河水中所合“活性硅”量(郎用硅钼黄法能测出的硅酸根量,主要是单体和二聚体硅酸离子)较海水高得多;在河口滨海区附近一带,活性硅合量的水平梯度往往很大。究竟河水入海时,其中所合的大部分活性硅经过什么变化?向何处转移?各种物理、化学与生物条件对这种变化的影响如何?这些都是目前国际上一些海洋化学家和海岸地貭学家所注 The amount of “active silicon” (Langmuir silicate content measured by Si-Molybdenum method, mainly monomer and dimer silicate ions) in river water is much higher than that of seawater. In the vicinity of estuarine coastal area, The amount of horizontal gradient is often large. What happens to most of the active silicon in the river when it enters the sea? Where can we shift? What are the effects of various physical, chemical and biological conditions on these changes? These are some of the current international marine chemists and the coast Geologists note