PMID- 17937278
OWN - NLM
STAT- MEDLINE
DCOM- 20080116
LR  - 20190715
IS  - 0013-936X (Print)
IS  - 0013-936X (Linking)
VI  - 41
IP  - 17
DP  - 2007 Sep 1
TI  - Adsorption of phenanthrene on natural snow.
PG  - 6033-8
AB  - The snowpack is a reservoir for semivolatile organic compounds (SVOCs) and, in 
      particular, for persistent organic pollutants (POPs), which are sequestered in 
      winter and released to the atmosphere or hydrosphere in the spring. Modeling 
      these processes usually assumes that SVOCs are incorporated into the snowpack by 
      adsorption to snow surfaces, but this has never been proven because the specific 
      surface area (SSA) of snow has never been measured together with snow 
      composition. Here we expose natural snow to phenanthrene vapors (one of the more 
      volatile POPs) and measure for the first time both the SSA and the chemical 
      composition of the snow. The results are consistent with an adsorption 
      equilibrium. The measured Henry's law constant is H(Phen)(T) = 2.88 x 10(22) 
      exp(-10660/7) Pa m2 mol(-1), with Tin Kelvin. The adsorption enthalpy is delta 
      H(ads) = -89 +/- 18 kJ mol(-1). We also perform molecular dynamics calculations 
      of phenanthrene adsorption to ice and obtain AHads = -85 +/- 8 kJ mol(-1), close 
      to the experimental value. Results are applied to the adsorption of phenanthrene 
      to the Arctic and subarctic snowpacks. The subarctic snowpack, with a low snow 
      area index (SAI = 1000), is a negligible reservoir of phenanthrene, butthe colder 
      Arctic snowpack, with SAI = 2500, sequesters most of the phenanthrene present in 
      the (snow + boundary layer) system.
FAU - Domine, Florent
AU  - Domine F
AD  - CNRS, Laboratoire de Glaciologie et Ggophysique de l'Environnement, BP 96, 38402 
      Saint-Martin d'Heres Cedex, France. florent@lgge.obs.ujf-grenoble.fr
FAU - Cincinelli, Alessandra
AU  - Cincinelli A
FAU - Bonnaud, Elodie
AU  - Bonnaud E
FAU - Martellini, Tania
AU  - Martellini T
FAU - Picaud, Sylvain
AU  - Picaud S
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 (Environmental Pollutants)
RN  - 0 (Phenanthrenes)
RN  - 448J8E5BST (phenanthrene)
SB  - IM
MH  - Adsorption
MH  - *Algorithms
MH  - Arctic Regions
MH  - Atmosphere
MH  - *Environmental Monitoring
MH  - Environmental Pollutants/*analysis/chemistry
MH  - Models, Theoretical
MH  - Phenanthrenes/*analysis/chemistry
MH  - Seasons
MH  - Snow/*chemistry
MH  - Volatilization
EDAT- 2007/10/17 09:00
MHDA- 2008/01/17 09:00
CRDT- 2007/10/17 09:00
PHST- 2007/10/17 09:00 [pubmed]
PHST- 2008/01/17 09:00 [medline]
PHST- 2007/10/17 09:00 [entrez]
AID - 10.1021/es0706798 [doi]
PST - ppublish
SO  - Environ Sci Technol. 2007 Sep 1;41(17):6033-8. doi: 10.1021/es0706798.