Enhanced biochars can match activated carbon performance in sediments with high native bioavailability and low final porewater PCB concentrations

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dc.contributor.authorGomez-Eyles, Jose L.
dc.contributor.authorGhosh, Upal
dc.date.accessioned2018-05-04T13:16:46Z
dc.date.available2018-05-04T13:16:46Z
dc.date.issued2018
dc.description.abstractA bench scale study was conducted to evaluate the effectiveness of in situ amendments to reduce the bioavailability of pollutants in sediments from a site impacted with polychlorinated biphenyls (PCBs), polycyclic aromatic hydrocarbons (PAHs) and cadmium. The amendments tested included fine and coarse coal-based activated carbons (AC), an enhanced pinewood derived biochar (EPB), organoclay, and coke dosed at 5% of sediment dry weight. Strong reductions in total PCB porewater concentrations were observed in sediments amended with the fine AC (94.9–99.5%) and EPB (99.6–99.8%). More modest reductions were observed for the coarse AC, organoclay, and coke. Strong reductions in porewater PCB concentrations were reflected in reductions in total PCB bioaccumulation in fresh water oligochaetes for both the fine AC (91.9–96.0%) and EPB (96.1–96.3%). Total PAH porewater concentrations were also greatly reduced by the fine AC (>96.1%) and EPB (>97.8%) treatments. EPB matched or slightly outperformed the fine AC throughout the study, despite sorption data indicating a much stronger affinity of PCBs for the fine AC. Modeling EPB and fine AC effectiveness on other sediments confirmed the high effectiveness of the EPB was due to the very low final porewater concentrations and differences in the native bioavailability between sediments. However, low bulk density and poor settling characteristics make biochars difficult to apply in an aquatic setting. Neither the EPB nor the fine AC amendments were able to significantly reduce Cd bioavailability.en_US
dc.description.urihttps://www.sciencedirect.com/science/article/pii/S0045653518305496#!en_US
dc.format.extent9 pagesen_US
dc.genrejournal articlesen_US
dc.identifierdoi:10.13016/M2CZ32776
dc.identifier.citationGomez-Eyles, Jose L. and Upal Ghosh. "Enhanced biochars can match activated carbon performance in sediments with high native bioavailability and low final porewater PCB concentrations." Chemosphere 203 (July 2018), 179-187.en_US
dc.identifier.urihttp://hdl.handle.net/11603/10720
dc.language.isoen_USen_US
dc.publisherElsevieren_US
dc.relation.isAvailableAtThe University of Maryland, Baltimore County (UMBC)
dc.relation.ispartofUMBC Chemical, Biochemical & Environmental Engineering Department Collection
dc.relation.ispartofUMBC Faculty Collection
dc.rightsThis item may be protected under Title 17 of the U.S. Copyright Law. It is made available by UMBC for non-commercial research and education. For permission to publish or reproduce, please contact the author.
dc.subjectbiocharen_US
dc.subjectactivated carbonen_US
dc.subjectsorptionen_US
dc.subjectbioavailabilityen_US
dc.subjectremediationen_US
dc.titleEnhanced biochars can match activated carbon performance in sediments with high native bioavailability and low final porewater PCB concentrationsen_US
dc.typeTexten_US

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