The most common ways to remediate polycyclic aromatic hydrocarbon (PAH) contamination at Superfund sites include chemical oxidation, bioremediation and thermal treatment. All of these remediation strategies have the potential to form hazardous oxy- and hydroxy-PAH breakdown products by oxidizing parent PAH. However, the peer-reviewed literature contains few studies of the formation of these chemicals during PAH remediation, for at least three reasons: the inability to predict which oxy- and hydroxy-PAHs will form in complex environmental mixtures, the complexity of the chemical analysis of oxy- and hydroxy-PAHs, and the historical lack of oxy- and hydroxy-PAH standards. As a result, regulatory agencies and researchers monitor the degradation of parent PAH during remediation of Superfund sites, but not the formation of hazardous PAH breakdown products. We hypothesize that parent PAHs transform into more persistent, water soluble, bioavailable, and toxic PAH breakdown products during the remediation of PAH-contaminated Superfund sites. Our first specific aim is to predict and measure PAH breakdown products formed from the oxidation of parent PAHs on the basis of computational modeling, controlled laboratory experiments, and two-dimensional gas chromatography equipped with time-of-flight mass spectrometry (GCxGC/ToF-MS). Our second specific aim is to measure PAH breakdown products directly in soils and sediments from former wood treatment Superfund sites, pre- and post-remediation, by GCxGC/ToF-MS. Our third specific aim is to determine which PAH remediation technologies minimize the formation of hazardous PAH breakdown products and assess the potential risk. We plan to measure soil and sediment samples from pilot scale remediation testing and determine if the parent, oxy-, and hydroxy-PAH concentrations increase or decrease with testing. We will determine which remediation conditions and soil and sediment properties affect the formation of hazardous PAH breakdown products. We will also collaborate with the Research Translation Core to provide guidance to Superfund managers regarding the human risk assessment of hazardous PAH breakdown products and appropriate remediation strategies to minimize their formation.
Project 5 is directly relevant to Superfund because it involves the study of PAH remediation strategies at Superfund sites and the potential for hazardous PAH breakdown products, including oxy and hydroxy-PAHs, to form. We will predict and measure hazardous PAH breakdown products at Superfund sites and provide guidance to Superfund managers on which PAH remediation strategies minimize the formation of hazardous PAH breakdown products.
|Garcia, Gloria R; Goodale, Britton C; Wiley, Michelle W et al. (2017) In Vivo Characterization of an AHR-Dependent Long Noncoding RNA Required for Proper Sox9b Expression. Mol Pharmacol 91:609-619|
|Donald, Carey E; Anderson, Kim A (2017) Assessing soil-air partitioning of PAHs and PCBs with a new fugacity passive sampler. Sci Total Environ 596-597:293-302|
|Wittwehr, Clemens; Aladjov, Hristo; Ankley, Gerald et al. (2017) How Adverse Outcome Pathways Can Aid the Development and Use of Computational Prediction Models for Regulatory Toxicology. Toxicol Sci 155:326-336|
|Madeen, Erin P; Williams, David E (2017) Environmental PAH exposure and male idiopathic infertility: a review on early life exposures and adult diagnosis. Rev Environ Health 32:73-81|
|Shrivastava, Manish; Lou, Silja; Zelenyuk, Alla et al. (2017) Global long-range transport and lung cancer risk from polycyclic aromatic hydrocarbons shielded by coatings of organic aerosol. Proc Natl Acad Sci U S A 114:1246-1251|
|Geier, Mitra C; Chlebowski, Anna C; Truong, Lisa et al. (2017) Comparative developmental toxicity of a comprehensive suite of polycyclic aromatic hydrocarbons. Arch Toxicol :|
|Knecht, Andrea L; Truong, Lisa; Simonich, Michael T et al. (2017) Developmental benzo[a]pyrene (B[a]P) exposure impacts larval behavior and impairs adult learning in zebrafish. Neurotoxicol Teratol 59:27-34|
|Zhang, Guozhu; Truong, Lisa; Tanguay, Robert L et al. (2017) A New Statistical Approach to Characterize Chemical-Elicited Behavioral Effects in High-Throughput Studies Using Zebrafish. PLoS One 12:e0169408|
|Madeen, Erin P; Löhr, Christiane V; You, Hannah et al. (2017) Dibenzo[def,p]chrysene transplacental carcinogenesis in wild-type, Cyp1b1 knockout, and CYP1B1 humanized mice. Mol Carcinog 56:163-171|
|Knecht, Andrea L; Truong, Lisa; Marvel, Skylar W et al. (2017) Transgenerational inheritance of neurobehavioral and physiological deficits from developmental exposure to benzo[a]pyrene in zebrafish. Toxicol Appl Pharmacol 329:148-157|
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