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FORMATION OF PAH DERIVATIVES AND INCREASED DEVELOPMENTAL TOXICITY DURING STEAM ENHANCED EXTRACTION REMEDIATION OF CREOSOTE CONTAMINATED SUPERFUND SOIL
Trine, L.S.D., E.L. Davis, C. Roper, L. Truong, R.L. Tanguay, and S.L.M. Simonich.
Environmental Science & Technology 53(8):4460-4469(2019)
Creosote-contaminated soil samples collected from the Wyckoff-Eagle Harbor Superfund site were remediated with laboratory-scale steam enhanced extraction (SEE). The samples were quantified for unsubstituted PAHs and their derivatives and assessed for developmental toxicity, pre- and post-SEE. Following SEE, unsubstituted PAH concentrations decreased, while oxygenated PAH concentrations increased in soil and aqueous extracts. Differences in developmental toxicity were also measured and linked to the formation of PAH derivatives. Additive toxicity was measured when comparing unfractionated extracts to fractionated extracts in pre- and post-SEE samples. SEE is effective in removing unsubstituted PAHs from contaminated soil, but other, potentially more toxic, PAH derivatives are formed.
Environmental Science & Technology 53(8):4460-4469(2019)
Creosote-contaminated soil samples collected from the Wyckoff-Eagle Harbor Superfund site were remediated with laboratory-scale steam enhanced extraction (SEE). The samples were quantified for unsubstituted PAHs and their derivatives and assessed for developmental toxicity, pre- and post-SEE. Following SEE, unsubstituted PAH concentrations decreased, while oxygenated PAH concentrations increased in soil and aqueous extracts. Differences in developmental toxicity were also measured and linked to the formation of PAH derivatives. Additive toxicity was measured when comparing unfractionated extracts to fractionated extracts in pre- and post-SEE samples. SEE is effective in removing unsubstituted PAHs from contaminated soil, but other, potentially more toxic, PAH derivatives are formed.
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