THE EFFECT OF AMINO ACIDS ON COPPER (Ⅱ)-GOETHITE ION EXCHANGE IN SEAWATER

In seawater, aside from metal elements and suspended particles, organic substances amount to about 500-2,000 ug carbon/18], which is not neglegible in comparison with that of minor metal elements. But in the study of the interaction of the three constituents (metal elements, organics, and suspended particles), theeffect of organics in seawater on the surface reaction of metal element--suspended particles has usuallybeen neglected. Recent theoretical research1,11] confirmed the importance of the effect of organics inseawater on the surface reaction of metal element--suspended particles. Generally, the effect of organicson the reaction of metal ions, especially Cu(II), on a solid surface is either promotive2] or inhibitive7,9]. So far the fact that organics cannot affect the surface reaction of Cu(II) ions on solids has not been reported in literature. Our experimental results showed that none of the amino acids in seawater affect Cu(II)-goethite ion exchange under certain experimental condition (such