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Reverse-phase separation method for determining pollutant binding to Aldrich humic acid and dissolved organic carbon of natural waters

Journal Article · · Environ. Sci. Technol.; (United States)
DOI:https://doi.org/10.1021/es00121a010· OSTI ID:6808376
; ; ;

A reverse-phase separation technique was used to determine the binding of /sup 14/C-radiolabeled organic pollutants (benzo(a)pyrene, anthracene, biphenyl, p,p'-DDT, 2,4,5,2',4',5'-hexachlorobiphenyl, 2,5,2',5'-tetrachlorobiphenyl, and bis(2-ethylhexyl) phthalate) to humic materials in aqueous solution. The humic-bound pollutant was separated from the ''freely dissolved'' pollutant passed through, while the unbound pollutants were retained by the column. The partition coefficient (grams of pollutant bound/gram of organic carbon)/(grams of pollutant freely dissolved/milliliter) did not depend on pollutant concentration but was inversely proportional to the concentration of dissolved organic carbon (DOC) in solution. At low DOC (1-2 mg of Aldrich humic acids L/sup -1/), the partition coefficient was approximately equal to the octanol-water partition coefficient and inversely proportional to water solubility. The partition coefficient for natural waters was approximately 1 order of magnitude lower than that determined for the Aldrich humics at similar DOC concentrations. The reverse-phase separation was simple and rapid and gave results similar to dialysis techniques. 33 references.

Research Organization:
National Oceanic and Atmospheric Administration, Ann Arbor, MI
OSTI ID:
6808376
Journal Information:
Environ. Sci. Technol.; (United States), Journal Name: Environ. Sci. Technol.; (United States) Vol. 18:3; ISSN ESTHA
Country of Publication:
United States
Language:
English

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Related Subjects

520200* -- Environment
Aquatic-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
ANTHRACENE
AQUEOUS SOLUTIONS
AROMATICS
BENZOPYRENE
CARBON
CARBON 14 COMPOUNDS
CHLORINATED AROMATIC HYDROCARBONS
CONDENSED AROMATICS
DISPERSIONS
ELEMENTS
FUNCTIONS
HALOGENATED AROMATIC HYDROCARBONS
HUMIC ACIDS
HYDROCARBONS
LABELLED COMPOUNDS
MIXTURES
NONMETALS
ORGANIC ACIDS
ORGANIC CHLORINE COMPOUNDS
ORGANIC COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
PARTITION FUNCTIONS
POLLUTANTS
POLLUTION
SEPARATION PROCESSES
SOLUTES
SOLUTIONS
SORPTION
SORPTIVE PROPERTIES
SURFACE PROPERTIES
WATER POLLUTION