铜鼓岭—清澜湾近岸海域表层沉积物重金属地球化学特征及环境质量评价
Geochemical characteristics and environmental assessment of heavy metal elements in surface sediments from the offshore area of Tongguling-Qinglan bay
摘要
Abstract
In order to understand the geochemical characteristics and pollution degree of heavy metals in surface sediments near the Tongguling-Qinglan Bay,the geochemical and spatial distribution characteristics of 7 heavy metals in the surface sediments of Tongguling-Qinglan Bay were studied,and the pollution degree of heavy metals was evaluated by means of geoaccumulation index,Nemero composite index and potential ecological hazard index.The results showed that the contents of heavy metals in the surface sediments of Tongguling-Qinglan Bay were generally low.The contents of Cu,Pb,Zn,Cr,Cd,As and Hg were 3.37～27.81,6.77～39.79,0.50～110.00,3.38～73.92,0.03～0.17,2.50～17.02 μg·g-1 and 3.36～105.03 ng·g-1,respectively,which were in line with the first class standard of'Marine sediment quality:GB 18668-2002'.The abundance and spatial distribution of Cu,Pb,Zn,Cr and Hg were mainly controlled by the size of the elements particle and the adsorption of organic carbon,and their material sources were mainly terrestrial fine-grained sediments.The source and distribution of As and Cd were mainly affected by human activities,and Cd was also affected by the enrichment of biological food chains.The results of the three evaluation methods all indicated that the heavy metals in the surface sediments of the study area were not significantly polluted,the potential ecological hazards of heavy metals were low,and the environmental quality was fine.关键词
表层沉积物/重金属/地积累指数/内梅罗综合指数/潜在生态危害指数/铜鼓岭-清澜湾Key words
surface sediments/heavy metals/geoaccumulation index/Nemerow comprehensive index/potential ecological hazard index/Tongguling-Qinglan Bay分类
海洋科学引用本文复制引用
张从伟,陈旸,瞿洪宝,姜海滨,宋家伟,伍德明,朱钰..铜鼓岭—清澜湾近岸海域表层沉积物重金属地球化学特征及环境质量评价[J].世界核地质科学,2025,42(4):871-883,13.基金项目
海南省海洋地质资源与环境重点实验室自主课题(2023年度)"海南典型沿海市县近岸海域表层沉积物重金属环境质量评价研究(编号:23-HNHYDZZYHJZZ008)"和海南省海洋地质资源与环境重点实验室自主课题(2022年度)"海南岛东侧外陆架海绿石赋存层位、沉积特征与利用性能研究(编号:22-HNHYDZZYHJZZ006)"联合资助 Supported by Self-developed Project of Hainan Key Laboratory of Marine Geological Resources and Environment(2023)"Research on the Environmental Quality Evaluation of Heavy Metals in Surface Sediments of Coastal Waters in Typical Coastal Counties and Cities of Hainan(No.23-HNHYDZZYHJZZ008)" （2023年度）
Supported by Self-developed Project of Hainan Key Laboratory of Marine Geological Resources and Environment(2022)"Research on the Occurrence Layer,Sedimentary Characteristics and Utilization Performance of Marine Green Stone on the Continental Shelf East of Hainan Island(No.22-HNHYDZZYHJZZ006)" （2022）
