Effects of structural and compositional variations of dissolved humic materials on pyrene K/sub oc/ values
Partition coefficients for the binding of pyrene to 14 different humic and fulvic acids were determined. Each of the humic materials was characterized by infrared and ultraviolet absorbance, elemental analysis, and, for four samples, /sup 13/C solid-state NMR. Partition coefficients normalized to the fraction of organic carbon in the humic material (K/sub oc/'s) varied by as much as a factor of 10 depending upon the humic material. The magnitude of the K/sub oc/ values correlated strongly with three independent measures of the degree of aromaticity in the humic material. Thus, the binding of pyrene to dissolved humic and fulvic acids is modified to a significant extent by the degree of aromaticity in the humic material. This also suggests that the structure and composition of the humic material should be considered in any attempts to model the transport and fate of hydrophobic organic pollutants in aquatic environment. 32 references, 6 figures, 2 tables.
- Research Organization:
- Univ. of New Hampshire, Durham
- OSTI ID:
- 6716747
- Journal Information:
- Environ. Sci. Technol.; (United States), Journal Name: Environ. Sci. Technol.; (United States) Vol. 21:3; ISSN ESTHA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
400101* -- Activation
Nuclear Reaction
Radiometric & Radiochemical Procedures
520200 -- Environment
Aquatic-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
AROMATICS
CARBON 13
CARBON ISOTOPES
CHEMICAL COMPOSITION
CHEMICAL REACTION KINETICS
CONDENSED AROMATICS
DATA
EVEN-ODD NUCLEI
EXPERIMENTAL DATA
FULVIC ACIDS
HUMIC ACIDS
HYDROCARBONS
INFORMATION
INFRARED SPECTRA
ISOTOPES
KINETICS
LIGHT NUCLEI
MOLECULAR STRUCTURE
NMR SPECTRA
NUCLEI
NUMERICAL DATA
ORGANIC ACIDS
ORGANIC COMPOUNDS
ORGANIC MATTER
POLLUTION
PYRENE
REACTION KINETICS
SPECTRA
STABLE ISOTOPES
WATER POLLUTION