Annual flux estimation and source apportionment of PCBs and PBDEs in the middle reach of Yangtze River, China.

Yile Wang, Yuying Feng, Yulin Chen, Tianyi Li, Yang Tan, Yongfei Ma, Zulin Zhang

The Science of the total environment 2023 Aug 10

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This work is the first time to investigate the annual flux, spatiotemporal changes and sources of PCBs and PBDEs in water and sediment from the middle reach of Yangtze River (Wuhan, China), which was particularly based on the monthly monitoring data in a one-year-round study. The concentrations of PCBs and PBDEs in water were PBDEs of transferring from water to sediment. PMF analysis showed that the possible sources of PCBs included fuel emissions (36.7 %), e-waste (26.4 %), paint and coatings (13.6 %), Aorclor1248 (12.4 %) and waste/biodegradation processes (10.8 %), while the potential sources for PBDEs were debromination of highly brominated PBDEs (56.1 %), industrial Penta-BDEs (16.6 %), e-waste (14.1 %) and atmospheric deposition (13.3 %). The annual fluxes were estimated for PCBs and PBDEs with 578 kg and 1360 kg, respectively. The results of risk assessment revealed that PCBs and PBDEs were at low or minimal risks in the study area, although the potential threat to the ecosystem should not be ignored due to their bio-accumulative effect and high toxicity particularly when these compounds are transferred through the food chain. Copyright © 2023 Elsevier B.V. All rights reserved.

Citation

Yile Wang, Yuying Feng, Yulin Chen, Tianyi Li, Yang Tan, Yongfei Ma, Zulin Zhang. Annual flux estimation and source apportionment of PCBs and PBDEs in the middle reach of Yangtze River, China. The Science of the total environment. 2023 Aug 10;885:163772