ABSTRACT

The authors show the removal of fluoride, chloride, sulfate, phosphate, borate ions and soluble silica from seawater by marine carbonate sedimentation. The authors have estimated the amounts of anions and soluble silica discharged into seawater and those of anions and soluble silica removed from seawater by marine carbonate sedimentation. The balance between both amounts estimated indicates that the significant portions of fluoride, phosphate and borate ions discharged into seawater are removed from seawater by marine carbonate sedimentation.