罗源湾表层海水中重金属含量的分布特征分析

分析了2011年8月罗源湾表层海水中重金属数据,研究了海水中重金属的分布特征及影响因素,结果表明表层海水重金属的测值均低于《海水水质标准(GB3097-1997)》的第二类标准值;Cu、Pb、Cd在分布上大致呈现近岸海域向远岸逐渐减少的趋势,但As、Hg的空间分布趋势却与上述3种元素相反;As、Hg与盐度呈正相关性,Hg与悬浮颗粒物含量呈负相关性,说明As、Hg离岸高值区的形成与海水盐度、悬浮颗粒物含量有关;重金属中Hg-As和Cd-Pb的相关性明显,说明Hg-As与Cd-Pb有显著的同源性。

Distribution of heavy metals in the surface water of Luoyuan Bay

Based on the heavy metal data obtained from the surface water of Luoyuan Bay in August 2011,the heavy metal distribution characteristics and its influencing factors were analyzed.The results showed that all heavy metal contents in surface seawaters were lower than the standard values of categories Ⅱ of the seawater quality standard;Cu,Pb and Cd tended to be gradually decreased from the coastal sea to the further offshore area.On the contrary,As and Hg showed an upward tendency;the heavy metals such as As,Hg were positively correlated with salinity,and Hg was negatively correlated with suspended materials,which were expounded that the formation of high value offshore areas were effected by the salinity and suspended matters;the correlation between Hg-As and Cd-Pb was obvious,which showed that Hg-As and Cd-Pb had the same source.