Fate and stability of nonextractable residues of [14C]PAH in contaminated soils under environmental stress conditions
Article Abstract:
Investigation into the long-term stability of non-extractable [14C]polycyclic aromatic hydrocarbon (PAH) residues under a variety of environmental stress conditions showed that these residues can still be released from the substrate, as evidenced by the release of labelled carbon dioxide, which is consistent with the biogenic reduction of the residues. Environmental stresses such as the decrease in pH due to the addition of humic acid or the mechanical stress induced by freezing and thawing did not significantly affect the release of PAH residues from the substrate, but was found to be affected with the addition of EDTA to the substrate.
Publication Name: Environmental Science & Technology
Subject: Science and technology
ISSN: 0013-936X
Year: 1998
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Molar mass and size of Suwannee River natural organic matter using multi-angle laser light scattering
Article Abstract:
High-performance size exclusion chromatography (HPSEC) combined with multi-angle laser light scattering (MALLS) and refractive index detection are used to measure the molar mass and root mean square radius of bulk Suwannee river natural organic matter. Number-average, weight-average and z-average molar masses, moments of the rms radius distribution and polydispersity values were derived. The HPSEC/MALLS combination shows potential in elucidating the properties of humic materials in solution and the solution parameters affecting them.
Publication Name: Environmental Science & Technology
Subject: Science and technology
ISSN: 0013-936X
Year: 1997
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