文献类型：期刊文献

英文题名：Hydrodynamic controls on the spatial distribution of heavy metals in surface sediments of the Beibu Gulf, China

作者：Wu, Liyuan[1,2];Huang, Chao[1,3,4];Xie, Yuhan[5];Huang, Xin[1,3,4];Huang, Jiang[1];Xu, Jin[6];Chen, Fajin[1,3,4];Chen, Chunqing[1];Cao, Hansheng[1,3,4];Deng, Wenfeng[5]

机构：[1]Guangdong Ocean Univ, Coll Ocean & Meteorol, Lab Coastal Ocean Variat & Disaster Predict, Zhanjiang 524088, Peoples R China;[2]Chinese Acad Sci, State Key Lab Trop Oceanog, South China Sea Inst Oceanol, Guangzhou 511458, Peoples R China;[3]Guangdong Ocean Univ, Dept Educ Guangdong Prov, Key Lab Climate Resources & Environm Continental S, Zhanjiang 524088, Peoples R China;[4]Minist Nat Resources, Key Lab Space Ocean Remote Sensing & Applicat, Beijing, Peoples R China;[5]Chinese Acad Sci, Guangzhou Inst Geochem, State Key Lab Deep Earth Proc & Resources, Guangzhou 510640, Peoples R China;[6]East China Normal Univ, State Key Lab Estuarine & Coastal Res, Shanghai 200241, Peoples R China

年份：2026

卷号：227

外文期刊名：MARINE POLLUTION BULLETIN

收录：SCI-EXPANDED(收录号：WOS:001701707500001)、、EI(收录号：20260920153293)、WOS

基金：This work was financially supported by National Natural Science Foundation of China (42371162) , Guangdong Natural Science Foundation of China (2025A1515011424) , the Innovative Team Project of Guangdong Universities (2019KCXTF021) , First-class Discipline Plan of Guangdong Province (080503032101, 231420003) , and Guangdong Provincial Observation and Research Station for Tropical Ocean Environment in Western Coastal Waters (GSTOEW) . Samples were collected onboard of R/V " Tianlong" implementing the open research cruise NORC2023-11 supported by NSFC Shiptime Sharing Project (project number: 42249911) . The data for this paper are available as the online supplementary dataset.

语种：英文

外文关键词：Beibu gulf; Heavy metals; Black carbon; Hydrodynamics; Ecological risks

外文摘要：Semi-enclosed bays are particularly vulnerable to heavy metal accumulation because water exchange is limited and particle-bound contaminants are efficiently retained. In this study, six heavy metals (Cr, Cu, Zn, As, Pb, Cd) and key biogeochemical indicators, including total organic carbon (TOC), total nitrogen (TN), the C/N ratio, delta C-13(TOC), delta N-15, black carbon (BC), delta C-13(BC), and the BC/TOC ratio, were measured in surface sediments from the Beibu Gulf to investigate the sources, distribution, and controlling factors of heavy metals. The results indicate that As is primarily derived from natural weathering, whereas Cd reflects mixed natural and anthropogenic inputs; Cr, Cu, Zn, and Pb are predominantly associated with anthropogenic activities. The spatial variability of heavy metals is pronounced, with elevated concentrations in the northeastern Beibu Gulf and lower levels in the southeastern region. Hydrodynamic sorting under monsoon-driven circulation regulates grain size, TOC, and BC distribution, thereby governing metal retention, while localized inputs further modulate the formation of metal hotspots. Our findings underscore the significant influence of hydrodynamic processes on heavy metal distribution in the Beibu Gulf. Although overall contamination levels are generally low, localized ecological risks linked to Cu and Cd persist in low-energy nearshore convergence zones, highlighting the need for spatially targeted monitoring and management.