A SPME-based passive sampler for improving sediment quality assessment of hydrophobic organic contaminants (HOCs) K. Maruya , D. Tsukada, W. Lao , D. Greenstein, S. Bay Southern California Coastal Water Research Project Costa Mesa, CA USA Z. Yang, E. Zeng Guangzhou Institute of Geochemistry Guangzhou, China
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A SPME-based passive sampler for improving sediment quality assessment of hydrophobic organic contaminants (HOCs)
K. Maruya, D. Tsukada, W. Lao , D. Greenstein, S. BaySouthern California Coastal Water Research Project
Costa Mesa, CA USA
Z. Yang, E. ZengGuangzhou Institute of Geochemistry
Guangzhou, China
0
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100
-1 0 1 2 3
log Pb
SedQ
ual "
LOE"
%MORTALITYBRI
0
20
40
60
80
100
0 1 2 3 4 5
log ΣHPAH
SedQ
ual "
LOE"
%MortalityBRI
Statewide (CA) Condition
Likely Impacted
17%
ClearlyImpacted
3%Unimpacted
10%Likely Unimpacted
7%
Possibly Impacted63%
Inconclusive0.3%
Koc = Cs,oc/Cw
TISSUE(LIPID)
AQUEOUS(POREWATER)
BCF = Cb/CwBSAF = Cb/Cs
KdocSOLID(SEDIMENT)
O
O
Koc ( ~ Kow) >> 103 ---> Cw << 1 mg/L
Can we quantify the bioavailable fraction of HOCs (at ultratrace levels)?
Housing:
11 x 1 cm o.d. (1 mm) Cu tube
Interior “cavity” volume: 4.9 cm3
GF/F (0.7 μm eff pore dia.)
270 mesh 316 stainless screen
SPME Fiber:
Length: 1 cm
PDMS coating:
7, 30 or 100 μm
Reusable
Reinjectable
Comm avail.
(Supelco)
Model HOCsCsat log K ow log K f, 7 log K f, 100 K f,7 / K f,100 MDL100