Influence of natural organic matter on the solid-phase extraction of organic micropollutants Application to the water-extract from highly contaminated river sediment

In freshwater systems, organic micropollutants are bound to natural organic matter (NOM), which is responsible for a decrease in their recoveries by solid-phase extraction (SPE). This "negative effect" has been investigated for the SPE of polycyclic aromatic hydrocarbons (PAHs), oxygenated...

Full description

Saved in:
Bibliographic Details
Published in:Journal of Chromatography A 2007-11, Vol.1173 (1-2), p.1-9
Main Authors: JEANNEAU, L, FAURE, P, JARDE, E
Format: Article
Language:English
Subjects:
Analysis methods
Analytical chemistry
Applied sciences
Chemistry
Chromatographic methods and physical methods associated with chromatography
Earth Sciences
Exact sciences and technology
Fresh Water - chemistry
Gas chromatographic methods
Geochemistry
Geologic Sediments - chemistry
Hydrology
Models, Theoretical
Pollution
Polycyclic Aromatic Hydrocarbons - analysis
Polycyclic Aromatic Hydrocarbons - isolation & purification
Rivers
Sciences of the Universe
Soil and sediments pollution
Solid Phase Extraction - methods
Surface-Active Agents - analysis
Surface-Active Agents - isolation & purification
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:In freshwater systems, organic micropollutants are bound to natural organic matter (NOM), which is responsible for a decrease in their recoveries by solid-phase extraction (SPE). This "negative effect" has been investigated for the SPE of polycyclic aromatic hydrocarbons (PAHs), oxygenated PAHs, nitrated PAHs and n-alkanes from salt water using Aldrich humic acid as a model of NOM. The effect has been partially obviated by the addition of isopropanol as a surfactant. The SPE protocol, developed with isopropanol, has been applied to the water-extract of a highly contaminated sediment. The water-extract has been size fractionated by cross-flow ultrafiltration into particulate (PM), colloidal (CM) and truly dissolved matter (tDM). Organic extracts from SPE experiments have been analyzed by gas chromatography-mass spectrometry. The major classes of molecules are heteroaromatic PAHs and PAHs. Those molecules are mainly bound to the tDM, which highlights: (1) the competition between organic micropollutants and natural organic molecules for available sorption sites and (2) the toxicological hazard linked to the mobilization of sediments highly contaminated by both industrial and urban activities.
ISSN:0021-9673
1873-3778
DOI:10.1016/j.chroma.2007.09.080