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] Laboratory for Coastal Ocean Variation and Disaster Prediction, College of Ocean and Meteorology, Guangdong Ocean University, Zhanjiang, 524088, China; [2] State Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, 511458, China; [3] Key Laboratory of Climate, Resources and Environment in Continental Shelf Sea and Deep Sea of Department of Education of Guangdong Province, Guangdong Ocean University, Zhanjiang, 524088, China; [4] Key Laboratory of Space Ocean Remote Sensing and Application, Ministry of Natural Resources, China; [5] State Key Laboratory of Deep Earth Processes and Resources, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou, 510640, China; [6] State Key Laboratory of Estuarine and Coastal Research, East China Normal University, Shanghai, 200241, China

年份：2026

卷号：227

外文期刊名：Marine Pollution Bulletin

收录：EI(收录号：20260920153293)

语种：英文

外文关键词：Anthropogenic - Biogeochemistry - Organic carbon - Water pollution - Weathering

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, δ13CTOC, δ15N, black carbon (BC), δ13C??, 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. ? 2026 Elsevier Ltd.