School of Marine Science and Engineering Qingdao Agricultural University Qingdao 266237 China;
School of Marine Science and Engineering Qingdao Agricultural University Qingdao 266237 China;
School of Marine Science and Engineering Qingdao Agricultural University Qingdao 266237 China;
School of Marine Science and Engineering Qingdao Agricultural University Qingdao 266237 China;
School of Marine Science and Engineering Qingdao Agricultural University Qingdao 266237 China;
lead contamination; Bayesian stable isotope mixing model; source quantification; surface sediment; core; Changjiang River estuary;