Comparing black carbon types in sequestering polybrominated diphenyl ethers (PBDEs) in sediments.
Comparing black carbon types in sequestering polybrominated diphenyl ethers (PBDEs) in sediments.
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DOI:
10.1016/j.envpol.2013.08.009
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发表时间:
2014-01
影响因子:
8.9
通讯作者:
Gan, Jay
中科院分区:
文献类型:
--
作者:
Jia, Fang;Gan, Jay
关键词:
Polybrominated diphenyl ethers (PBDEs) are widely found in sediments, especially congeners from the penta-BDE formula. Due to their strong affinity for black carbon (BC), bioavailability of PBDEs may be decreased in BC-amended sediments. In this study, we used a matrix-SPME method to measure the freely dissolved concentration (Cfree) of PBDEs as a parameter of their potential bioavailability and evaluated the differences among biochar, charcoal, and activated carbon. Activated carbon displayed a substantially greater sequestration capacity than biochar or charcoal. At 1% amendment rate in sediment with low organic carbon (OC) content (0.12%), Cfree of six PBDEs was reduced by 47.5–78.0%, 47.3–77.5%, and 94.1–98.3% with biochar, charcoal, and activated carbon, respectively, while the sequestration was more limited in sediment with high OC content (0.87%). Therefore, it is important to consider the type and properties of the BC and the sediment in BC-based remediation or mitigation.
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