平潭海域溶解态铜、铅、镉的分布

Distribution of dissolved Copper,Lead and Cadmium in Pingtarn Waters

１９９０年５月福建平潭海域溶解态铜、铅、镉含量范围（平均值）分别为０．３２～２．０２（０．８１）、０．００７～０．８８０（０．２３５）和０．００８～０．０５２（０．０２３）ｍｇ·ｍ￣（－３）；１０月的分别为０．５２～１．７９（０．８８）、０．００７～０．８００（０．３０１）和０．０２１～０．０６０（０．０３５）ｍｇ·ｍ￣（－３）．溶解态重金属含量分布５月和１０月具有明显不同的区域性，这主要与不同水系消长的影响有关．５月和１０月溶解态镉分别与无机氮和磷酸盐呈线性相关，原子比是△＝Ｃｄ：△Ｎ＝１．１×１０￣（－５），△Ｐ＝５．８×１０￣（－４）．

The Content ranges(the mean values)of dissolved copper,lead and cadmiumin Pingtan waters,Fujian province in Mayl990 were 0.32～2.02(0. 81 ),0.007～0.880(0.235)and 0.008～0.052(0.023)ug/dm￣3,respectively; those in Oct. were 0.52～1.79(0.88),007～0.800(0.301)and 0.021～0. 060(0.035)ug/dm￣3.The content distribution of dissolvedHeavv metal in Mav and Oct.has markedly different characteristics of areal distribution,whichare mainly caused by mixing of various water systems. There are positive relationships betweendissolved cadmium and inorganic nitrogen in May,and between dissolved cadmium and solublephosphate in Oct.. Obtained molar ratios are△Cd:△N=1.1×10￣(-5)and△Cd :△p=5. 8× 10￣(-4)