【摘要】 依据20多个航次的调查资料,简要描述和分析了大鹏湾表层沉积物中8项有害要素多年的平均分布变化及其环境质量变化。结果表明:绝大多数表层沉积物中的有害要素含量在本湾的西部和北部沿岸区域明显偏高,这说明香港和深圳某些渠道的排放对沿岸区域造成了污染。9 a调查期间,香港海区表层沉积物中Pb、Cu、Cr、As和Hg含量的年际变化趋势是下降的,而Zn、Cd和硫化物含量的年际变化趋势是上升的。大鹏湾表层沉积物中有害要素的污染强度顺序是"硫化物>Pb>Cu>Zn>Cr>Cd>As>Hg"。整体而言,大鹏湾中央主区表层沉积物的环境质量仍好,符合I类海洋沉积物质量标准,而在湾的西部和北部沿岸区域表层沉积物的环境质量较差。更多还原

【Abstract】 The distributions and changes of eight harmful parameters and environmental quality in the surface sediments of the Mirs Bay were briefly described and analyzed on base of the data obtained from more than 20 times of investigation.The results showed that the contents of almost pollutans in northern and western coastal zones were higher than other zones in the Mirs Bay.The pollutants were from the drainage ways in the coastal zones of the Hongkong and Shenzhen.The variation trends of contents of Pb,Cu,Cr,As and Hg were decreased,while contents of Zn,Cd and sulfides were increased in the surface sediments in the Hongkong zone during nine years.The order of pollution strength of the pollutans in the surface sediments was "sulfide>Pb>Cu>Zn>Cr>Cd>As>Hg".Overall,the environmental quality was good in the central zone,up to I class quality specification of the marine sediments,and quite poor in the northern and western coastal zones of the Mirs Bay.更多还原