Main Title |
Fluorescent Polycyclic Aromatic Hydrocarbons as Probes for Studying the Impact of Colloids on Pollutant Transport in Groundwater. |
Author |
Backhus, D. A. ;
Gschwend., P. M. ;
|
CORP Author |
Massachusetts Inst. of Tech., Cambridge. Ralph M. Parsons Lab.;Robert S. Kerr Environmental Research Lab., Ada, OK.;Department of Energy, Washington, DC. |
Publisher |
c1990 |
Year Published |
1990 |
Report Number |
EPA-R-812466, DE-FG02-86ER60413; |
Stock Number |
PB91-117457 |
Additional Subjects |
Humic acids ;
Sewage ;
Colloids ;
Ground water ;
Fluorescence ;
Probes ;
Aromatic polycyclic hydrocarbons ;
Extinguishing ;
Water pollution ;
Field tests ;
Reprints ;
Cape Cod(Massachusetts) ;
Environmental transport
|
Holdings |
Library |
Call Number |
Additional Info |
Location |
Last Modified |
Checkout Status |
NTIS |
PB91-117457 |
Some EPA libraries have a fiche copy filed under the call number shown. |
|
07/26/2022 |
|
Collation |
12p |
Abstract |
A fluorescence-quenching method was developed to assess the hydrophobic organic pollutant binding potential of organic colloids (OC) in unaltered natural waters. This method allows direct assessment of the importance of OC-enhanced pollutant transport for environmental samples under in situ water chemistry conditions, without requiring the isolation of OC or separation of equilibrated phases; testing of chemicals that suffer substantial wall losses from aqueous solutions; and examination of unstable water samples such as anoxic samples. The experiments show that some OC (Aldrich humic acids) fully quench OC-associated perylene fluorescence, but others (bovine serum albumin) do not. This implies that fluorescence-quenching results collected for a single (OC) or over a limited (OC) range provide only a lower limit estimate of the potential for OC association. Tests with groundwater, recharged with secondarily treated sewage and containing OC at concentrations of about 1 mg of C/L, showed temporal variation in the ability of OC present to quench or bind perylene. (Copyright (c) by the American Chemical Society, 1990.) |