Exposure of traffic police to Polycyclic aromatic hydrocarbons in Beijing, China
72
Citation
25
Reference
10
Related Paper
Citation Trend
Keywords:
Polycyclic aromatic hydrocarbon
Traffic police
Abstract Although the complexity of contaminant mixtures in sediments can confound the identification of causative agents of adverse biological response, understanding the contaminant(s) of primary concern at impacted sites is critical to sound environmental management and remediation. In the present study, a stock mixture of 18 polycyclic aromatic hydrocarbon (PAH) compounds was prepared to reflect the variety and relative proportions of PAHs measured in surface sediment samples collected from discrete areas of a historically contaminated industrial estuary. This site‐specific PAH stock mixture was spiked into nontoxic in‐system and out‐of‐system field‐collected reference sediments in dilution series spanning the range of previously measured total PAH concentrations from the region. Spiked sediments were evaluated in 10‐d Leptocheirus plumulosus tests to determine whether toxicity in laboratory‐created PAH concentrations was similar to the toxicity found in field‐collected samples with equivalent PAH concentrations. The results show that toxicity of contaminated sediments was not explained by PAH exposure, while indicating that toxicity in spiked in‐system (fine grain, high total organic carbon [TOC]) and out‐of‐system (course grain, low TOC) sediments was better explained by porewater PAH concentrations, measured using an antibody‐based biosensor that quantified 3‐ to 5‐ring PAHs, than total sediment PAH concentrations. The study demonstrates the application of site‐specific spiking experiments to evaluate sediment toxicity at sites with complex mixtures of multiple contaminant classes and the utility of the PAH biosensor for rapid sediment‐independent porewater PAH analysis. Environ Toxicol Chem 2018;37:893–902. © 2017 SETAC
Polycyclic aromatic hydrocarbon
Cite
Citations (11)
Abstract The present study examined the ability of three chemical estimation methods to predict toxicity and nontoxicity of polycyclic aromatic hydrocarbon (PAH) ‐contaminated sediment to the freshwater benthic amphipod Hyalella azteca for 192 sediment samples from 12 field sites. The first method used bulk sediment concentrations of 34 PAH compounds (PAH 34 ), and fraction of total organic carbon, coupled with equilibrium partitioning theory to predict pore‐water concentrations ( K OC method). The second method used bulk sediment PAH 34 concentrations and the fraction of anthropogenic (black carbon) and natural organic carbon coupled with literature‐based black carbon–water and organic carbon–water partition coefficients to estimate pore‐water concentrations ( K OC K BC method). The final method directly measured pore‐water concentrations (pore‐water method). The U.S. Environmental Protection Agency's hydrocarbon narcosis model was used to predict sediment toxicity for all three methods using the modeled or measured pore‐water concentration as input. The K OC method was unable to predict nontoxicity (83% of nontoxic samples were predicted to be toxic). The K OC K BC method was not able to predict toxicity (57% of toxic samples were predicted to be nontoxic) and, therefore, was not protective of the environment. The pore‐water method was able to predict toxicity (correctly predicted 100% of the toxic samples were toxic) and nontoxicity (correctly predicted 71% of the nontoxic samples were nontoxic). This analysis clearly shows that direct pore‐water measurement is the most accurate chemical method currently available to estimate PAH‐contaminated sediment toxicity to H. azteca . Environ. Toxicol. Chem. 2010;29:1545–1550. © 2010 SETAC
Hyalella azteca
Polycyclic aromatic hydrocarbon
Cite
Citations (25)