Interactions between polycyclic aromatic hydrocarbons and natural aquatic humic substances. Contact time relationship

Johnsen, S. E. J.

doi:10.1016/0048-9697(87)90218-x

Cited by 35 publications

(19 citation statements)

References 17 publications

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“…2), illustrating the effects of aging on availability of PAHs. These results agree with an earlier work which found that the availability of PAHs decreased with length of aging in sterile soil, sediment, and dissolved organic matter (DOM) [30][31][32]. In those studies, the time scale was comparable to that used in the present study.…”

Section: Effects Of Aging and Chemical Property On Desorptionsupporting

confidence: 93%

Aging effects on sorption–desorption behaviors of PAHs in different natural organic matters

Wang

Chen

et al. 2012

Journal of Colloid and Interface Science

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a b s t r a c tThe aging effects of sorption-desorption of two polycyclic aromatic hydrocarbons (PAHs), that is, phenanthrene and chrysene on different natural organic matters (NOMs), that is, humic acid, fulvic acid, and humins of different sources were studied. Both organic carbon-normalized distribution coefficients (K oc ) and the reversible desorption fractions (f rd ) were evaluated. Results showed that aging effects were both sorbent and sorbate specific. With increasing aging duration, K oc s of phenanthrene on humins increased, whereas K oc s of chrysene did not change significantly. Significant f rd declinations over aging times were observed for all the NOMs, which demonstrated the effects of aging on availability of PAHs. Furthermore, the f rd was not only positively correlated with the atomic O/C ratio of NOMs, which represent the geological maturity of NOMs, but also varied with the property of sorbates. We conclude that aging effects of HOCs on NOMs should be a case-specific process and the desorption reversibility depends on the structure and characteristics of both NOMs and sorbates.

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Section: Effects Of Aging and Chemical Property On Desorptionsupporting

confidence: 93%

Aging effects on sorption–desorption behaviors of PAHs in different natural organic matters

Wang

Chen

et al. 2012

Journal of Colloid and Interface Science

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“…Presented at Bataton Symposium on High-Performance Separation Methods, Sidfok, Hungary, September [1][2][3]1999 acids, which are soluble only at pH > 7, and humin, which is insoluble. Humic acids (HA) have Mr up to 30000 Da [ 1]; their chemical structure consists of aromatic rings interconnected by long alkyl chains and with many polar functional groups, for example carboxylic, phenolic, alcoholic, and amino groups.…”

Section: Introductionmentioning

confidence: 99%

The interaction of triazine herbicides with humic acids

Prosen

Zupančič‐Kralj

2000

Chromatographia

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“…Therefore it was suggested that complexation may be activated due to the self-coiling and aggregation of dissolved HS molecules. The conformation changes could result in slower diffusion to specific sorption sites, and a fraction of solute may be trapped [8,12,13].…”

Section: Desorption Of the Bound Fractionmentioning

confidence: 99%

“…However, numerous findings were reported recently that our fundamental understanding of sorption and desorption might be in need of reexamination [7]. For instance, a few studies showed that the HS-water system exhibits a complex behavior and a small fraction of the sorbed contaminant remained unexpectedly in HS, just as often observed in sediment-water systems [8]. In Schlebaum et al's study, the results showed that part of pentachlorobenzene sorbed to a dissolved humic acid (HA) resisted desorption.…”

Section: Introductionmentioning

confidence: 99%

Assessing desorption resistance of PAHs in dissolved humic substances by membrane-based passive samplers

Chen

Wang

2010

Journal of Colloid and Interface Science

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a b s t r a c tBinding of hydrophobic organic compounds (HOCs) to humic substances (HS) has significant influence on their fate and bioavailability in an aquatic environment, yet very little is known on the desorption behavior of HOCs in dissolved HS. In this study, triolein-embedded cellulose acetate membranes (TECAMs) were used as passive samplers in dissolved HS-containing solutions to extract the free polycyclic aromatic hydrocarbons (PAHs). The partitioning coefficients (K OC ) of PAHs in dissolved HS from different sources were determined. Then the rapidly desorbable fractions (f rd ) of HOCs in dissolved HS were quantified by a quasi-equilibrium model. Results show that the magnitude of K OC of PAHs correlated strongly with the O/C atomic ratio and molecular weight of HS. The PAHs with lower K OW values desorbed almost reversibly from an aquatic fulvic acid, a sediment humic acid (HA), a lignite HA, and Aldrich HA. However, for strongly hydrophobic chrysene binding to the lignite HA, some extent of desorption resistance was found and attributed to sorption hysteresis as well as steric hindrance. The present study illustrated that the quality of HS and the property of solute may play key roles in determining the desorption reversibility.

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Interactions between polycyclic aromatic hydrocarbons and natural aquatic humic substances. Contact time relationship

Cited by 35 publications

References 17 publications

Aging effects on sorption–desorption behaviors of PAHs in different natural organic matters

Aging effects on sorption–desorption behaviors of PAHs in different natural organic matters

The interaction of triazine herbicides with humic acids

Assessing desorption resistance of PAHs in dissolved humic substances by membrane-based passive samplers

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