PMID- 16572790
OWN - NLM
STAT- MEDLINE
DCOM- 20060809
LR  - 20190715
IS  - 0013-936X (Print)
IS  - 0013-936X (Linking)
VI  - 40
IP  - 4
DP  - 2006 Feb 15
TI  - Freely dissolved concentrations of PAHs in soil pore water: measurements via 
      solid-phase extraction and consequences for soil tests.
PG  - 1307-13
AB  - Freely dissolved pore water concentrations are difficult to assess in complex 
      matrixes such as soils or sediments. In this study, a negligible-depletion 
      partitioning-based sampling technique was applied to measure freely dissolved 
      pore water concentrations. A poly(dimethylsiloxane) (PDMS)-coated glass fiber was 
      exposed to a slurry of a soil spiked with several PAHs at concentrations ranging 
      from 2 to 2000 mg/kg. PAH-concentrations in the PDMS coating increased linearly 
      with the total soil concentration until a certain maximum was reached. Freely 
      dissolved pore water concentrations were calculated using PDMS-water partition 
      coefficients, and the calculated maximum pore water concentrations corresponded 
      with the aqueous solubility of the tested compounds. Furthermore, the sampling 
      technique is very sensitive because it can detect freely dissolved pore water 
      concentrations in the ng/L range for the tested PAHs. Freely dissolved pore water 
      concentrations are an important parameter for the exposure of organisms in soil. 
      Saturation of the pore water with increasing soil concentrations should therefore 
      be considered in soil toxicity testing. Sorption coefficients that were 
      calculated from freely dissolved concentrations were slightly higher than 
      estimates based on octanol-water partition coefficients. These differences are 
      discussed in relation to the effects of dissolved organic matter in soil pore 
      water on the determination of sorption coefficients.
FAU - Ter Laak, Thomas L
AU  - Ter Laak TL
AD  - IRAS, Institute for Risk Assessment Sciences, Utrecht University, Yalelaan 2, 
      3584 CM Utrecht, The Netherlands. t.l.terlaak@iras.uu.nl
FAU - Agbo, Stanley O
AU  - Agbo SO
FAU - Barendregt, Arjan
AU  - Barendregt A
FAU - Hermens, Joop L M
AU  - Hermens JL
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
PL  - United States
TA  - Environ Sci Technol
JT  - Environmental science & technology
JID - 0213155
RN  - 0 (Dimethylpolysiloxanes)
RN  - 0 (Polycyclic Aromatic Hydrocarbons)
RN  - 0 (Soil Pollutants)
RN  - 0 (Water Pollutants, Chemical)
SB  - IM
MH  - Adsorption
MH  - Dimethylpolysiloxanes
MH  - Environmental Monitoring
MH  - Polycyclic Aromatic Hydrocarbons/*analysis
MH  - Porosity
MH  - Soil Pollutants/*analysis
MH  - Solubility
MH  - Water Pollutants, Chemical/analysis
EDAT- 2006/04/01 09:00
MHDA- 2006/08/10 09:00
CRDT- 2006/04/01 09:00
PHST- 2006/04/01 09:00 [pubmed]
PHST- 2006/08/10 09:00 [medline]
PHST- 2006/04/01 09:00 [entrez]
AID - 10.1021/es0514803 [doi]
PST - ppublish
SO  - Environ Sci Technol. 2006 Feb 15;40(4):1307-13. doi: 10.1021/es0514803.