The reaction of synthesized Ca-bound, Fe-bound, and Al-bound organo-mineral complexes with Ca²⁺,Fe³⁺,and Al³⁺ ions in solution, respectively, was studied. The results showed that the Ca²⁺ or Al³⁺ in solution could not exchange the bound-Fe in complex, the Ca²⁺ or Fe³⁺in solution could exchange little bound-Al in complex, and Fe³⁺ or Al³⁺ in solution could exchange more bound-Ca in complex. However, the exchangeable capacity was related to pH in solution and type of clay minerals. Although the bound ions in complexes were hardly exchanged, the Ca²⁺,Fe³⁺,or Al³⁺ in solution could complex with organo-mineral complexes.