Origin and behavior of Rare Earth Elements in Acid Mine Drainage
Rare Earth Element (REE) concentrations were determined in Acid Mine drainage (AMD), pore water, country rock, pyrite, coal, and sediment samples from the Sitai coal mine and the Malan coal mine, Shanxi province, China. The AMD have high REE concentrations with typical convex shale-normalized patterns. REE concentrations in country rock samples are one order of magnitude higher than that of pyrite and coal samples.The most probable origin of the high REE concentrations in AMD is the acid leaching of country rocks. The behavior of REE in AMD is mainly controlled by pH. At lower pH (2.76), no fractionation of the REEs in AMDis observed; the dominant REEs remain dissolved in AMD. At higher pH (4.83 and 6.82), REEs partitioned from the aqueous phase to the solid phases, and Heavy Rare Earth Elements (HREE) and Middle Rare Earth Elements (MREE) were preferentially removed by Fe-bearing minerals relative to Light Rare Earth Elements (LREE).
H.Sun F.Zhao Y.Tang S.Wu
Department of Resource and Earth Science, China University of Mining and Technology,Haidian District Key State Laboratory of Coal Resource & Mine Safety, P.R.China(at CUMTB),Haidian District, Beijing,
国际会议
第十二届水-岩相互作用国际研讨会(P0roceedings of the 12th International Symposium on Water-Rock Interaction)
昆明
英文
783-787
2007-07-31（万方平台首次上网日期，不代表论文的发表时间）