The slightly negative Ce anomalies in both amorphous ferric oxide/hydroxide and 1 nm-manganates indicate that Ce3+ can not be oxidized to Ce4+ to precipitate due to the reducing or oxygen depletion zone in the bottom sediments in which the diagenetic nodules were formed.

Adsorption and oxidation of arsenic(Ⅲ) by Fe-Mn nodules

Fe-Mn nodules collected from the East Pacific Ocean were used for decolorization of a cationic dye methylene blue(MB) in a batch system.

Soil of Fe-Mn nodules background in Litang karst was analyzed.

Redox characteristics between several Fe-Mn nodules in soils and Cr(Ⅲ)(Ⅰ)——Effect of type of Mn oxide mineral and adsorbed ion;

Migration and conversion of Cr (Ⅵ) in Fe-Mn nodule

In this paper, the weight distribution, the colours and the element geochemistry characteristics of Fe-Mn nodules are studied.

Ferromanganese crusts, ferromanganese nodules and stratabound layers and lenses ferromanganese deposits are the main types of the ocean floor ferromanganese deposits.

The results showed that the amount of heavy metals(Pb,Cd,Co,Cu,Ni,Zn)adsorbed by Mn oxide m inerals in Fe Mn nodules in soils from China accounted for 60～100 percentage o f the total amount of the heavy metals absorbed by the Fe Mn nodules.

Chemical selective dissolution and X ray diffraction methods were used to investigate the types of manganese minerals in Fe Mn nodules of soils.

This paper briefly deals with geological setting and macro_characteristic of Mn_bearing sediments and occurrence of ferromanganese nodule at the lower part in Wayaobao formation of upper Triassic in Xinpu district of Guanlin county of Guizhou, comparatively gives full details of its geochemical characteristic.