Staci Capozzi, Ph.D. (Maryland) coauthored a paper entitled "Polychlorinated biphenyls in stormwater sediments: Relationships with land use and particle characteristics" published in the Journal Water Research on July 16, 2019.
Staci's coauthors were Siqi Cao, Birthe V. Kjellerup, and Allen P. Davis.
Staci is a Senior Staff Scientist focused on data mining, source apportionment, polychlorinated biphenyls (PCBs), and the bioremediation of PCBs and halogenated solvents in subsurface systems. Staci has applied her skills to apportion PCBs found in wastewater in Washington, D.C. to various potential sources and recently presented a portion of her research results at an international PCB conference in Poland.
Water Research publishes refereed, original research papers on all aspects of the science and technology of water quality and its management worldwide. The journal publishes papers related to water quality monitoring and assessment based on chemical, physical, and biological methods; studies on inland, tidal, coastal and/or urban waters, including surface and ground waters, as well as point and non-point sources of pollution.
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Polychlorinated biphenyls (PCBs) are classified as persistent organic pollutants (POPs). Concentrations of 209 PCB congeners as well as profiles of the ten homologues were determined in stormwater sediments collected from various (primarily roadway) sites with different land use. The total PCB concentrations ranged from 8.3 to 57.4 ng/g dry weight (dw), with a mean value of 29.2 ng/g dw. PCB concentrations varied with nearby land use. Higher stormwater sediment PCB concentrations were found in dense urban areas (average: 39.8 ± 10.5 ng/g) and residential areas (average: 35.3 ± 6.2 ng/g) compared to highways passing through greenspace (average: 18.0 ± 0.4 ng/g). The number of chlorines per biphenyl ranged from 3.63 to 5.39 and the toxic equivalency (TEQs) of the PCBs were between 1.5 and 18.0 pg/g at all sites. A non-Aroclor congener, PCB 11, was detected in all samples and was dominant at two sites. PCBs were sorbed to smaller stormwater particulate matter (≤75 μm) at higher concentrations compared to larger particles (>75 μm). PCB sorption tended to increase with the total organic carbon (TOC) of the particulate matter in the sediment samples. However, greater PCB mass (almost 80%) was present in the larger particles. Information on sediment PCB concentrations from different land uses, along with stormwater particulate matter data can allow the estimation of PCB loads and load reductions using stormwater control measures.
Learn more about the article: https://www.sciencedirect.com/science/article/abs/pii/S0043135419306311?via%3Dihub#!
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Learn more about Staci at: https://www.linkedin.com/in/staci-capozzi-ph-d-1408a8a4/