| 摘 要： | This paper deals with the effect of amino acid and humic acid on the ion exchange ratio (%)-pHS-shaped curves of the interactions between Cu, Pb, Zn, Cd and clays. The main results are: (i) Withthe increase of concentration of organic matters, S-shaped curve moves first to the left and then to theright, and △pH-(sh(L)) has a linear relationship with log (OB)_m. (ii) With the extent of a certain amountof organic matter, the sequence of △pH-(sh(L)) of heavy metals is Cu Pb Zn Cd, △pH-(sh(L)) has a linearrelationship with IogK_(OA). (iii) With the existence of different amino acids, the relationship between△pH-(sh(L)) of S-shaped curves of interaction between Cu and illite and IogK_(OA) for Cu and various aminoacids are linear. (iv) Quantitative explanations regarding the experimental phenomenon mentioned abovecan be written as the following equation: pH_((CIER))=-1/m{log[(α_1K_(OA)α_2(OB_m))/K_(RB_m)]?2}.(v) Discussion of the phenomenon of left-right shifts of S-shaped curve in terms of reaction mec
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