Comprehensive insights into the occurrence, source, distribution and risk assessment of polycyclic aromatic hydrocarbons in a large drinking reservoir system

The resource, environment, and ecological value of drinking reservoirs have received widespread concerns due to the pollution of persistent organic pollutants such as polycyclic aromatic hydrocarbons (PAHs). Therefore, we comprehensively studied the occurrence, source, distribution, and risk assessm...

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Published in:	Environmental science and pollution research international 2022, Vol.29 (5), p.6449-6462
Main Authors:	Xu, Xiangyang, Cui, Kangping, Chen, Yihan, Chen, Xing, Guo, Zhi, Chen, Hongjie, Deng, Guangwei, He, Yiliang
Format:	Article
Language:	eng
Subjects:	Aquatic Pollution Atmospheric Protection/Air Quality Control/Air Pollution Biomass burning China Drinking Earth and Environmental Science Ecotoxicology Environment Environmental Chemistry Environmental Health Environmental Monitoring Geologic Sediments Naphthalene Nitrogen dioxide Persistent organic pollutants Phenanthrene Pollutants Polycyclic aromatic hydrocarbons Polycyclic Aromatic Hydrocarbons - analysis Pore water Redundancy Research Article Reservoirs Risk Assessment Rivers Sediments Soils Waste Water Technology Water Management Water Pollutants, Chemical - analysis Water Pollution Control
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Summary:	The resource, environment, and ecological value of drinking reservoirs have received widespread concerns due to the pollution of persistent organic pollutants such as polycyclic aromatic hydrocarbons (PAHs). Therefore, we comprehensively studied the occurrence, source, distribution, and risk assessment of representative PAHs in Fengshuba Reservoir (FSBR) (large drinking reservoir, China). The total concentrations of 16 USEPA PAHs in the water phase, porewater phase, sediment phase, and soil phase were in ranges of 109.72–393.19 ng/L, 5.75–35.15 μg/L, 364.4–743.71 μg/kg, and 367.81–639.89 μg/kg, respectively. The naphthalene (Nap) was the dominant PAHs in the water phase, while it was Nap and phenanthrene (Phe) in porewater, sediment, and soil phase. The main sources of PAHs in FSBR were biomass combustion. Redundancy analysis indicated that the NTU, NO 2 - , NH 4 + , Chl-α, and IC were the dominant factors influencing the PAH distribution in water phase, and the PAHs in sediment phase was affected by T and NO 3 - . Pseudo-partitioning coefficients indicated that the PAHs in the porewater phase were more likely to migrate to the sediment phase. Risk assessment indicated that the PAHs both in the water and sediment phases were generally in a low-risk state, while the PAHs in the soil phase were in a moderate-risk state, and the Nap was in a high-risk state, and exposure to the PAHs in FSBR through drinking and skin exposure had little impact on consumers’ health. In summary, Nap could be used as a key indicator to evaluate the existence and potential risk of PAHs in FSBR.
ISSN:	0944-1344 1614-7499