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- W1997135013 abstract "Contaminated sediments can be remediated by adding carbonaceous materials (CM), e.g. activated carbons (AC). Here, we analyze published datasets from AC amendment trials to identify variation in the effectiveness of AC in reducing porewater concentrations of hydrophobic organic contaminants (HOCs). The analysis uses a model that separates the contribution of HOC sorption to AC by parameterzing the sorption contributions by amorphous organic matter and black carbon (BC). It appears that sorption to BC increased with LogK(OW), whereas sorption to AC showed a relatively narrow range of affinity properties with a median Freundlich LogK(F,)(AC) value of 7.2 (μg/kg(AC))/(μg/L)(n) (IQR = 7.0-7.5) for polychlorinated biphenyls (PCBs) and 8.6 (IQR = 8.3-8.8) for polycyclic aromatic hydrocarbons (PAHs). Estimated Freundlich exponents were n(F,)(AC) = 0.74 for PCBs and 0.82 for PAH. Sorption to AC was stronger than to BC for chemicals below LogK(OW) = 6.3-6.6. For HOC risk reduction this is favorable, because chemicals with low K(OW) show generally higher bioavailable concentrations." @default.
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- W1997135013 date "2012-02-01" @default.
- W1997135013 modified "2023-10-10" @default.
- W1997135013 title "In situ sorption of hydrophobic organic compounds to sediment amended with activated carbon" @default.
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- W1997135013 doi "https://doi.org/10.1016/j.envpol.2011.09.043" @default.
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