State Key Laboratory of Environmental Geochemistry;
Institute of Geochemistry;
Chinese Academy of Sciences;
University of Chinese Academy of Sciences;
Key Laboratory for Water Quality and Conservation of the Pearl River Delta;
Ministry of Education;
School of Environmental Science and Engineering;
Guangzhou University;
Heavy; metals; Fractionation; 210pb; dating; Smelting; and; mining; activities; Sediment; cores; The; Longjiang; River;