Document NGaZOVaqORBJggj6a8Kd37ykg
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TRANSPORT BETWEEN ENVIRONMENTAL COMPARTMENTS (FUGACITY) TEST SUBSTANCE
Identity:
Perfluorooctanesulfonate; may also be referred to as PFOS or FC-95. (1-Octanesulfonic acid, 1,1,22,3,34,4556,67,7,8,8,8heptadecafluoro-, potassium salt, CAS #2795-39-3)
Remarks:
NA
METHOD
Test (test type): Fugacity Modeling
Method: Level |, II, and Ill EQC Computer Modeling Year completed: 1999
Remarks field for Test Conditions: Modeling conducted by Don Mackay of D. Mackay Environmental Research Limited inPeterborough, Ontario Canada. The following parameters were used:
Kaw =0* Soil/water partition coefficient (Likg) = 2.4 Sediment/water partition coefficient (Ukg)=4.8 Fish/water partition coefficient (dimensionless) = 1000 Degradation half life = 10 years
* See Air/Water Partition Coefficient Robust Summary
RESULTS
Level | results indicate the test substance, if released to water, has a tendency to remain in water (typically 80% would remain in water and 20%
would partition to soil).
Level Il results indicate the same conclusion as for Level I. Advection in water is predicted to be the dominant process for removal from the environment with degradation being very slow. The persistence in a region is estimated to be controlled by the water residence time. Level Ill results indicate:
1) Discharges toair will result in rapid deposition to soil (90%) and water (10%)
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2) `Dsiosrcpthiaorngteesntdoensociyl wiinldlitceantedsttohreemmaajionrirnetmhoevsaolil.paItths wlaoyw will be from run-off to water.
3) Ddiosmcihnaarngtersetmoovwaalteprrwoicllestsen(d9t0o%)rewmialibneinthtrhoeuwgahtaedrvaenctdivthee flow with little sorption to sediments.
CONCLUSIONS
Don Mackay writes:
"In summary, strongly ionic
`this substance' compound."
behaves
much
as
one
would
expect
ofa
"I'believe itis important to in the model and perhaps
measure refine the
real half
partition lives."
coefficients
for
inclusion
These studies are considered a "small first step".
Submitter: 3M Company, St. Paul, Minnesota, 55133
Environmental
Laboratory,
P.O.
Box
33331,
DATA QUALITY
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KSLING
OTHER
Last changed: 4/30/00
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:
re
"b. Mackay Environmental Research Limited 1864 Champlain Drive Peterborough, Ontario Canada KL 1N6 Tel (705) 740-2911 GST Reg. #R-101420263
3M991
To: Dr. Rich Purdy, 3M
Dr. JoyceSmithCooper, Battelle
Dear Rich and Joyce:
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msoudseplecdte,vbeelgoaptmheenrti.ngtheinput
data.
We
cankeepin
close
contactwith
you
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0cWofec2f4id,cisdicesadatimsmpaelrneetEhwiQagthCeerrmoobdyfea4l.fr8aucantnsodruscfioinsrghr-eawsapKtoeynryd(iodnfigzmeetronsoti,hoenalndedesnsps)airtotyif.t1i0To0nh0ec.odeefTgfhirceaidedanittmiseonLnsihikaoglnflfeoirsvsessopiawlre-twritaeitoenr ~ allsetat 10years. 1attach theLevel1, 11and ITresults.
Twhiteh12ie0v%eliLnrseosiull.ts show that PFOS has a strong tendency to remain in water, .. typically 80%
The T.eveIlT results show an identical distribution. Themajorlossis by advectiion water with
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oo
.
os
'
ornelsyivdeenrcyestliomew.degradation. The overallpersistencein a regioniscontrolledbythe water
`The Level 11 results show that:-
TFdisch(a0arigitewidllrapidly depotsosioitl (9and0 wate% r(10)%).
Idischarged to its low sorption
soil itendsto tendency.
remain
there
with
the
major
loss
beingrun-offto
water
because
of
i(f9d0i%s)c.harged towaterittendstoremaininsolutionandissubjecttoremovalbyadveetiveflow
"There is little sorptitoon sediments.
~ Tn summary, it behaves mich as one would expectofstrongly fonic compound. peTBrobiehnlagipetsvoerceiotfiminseeiumtnphdoehreatralvnfetlrityvoceslm.oesaIesntsuchrreeuptrrieeanslye.pnatr1rtw eitgiuolnoactooerifn fyfiitccild seipnmotasste sefioabrlsr eiu1nbc0sltuabsniocneuiwandhteiihgcerhamldiosadsteoid]opnaernsdistent is weakncsy iato the molecule?
Ianscmoanlclfurssitons,tewp.e arc ready and willing to do modeling at your request. Please regard thiass just
Yours truly
Don Mackay DM
--
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