impacted sediments from Oriole Lake

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Rainer Lohmann. 1*. , Kevyn Bollinger. 1. , John King. 1. , Mark Cantwell. 2. , Tony Caprio. 3 ... Ecology Division, 27 Tarzwell Drive, Narragansett, RI 02882, USA.
Black carbon and sorption of PAHs in natural fireimpacted sediments from Oriole Lake (CA) Rainer Lohmann1*, Kevyn Bollinger1, John King1, Mark Cantwell2, Tony Caprio3 1Graduate

School of Oceanography, University of Rhode Island, Narragansett, RI, 02882, USA 2U.S. EPA, ORD\NHEERL-Atlantic Ecology Division, 27 Tarzwell Drive, Narragansett, RI 02882, USA 3 National Park Service, Sequoia & Kings Canyon National Parks, Three Rivers, CA 93271, USA

[email protected]

 project sampling location in 2007

Downcore profiles % OC

depth (c m )

15

20

% BC 1.0

25

2.0

B C - d 13C 3.0

-26

0

0

0

5

5

5

10

10

10

15

15

15

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20

25

-28

-30

% retene

total P A Hs (ng /g dw)

O C - d 13C -32

0

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0.4

2000

0

0

5

5

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25

25

25

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Further work Establish BC record for last ~ 500 years, compare to tree record Is sorption of PAHs affected by chars? -1 -1 K d = focK oc + fSBCK SBCCwn (+ fcharK charCwnchar )? Use passive samplers to measure [PAH]porewater and Kd values Funding ACS-PRF# 46099-G2

Acknowledgements • SEKI staff for help in the field • Nate Vinhateiro, Chip Heil (URI-GSO) for field sampling • Julia Sullivan (URI-GSO) for more core extractions

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