seawater samples (10 ixg/L with several PAHs) through the flux-flow series, resulted in percent recoveries ranging between 84.1 and 103.…”

Section: Site Selection and Sample Collectionsupporting

confidence: 84%

Release rates of polynuclear aromatic hydrocarbons from natural sediments and their relationship to solubility and octanol-water partitioning

Helmstetter

Alden

1994

Arch. Environ. Contam. Toxicol.

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Abstract. Sediment effiux rates of six polynuclear aromatic hydrocarbons (PAHs) were determined employing a novel boundary-layer flux chamber which concentrates trace organics using solid phase extraction techniques. Sediment cores were collected from the Elizabeth River, Virginia and were monitored over a 48 h period for PAH fluxes into uncontaminated seawater. The observed flux rates were related to solubility and octanol-water partition coefficients (Kow) of the PAHs. Flux rates for the six PAHs varied from 0.028 to 0.646 p.g/L/d on a concentration basis and 43.0 to 1,000 p~g/m2/d on an areal basis. The resulting flux rate coefficients (k2) were determined to be well correlated to solubility (R 2 = 0.82) and inversely related to Kow (R 2 = 0.75). The empirically determined sediment flux dynamics fit well with theoretical relationships that have been previously established for bioconcentration kinetics and octanol/water partitioning systems. Thus, it appears possible to predict flux rates of other hydrophobic organic chemicals from ambient sediment and water concentrations, Kow information, and the proposed empirical models.

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Section: Site Selection and Sample Collectionsupporting

confidence: 84%