Spatiotemporal distribution and particle–water partitioning of polycyclic aromatic hydrocarbons in Bohai Sea, China

Chen, Chongtai; Lin, Tian; Sun, Xu; Wu, Zilan; Tang, Jianhui

doi:10.1016/j.watres.2023.120440

Cited by 11 publications

(2 citation statements)

References 59 publications

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“…The water–particle partitioning coefficient ( K P ) has been widely used to evaluate the partition behavior of PAHs in aquatic environments (detailed calculation method in Text S1). ,− Significantly positive correlations were observed between K P and octanol–water partition coefficients ( K OW ) for PAHs ( p < 0.01) and A-PAHs ( p < 0.05, Figure ). Many studies found similar water–particle partition behavior for the EPA priority control PAHs. ,, For A-PAHs, the introduction of alkyl groups simultaneously increases K OW and octanol-air partition coefficients ( K OA ), resulting in higher partition into a more hydrophobic octanol phase (Table S2). Thus, the water–particle partitioning of both PAHs and A-PAHs was influenced by the hydrophobic interaction.…”

Section: Resultsmentioning

confidence: 99%

“…Many studies found similar water−particle partition behavior for the EPA priority control PAHs. 48,50,51 For A-PAHs, the introduction of alkyl groups simultaneously increases K OW and octanol-air partition coefficients (K OA ), resulting in higher partition into a more hydrophobic octanol phase (Table S2). Thus, the water−particle partitioning of both PAHs and A-PAHs was influenced by the hydrophobic interaction.…”

Section: Occurrence Of Pahs and Their Derivatives In Thementioning

confidence: 99%

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Chemodynamics of Polycyclic Aromatic Hydrocarbons and Their Alkylated and Nitrated Derivatives in the Yellow Sea and East China Sea

Zhang,

Ma,

Cai

et al. 2023

Environ. Sci. Technol.

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The occurrence of continuously released polycyclic aromatic hydrocarbons (PAHs) in marginal seas is regulated by hydrological and biogeochemical processes; however, scarce knowledge is about their derivatives in marine environments. In this study, the dissolved and particulate PAHs and their alkylated/nitrated derivatives (A-PAHs/N-PAHs) in surface seawater of the southwestern Yellow Sea (YS) and northwestern East China Sea (ECS) during September 2022 were comprehensively discussed. Results confirm higher levels of Σ 26 PAHs (9.3−70 ng/L) and Σ 43 A-PAHs (13−76 ng/ L) than Σ 20 N-PAHs (0.80−6.6 ng/L). The spatial heterogeneity of contaminants was regulated by substantial riverine runoff and ocean currents. Lagrangian Coherent Structure analysis further revealed the existence of a transport barrier at the shelf break of the southwestern YS where contaminants hardly crossed and tended to accumulate. The relationship between dissolved compounds and chlorophyll a indicated both biodegradation and the biological pump contributed to the depletion of PAHs and A-PAHs from surface seawater while the biological pump was the major driver for N-PAHs, despite their complicated water−particle partition behavior due to variations in physicochemical properties in the presence of nitro groups. Source identification demonstrated that pyrogenic and petrogenic sources dominated the YS and ECS, respectively, while photochemical transformations appeared more active in the YS.

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