PMID- 23177006
OWN - NLM
STAT- MEDLINE
DCOM- 20140328
LR  - 20130925
IS  - 1879-1298 (Electronic)
IS  - 0045-6535 (Linking)
VI  - 93
IP  - 5
DP  - 2013 Oct
TI  - Chemical fate, latitudinal distribution and long-range transport of cyclic 
      volatile methylsiloxanes in the global environment: a modeling assessment.
PG  - 835-43
LID - S0045-6535(12)01295-7 [pii]
LID - 10.1016/j.chemosphere.2012.10.056 [doi]
AB  - Cyclic volatile methylsiloxanes (cVMS) such as octamethycyclotetrasiloxane (D4), 
      decamethycyclopentasiloxane (D5), and dodecamethylcyclohexasiloxane (D6) are 
      widely used as intermediates in the synthesis of high-molecular weight silicone 
      polymers or as ingredients in the formulation of personal care products. The 
      global environmental fate, latitudinal distribution, and long range transport of 
      those cVMS were analyzed by two multimedia chemical fate models using the best 
      available physicochemical properties as inputs and known persistent organic 
      pollutants (POPs) and highly persistent volatile organic chemicals ("fliers") as 
      reference. The global transport and accumulation characteristics of cVMS differ 
      from those of typical POPs in three significant ways. First, a large fraction of 
      the released cVMS tends to become airborne and is removed from the global 
      environment by degradation in air, whereas known POPs have a tendency to be 
      distributed and persistent in all media. Secondly, although cVMS can travel a 
      substantial distance in the atmosphere, they have little potential for deposition 
      to surface media in remote regions. This contrasts with a deposition potential of 
      known POPs that exceeds that of cVMS by 4-5 orders of magnitude. Thirdly, cVMS 
      have short global residence times with the majority of the global mass removed 
      within 3months of the end of release. Global residence times of POPs on the other 
      hand are in years. The persistent fliers resemble the cVMS with respect to the 
      first two attributes, but their global residence times are more like those of the 
      POPs.
CI  - Copyright (c) 2012 Elsevier Ltd. All rights reserved.
FAU - Xu, Shihe
AU  - Xu S
AD  - Health and Environmental Science, Dow Corning Corporation, Midland, MI 48686, 
      USA. Electronic address: shihe.xu@dowcorning.com.
FAU - Wania, Frank
AU  - Wania F
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
DEP - 20121122
PL  - England
TA  - Chemosphere
JT  - Chemosphere
JID - 0320657
RN  - 0 (Environmental Pollutants)
RN  - 0 (Siloxanes)
SB  - IM
MH  - Atmosphere/chemistry
MH  - *Environmental Monitoring
MH  - Environmental Pollutants/*analysis
MH  - *Models, Chemical
MH  - Siloxanes/*analysis
OTO - NOTNLM
OT  - Deposition potential
OT  - Half-lives in the global environment
OT  - Latitudinal distribution of environmental contaminants
OT  - Long-range transport potential
OT  - Multimedia environmental modeling
OT  - POPs
OT  - Volatile methylsiloxanes
EDAT- 2012/11/28 06:00
MHDA- 2014/03/29 06:00
CRDT- 2012/11/27 06:00
PHST- 2012/11/27 06:00 [entrez]
PHST- 2012/11/28 06:00 [pubmed]
PHST- 2014/03/29 06:00 [medline]
AID - S0045-6535(12)01295-7 [pii]
AID - 10.1016/j.chemosphere.2012.10.056 [doi]
PST - ppublish
SO  - Chemosphere. 2013 Oct;93(5):835-43. doi: 10.1016/j.chemosphere.2012.10.056. Epub 
      2012 Nov 22.