Historical evolution of polycyclic aromatic hydrocarbon pollution in Chaihe Reservoir from 1863 to 2018

Pollution from polycyclic aromatic hydrocarbons (PAHs) spreads and changes worldwide. The pollution evolution in the regional water environment evolves in response to multiple factors, requiring considerable attention. PAH heterogeneity in the sediment core from Chaihe Reservoir was investigated to...

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Bibliographic Details
Published in:Journal of environmental management 2023-02, Vol.328, p.116944, Article 116944
Main Authors: Sun, Wenxian, Niu, Xiaoyin, Yin, Xianwei, Duan, Zhenhao, Xing, Liqi, Liu, Aiju, Ma, Yanfei, Gao, Peiling
Format: Article
Language:English
Subjects:
Chaihe Reservoir
China
Coal - analysis
Environmental Monitoring - methods
Geologic Sediments
PAHs
Polycyclic Aromatic Hydrocarbons
Risk assessment
Sediment
Source apportionment
Water Pollutants, Chemical - analysis
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Summary:Pollution from polycyclic aromatic hydrocarbons (PAHs) spreads and changes worldwide. The pollution evolution in the regional water environment evolves in response to multiple factors, requiring considerable attention. PAH heterogeneity in the sediment core from Chaihe Reservoir was investigated to indicate dynamic changes in PAH pollution levels and sources and propose recommendations for controlling PAHs. Dynamic PAH patterns showed that the overall decline in PAH pollution was in association with local anthropogenic activities, temperature, and precipitation over the period 1863–2018. Nevertheless, coal, oil, and natural gas consumptions still played significant roles in transferring PAHs to the reservoir. Meanwhile, there were dominant local origins, including grass, wood, and coal combustion. The results highlight that the joint action of natural and anthropogenic interventions mitigated PAH pollution in the reservoir. Promoting improved fuels, new energy vehicles, and cleaner energy may further lower PAH pollution. •A 155-year sedimentary record of PAH pollution in the Chaihe Reservoir was studied.•Anthropogenic activities can cause PAHs to accumulate in the reservoir.•PAH accumulation in the reservoir was weakened by natural factors.•Sedimentary records of PAHs reflected the migration distance of PAH pollution.•Coal, petroleum, natural gas, and biomass consumptions were primary sources.
ISSN:0301-4797
1095-8630
DOI:10.1016/j.jenvman.2022.116944