Characterizing the parent and oxygenated polycyclic aromatic hydrocarbons in mangrove sediments of Hong Kong

Wang, Xiaowei; Yuan, Ke; Yang, Lihua; Lin, Li; Tam, N.F.Y.; Chen, Baowei; Luan, Tiangang

doi:10.1016/j.marpolbul.2015.06.033

Cited by 18 publications

(1 citation statement)

References 36 publications

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“…PAH derivatives are widespread in the environment and have been measured in atmospheric particulate matter, − industrial waste, sediments, − and soils. , However, in comparison to unsubstituted PAHs, there is limited knowledge on the environmental and biological effects of PAH derivatives. Due to their hydrophobicity, PAHs are among the most common contaminants of concern in soils at United States Environmental Protection Agency (U.S. EPA) Superfund sites and are present at many other contaminated sites not regulated under federal programs. − Potential transformation products of the oxidation of unsubstituted PAHs in the environment include OHPAHs and OPAHs.…”

Section: Introductionmentioning

confidence: 99%

Formation of PAH Derivatives and Increased Developmental Toxicity during Steam Enhanced Extraction Remediation of Creosote Contaminated Superfund Soil

Trine

Davis

Roper

et al. 2019

Environ. Sci. Technol.

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Steam enhanced extraction (SEE) is an in-situ thermal remediation technique used to remove and recover polycyclic aromatic hydrocarbons (PAHs) from contaminated soils. However, limited studies have been conducted on the formation of PAH derivatives during and after SEE of PAH contaminated soils. Creosote contaminated soil samples collected from the Wyckoff-Eagle Harbor Superfund site were remediated with laboratory scale 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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