School of Marine Sciences China University of Geosciences Beijing 100083 China;
School of Marine Sciences China University of Geosciences Beijing 100083 China;
School of Marine Sciences China University of Geosciences Beijing 100083 China;
Pingdingshan Uinversity Pingdingshan 467000 China;
School of Marine Sciences China University of Geosciences Beijing 100083 China;
Shuangtaizi River estuary; sediment core; heavy metals; pollution;