广东近海水域重金属含量及其分布规律的研究

广东近海水域重金属含量由陆向海方向,随海水盐度、pH值升高及化学耗氧量降低而降低。重金属与环境要素相关的密切程度不仅取决于它们在水体中的迁移形态和化学性质,而且还受到环境理化要素变化的制约。各种重金属元素与水体中有机物的相关程度顺序为:Cu>Zn>Pb>Cr>Hg>As。对影响海水重金属含量及其变化规律的几个主要外界影响因素进行了讨论。

CONTENTS AND DISTRIBUTION OF HEAVY METALS IN THE OFFSHORE AREA ALONG GUANGDONG PROVINCE

The contents of the heavy metals in the offshore area along Guangdong Province were found to decrease together with COD from the coast area to the open sea while the salinity and pH value increased in the same direction. The distribution of Cu,Zn and Pb was mainly effected by the content of organic material, and the behavior of Cr, Hg and As was controlled by salinity and pH yalue. Other factors affecting the heavy metal contents were discussed as well