One century sedimentary records of persistent organic pollutants (POPs) in Ngoring Lake at the source region of the Yellow River, Tibetan Plateau

Authors: Yang Ding*, China University of Geosciences, Huang Zheng, China University of Geosciences, Huanfang Huang, China University of Geosciences, Yuan Zhang, China University of Geosciences, Shihua Qi, China University of Geosciences
Topics: Environmental Science, Earth Science, China
Keywords: persistent organic pollutants (POPs), sediment core, Tibetan Plateau, long-range atmospheric transport (LRAT)
Session Type: Guided Poster
Day: 4/3/2019
Start / End Time: 4:30 PM / 6:10 PM
Room: Roosevelt 3.5, Marriott, Exhibition Level
Presentation File: No File Uploaded

Persistent organic pollutants (POPs) include a diverse range of chemical groups, such as organochlorine pesticides (OCPs), polychlorinated biphenyls (PCBs), and polycyclic aromatic hydrocarbons (PAHs). These chemicals are difficult to degrade, have a tendency to bioaccumulate through the food web, and pose a risk of causing toxic effect to human health. Owing to their persistence and semi-volatile properties, these substances can undergo long-range atmospheric transport (LRAT) and finally reach remote clean areas where they have never been produced or used. POPs are of global concern due to their ubiquitous presence and toxicity. The source region of the Yellow River (SRYR) is situated in the hinterland of Tibetan Plateau, with the average elevation exceeding 4200 m. LRAT may be the major input pathway of POPs transporting from surrounding warm and contaminated areas. SRYR is an important natural reserve for its unique and fragile ecological communities, but scarce research focused on POPs in this region. The undisturbed dated sediment core is useful for the assessment of long-term temporal trends and provenance of POPs. In our study, a sediment core was collected in Ngoring Lake at SRYR in July 2016, to reconstruct the deposition history and to evaluate POPs contamination via LRAT. Acknowledgements: This work was funded by the National Natural Science Foundation of China (Grant No. 41473095).

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