column:Spatial patter and provenance of heavy metal elements in the surface sediments in the northern South China Sea shelf

WANG Yuming; WANG Yukun; CHEN Xiaohong

doi:10.13471/j.cnki.acta.snus.2020D054

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column:Spatial patter and provenance of heavy metal elements in the surface sediments in the northern South China Sea shelf

Research articles | 更新时间：2023-11-01

- column:Spatial patter and provenance of heavy metal elements in the surface sediments in the northern South China Sea shelf
- Acta Scientiarum Naturalium Universitatis Sunyatseni Vol. 61, Issue 1, Pages: 139-150(2022)
- 作者机构：
  
  1.中山大学土木工程学院，广东珠海 519082
  2.南方海洋科学与工程广东省实验室（珠海），广东珠海 519082
  3.广东省地球动力作用与地质灾害重点实验室，广东珠海 519082
- 作者简介：
- 基金信息：
- DOI：10.13471/j.cnki.acta.snus.2020D054
  CLC： X55
- Published：25 January 2022，
  
  Published Online：16 April 2021，
  
  Received：01 October 2020，
  
  Accepted：14 October 2020
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王喻鸣,王玉琨,陈晓宏.南海北部海域表层沉积物重金属含量分布及来源[J].中山大学学报(自然科学版),2022,61(01):139-150.

WANG Yuming,WANG Yukun,CHEN Xiaohong.column:Spatial patter and provenance of heavy metal elements in the surface sediments in the northern South China Sea shelf[J].Acta Scientiarum Naturalium Universitatis Sunyatseni,2022,61(01):139-150.
王喻鸣,王玉琨,陈晓宏.南海北部海域表层沉积物重金属含量分布及来源[J].中山大学学报(自然科学版),2022,61(01):139-150. DOI： 10.13471/j.cnki.acta.snus.2020D054.

WANG Yuming,WANG Yukun,CHEN Xiaohong.column:Spatial patter and provenance of heavy metal elements in the surface sediments in the northern South China Sea shelf[J].Acta Scientiarum Naturalium Universitatis Sunyatseni,2022,61(01):139-150. DOI： 10.13471/j.cnki.acta.snus.2020D054.

摘要

南海北部陆架海域的表层沉积物记录了重金属元素来源及其污染状况的重要信息，可以反映区域生态风险状况，明确其重金属元素含量的空间分布、来源及其与人类活动的关联对理解本区域重金属的生态环境效应具有重要意义。对2016年夏季航次在南海北部陆架海域27个站点采集表层沉积物，开展较系统的沉积物粒度及重金属含量特征研究。结果表明：沉积物以砂、粉砂、砂质淤泥为特征，颗粒粒径变化介于0.77~6.28Φ，平均3.43Φ；其Cu、Zn、As、Cd、Pb和V含量均超平均上地壳值，在漠阳江-海南东部沿岸及韩江入海口重金属元素富集明显；Zn、V、Cr、Ni、Pb、Cu和Cd含量随Al或Sc的增加而线性增加，与沉积物粒径呈正相关，主要为同源性河流陆源碎屑组分输入，受河流入海口排沙和沿岸流的影响明显，人类干扰相对较弱。但As元素的富集不受沉积物颗粒粒度控制，其迁移能力弱，仍是南海北部海域陆架表层沉积物中受人类污染最敏感的元素。

Abstract

The surface sediments in northern South China Sea shelf （SCSS） carry the information of provenances of heavy metal elements and their environmental effects， potential ecological risks and their relationships with human activities. Thirty surface sedimentary samples were collected from the 27 sites in the northern SCSS during the 2016 summer survey. These samples are characterized by sand， silt， silty clay and clay with particles in size ranging from 0.77Φ to 6.28 Φ （average value of 3.43Φ）. The heavy metal elements of Cu，Zn，As，Cd，Pb and V are higher than those in the upper crust and show the significant enrichment along the coastal areas of the Moyang River-Eastern Hainan and the Han River estuary. Zn，V，Cr，Ni，Pb，Cu and Cd contents increase with the amount of Al， Sc and the values of particle size， indicating their similar continental provenance of the weathering materials. Such a pattern is mainly controlled by both transportations from the Pearl River， Han River and Moyang River and coastwise current in the northern SCSS， with rare human interference. However， element As shows poor correlation with the particle size of the surface sediments， suggesting significant human interference and potential environmental pollution.

关键词

重金属元素表层沉积物陆源碎屑输入南海北部陆架

Keywords

heavy metal elemental contentssurface sedimentsinput of continental provenancethe northern South China Sea shelf

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