| Ferromanganese nodule in seawater is an important mineral resources ,which has become the world's attention in the twenty-first century strategic resources. Ferromanganese nodule which reserves are enormous is in the 4000 meters - 6000 m seafloor sediment surface.Natural ferromanganese nodule contains Mn, Fe, Cu, Co, Ni, U, Au and platinum group elements, rare earth elements such as 60 kinds of metals. Rare Earth Elements (REEs) in geochemical nature of the oceanic iron-manganese nodules in the study were more widely used.Ferromanganese nodule in Central Pacific's CC and CP areas are rich in rare earth elements.Guo Shiqin found in CP area rich in REE than the CC area in 1992, Seamount nodules' REEs are more than plain hilly region's and REEs show Zonal distribution within ferromanganese nodule; Between May-June 1987, China and the West German that got 5 ferromanganese crusts and 6 ferromanganese nodules investigate in the South China Sea on earth science,they made a more detailed discussion on ferromanganese nodule of REEs abundance, distribution patterns and associated elements of the relationship and the source of REEs . The results showed that:(1) REEs of nodules and crusts have the same distribution pattern by the chondrite normalized.(2) Ce positive anomalies, Eu loss was not obvious.(3) REEs of nodules and crusts are mainly from weathering of acid rocks, dripping slowly after the deposition; Pan Jiahua, etc. In 2002, using the "Ocean One" research vessel in different sea areas in the Pacific, obtained 18 crust samples which were analyzed and researched REEs' content ,distribution patterns and sources in the Pacific Ocean with chemical analysis and ICP-AES analysis. The results showed that: (1) REEs in the Pacific Ocean crust are in an abnormally high level. (2) The distribution pattern of REEs is basically the same, LREE enrichment, in particular a considerable enrichmentof Ce, was the more obvious positive anomalies, while the HREE are generally loss. (3) Total REEs and Mn were positively correlated with Mn / Fe correlation is not obvious, reflected in the study area the crust of the REEs are mainly from the seawater ,the overlying water's sediment, the slow volcanic eruptions, ocean floor basalt weathering dripping and Biochemistry deposition.As iron and manganese oxides are an important active component in ferromanga- nese nodule and REEs' adsorption on them surface have significant differences, we can study the Fe(OH)3 and MnO2 to the adsorption of REEs, which can learn more about ferromanganese adsorpte REEs.This thesis by laboratory simulation, configuring the ideal water for the medium and Fe(OH)3,MnO2 as the research object,investigate REEs adsorption rate and adsorption thermodynamic parameters, and on environmental factors including temperature, pH and salt concentration on adsorption was studied.Preliminary conclusions are drawn in this paper:(1) kinetic studies demonstrated that Fe(OH)3, MnO2 on the adsorption kinetics of REEs were found primary kinetic equation.(2) Adsorption isotherm results showed that the Fe(OH)3's adsorption isotherm was fitted to Henry and Freundlich isotherm; MnO2's available adsorption isotherms fitted Langmuir isotherm.(3) Thermodynamic studies show that the Fe(OH)3's adsorption thermodynamic functions are theΔG°<0,ΔH°>0,ΔS°>0; MnO2's adsorption thermodynamic functions areΔG°<0,ΔH°<0,ΔS°<0.(4) Environmental factors show that Fe(OH)3's adsorption of REEs increase as salt concentration, pH, temperature's increasing; MnO2's adsorption of REEs increase as salt concentration's increasing and pH, temperature's decreasing .(5) Complex manganese oxides on the adsorption rate of REEs with Fe / Mn value of larger shows an increasing trend.
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