胶州湾东北部海水中锌的存在形态及其分布

研究微量元素在海水中的存在形态是海洋化学上比较重要的课题之一,对了解微量元素在海洋中的循环具有重要的意义。关于锌在海洋中的存在形态曾有过详细的评论。 海水中的无机锌主要以Zn~+、Zn(OH)~+及Zn(CO_3)~0的形式存在。其含量范围一般在1—50μg/L之间,平均值约为3μg/L.近岸及河口区含量较高,个别测定值可高达300—400μg/L。关于海水中锌的测定方法如ASV法和分光光度     

夏季渤海西南部及黄河口海域营养盐分布特征

There are few papers dealing with nutrients distribution in the mixing region of the Huanghe River Estuary, although the Huanghe River is one of the largest rivers in China. We investigated nutrients (nitrate nitrite, phosphate and silicate) at 81 stations in the southwest Bohai Sea and the Huanghe River Estuary in July, 1984. The concentrations of nitrate, nitrite, phosphate and silicate are higher in the estuary and offshore than those in the centre of the Bohai Sea. They are 44.3ug-at/L for nitrate, 0.31ug-at/L for nitrite, 0.36ug-at/L for phosphate and 60.4ug-at/L for silicate. There are negative correlations between nutrients and salinity in this region. The correlation coefficients in surface layer are:γSiO3-si=-0.963(n=81) γPO4-P=-0.829(n=81) γNO3-N=-0.971(n=81) γNO2-N=-0.553(n=81) The correlation coefficients show that, in the surface layer, there are no obvious removal of nutrients during mixing river-water and seawater in the Huanghe River Estuary.