酸化物による無機陰イオンの吸着 : 吸着実験による巨視的吸着挙動とその場分光分析による微視的表面錯体構造

抄録

Adsorption of inorganic anions at oxide surfaces are important factor regulating the anion concentrations in natural waters. The understanding of the behavior and nature and adsorbed anion species over wide variety of oxides and over the full range of environmental conditions is fundamental to prediction of the migration and long-term fate. There are numerous studies which investigated the macroscopic adsorption behaviors of anions on Fe and Al oxide surfaces as function of pH, surface loading and ionic strength. In addition, the microscopic surface structures of these anions on Fe and Al oxide surfaces on wet condition have been investigated by means of in-situ spectroscopic analyses because of the development of the spectroscopic technique from 1990s. The macroscopic adsorption behaviors and microscopic surface complexation structures of sulfate, selenate, selenite, arsenite, arsenate, phosphate, chromate, silicate, carbonate, fluoride and boron on goethite, hematite, magnetite, hydrous ferric oxide, γ-Al_2O_3, gibbsite, corundum and hydrous aluminum oxide are reviewed in the paper.