title: Comparing black carbon types in sequestering polybrominated diphenyl ethers (PBDEs) in sediments.
abstract: 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.
authors.affiliation: Department of Environmental Sciences, University of California, Riverside, CA 92521, USA. Electronic address: fjia001@ucr.edu.
authors.forename: Fang
authors.initials: F
authors.lastname: Jia
authors.forename: Jay
authors.initials: J
authors.lastname: Gan
mesh_terms: D000327:Adsorption; D002606:Charcoal / Q000737:chemistry*; D019015:Geologic Sediments / Q000737:chemistry*; D055768:Halogenated Diphenyl Ethers / Q000737:chemistry*; D008956:Models, Chemical; D053260:Soot / Q000737:chemistry*
chemical_list: D055768:Halogenated Diphenyl Ethers; D053260:Soot; C540010:biochar; D002606:Charcoal
keywords: Activated carbon; Biochar; Black carbon amendment; Charcoal; Polybrominated diphenyl ether; Solid phase microextraction
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