Some heavy metalions were strongly adsorbed by Mn oxide minerals in soils and aquatic environment.The results showed that the amount of heavy metals(Pb,Cd,Co,Cu,Ni,Zn) adsorbed by Mn oxide minerals in Fe-Mn nodules in soils from China accounted for 60~100 percentage of the total amount of the heavy metals absorbed by the Fe-Mn nodules.The heavy metals adsorption capacity varied with types of Mn oxide minerals in the Fe-Mn nodules.The amount of heavy metals adsorbed by Mn oxide minerals which contained todorokite and lithiophorite in Fe-Mn nodules of Shajiang black soils in Shandong province was the highest,that of yellow-brown soil and yellow-cinnamon soil in Hubei province with birnessite and lithiophorite next,and that of red soil in Hunan Province which contained only lithiophorite the lowest.Difference in structure and crystallinity of the Mn oxide minerals led to different amounts of heavy metals adsorbed by Mn oxide minerals in the Fe-Mn nodules.The contents of Mn oxide minerals and percentage of Mn(Ⅳ) in nodules affected the amounts of Co²⁺ adsorbed by Fe-Mn nodules because Co²⁺ was oxidized to Co³⁺ in the process of Co²⁺ adsorption.