海洋地质与第四纪地质2025，Vol.45Issue(1)：42-52,11.DOI:10.16562/j.cnki.0256-1492.2024030101
深圳湾表层沉积物砷、镉、汞和营养元素的分布与富集特征
Distribution and enrichment of arsenic,cadmium,mercury,and nutrient elements in surface sediment of Shenzhen Bay
摘要
Abstract
The characteristics of content,spatial distribution,enrichment,source,and ecological risk for arsenic(As),cadmium(Cd),mercury(Hg),nitrogen(N),phosphorus P),and organic carbon(OC)in surface sediment of Shenzhen Bay(Shenzhen,Guangdong,South China)were studied based on sediment samples obtained in 2020.The contents of As,Cd,Hg,TN(total N),TP(total P),and TOC(total OC)in the surface sediment of Shenzhen Bay were 16.46±3.78 μg/g,0.26±0.10 μg/g,0.110±0.044 μg/g,947±281 μg/g,631±214 μg/g,and 1.41%±0.41%,respectively.The contents of three heavy metals are relatively high outside the Shenzhen River estuary and along the coast of the Shekou Port.The contents of TN,TP,and TOC are relatively high in the inner bay.The inputs of human activities such as pollution discharges lead to the enrichments of TN,TP,As,and Cd in surface sediment.TN was enriched significantly throughout the entire bay,while other three elements were mainly enriched in the Shenzhen River estuary,the northern coast of inner bay and port area in the bay mouth.As and Cd might come from mainly vessel discharge,while TN and TP derived probably from coastal domestic sewage.The contents of As,Cd,Hg,and TOC in surface sediment were lower than China's national Class 1 benchmark thresholds for sediment within most of the Shenzhen Bay,which means they could meet the current environment functional requirements for general industrial water use and coastal scenic tourism.However,As,TN,TOC and TP shall be paid with continuous attention as they may pose negative impacts on some sensitive benthos.关键词
重金属/营养元素/表层沉积物/生态风险/深圳湾Key words
heavy metal/nutrient element/surface sediment/ecological risk/Shenzhen Bay分类
海洋科学引用本文复制引用
甘华阳,林海,何海军..深圳湾表层沉积物砷、镉、汞和营养元素的分布与富集特征[J].海洋地质与第四纪地质,2025,45(1):42-52,11.基金项目
中国地质调查局"粤港澳大湾区西部海岸带地质环境调查"(DD20242792) （DD20242792）
科技基础资源调查专项"北部湾资源环境综合调查"(2023FY100800) （2023FY100800）
