摘要
大亚湾表层沉积物以粉砂质粘土、粘土质粉砂及粉砂为主组成。表层沉积物的污染表现以硫化物及铅、锌、汞、砷为主,其中硫化物、铅、锌的污染现象在本海区普遍出现。污染物质从海水向沉积物转移是多因素综合作用的结果,悬浮物、生物及沉积物的吸附等多种转移方式都可能存在。沉积物中某些元素之间存在一定的相关性,但沉积物与其粒度组成的粘土含量及海水理化要素之间无明显相关性。
The particle size of the surface sediments in Daya Bay mainly consisted of silty clay, clay silt and silt. The sediments were contaminated chiefly by sulfides and some heavy metals (Pb, Zn, Hg, As). Among them the pollution phenomanon of sulfides, Pb and Zn widely existed in the Bay. The transfer of these pollutants from seawater forward to sediments resulted in comprehesive action of factors, e.g., adsorption of suspended matter, or organisms and sediments etc. There is a certain correlation between some elements in the sediments, but there is not a clear correlation of sediments with the clay content of which their particle size consisted and with the environmental factors of seawater.
出处
《热带海洋》
CSCD
1992年第1期65-71,共7页
基金
国家自然科学基金"大亚湾近海污染与生态系综合研究"课题的子课题
关键词
沉积物
污染
地球化学行为
大亚湾
Daya Bay, sediments, pollutants, geochemical behaviour
