胶州湾海水中的钙和镁

THE CALCIUM AND MAGNESIUM IN SEAWATERS OF THE JIAOZHOU BAY

于1989年10月28日在胶州湾的23个站位采集表层水样,对Ca、Mg及盐度、氯度、碱度等化学要素进行了测定,并用崂山水库水进行了稀释实验。结果表明,Ca/s,Mg/s均高于大洋水,其值分别为0.01250±7×10^(-4)和0.03728±1×10^(-4)。湾东北部的Ca,Mg均高于中部及湾口海域,这是湾东北部的工业废水及高盐卤水排放所致;CaCO_3(20℃)呈现过饱和状态。认为,ca,Mg有良好的保守性,低盐混合水样在放置过程中pH的下降可能与空气中CO_2的溶解有关,从而将引起ca,Mg含量的相对增高。

The values of chemical parameters Ca, Mg, salinity, chlorinity and alklinity in the seawater at 23 stations in Jiaozhou Bay were determined and the dilution experiments of seawater with Laoshan Reservoir water were made. All the results showed that the values of Ca/s or Mg/s in Jiaozhou Bay seawater are greater than those in ocean water. The average values of Ca./s and Mg/s in Jiaozhou Bay were 0.01250±7×10-4 and 0.03728±1×10-4, respectively. The contents of Ca and Mg in the seawater of the northeastern part of the bay being greater than those in the middle and mouth are due to the inputs of industrial waste waters and the high salinity-brines. The content of CaCO3(20℃) is in oversaturation condition. The results of in situ and dilution experiments show that the Ca and Mg have good conservation property and that the decrease of pH values of low salinity mixed seawater may be related to the solution of CO2 in the atmosphere and the concentrations of Ca and Mg may be induced to increase.