风化壳中腐植酸与REE形成配合物的模拟研究

A Model Study on the Formation of Compound of Humic Acid and REE under Weathering Conditions in the Weathering Crust REE Deposits

研究了风化壳稀土矿的腐植酸及其特点，证实了富里酸与Ｌａ，Ｃｅ，Ｐｒ，Ｓｍ，Ｅｕ，Ｇｄ，Ｔｂ，Ｙ在常温常压下，ｐＨ值在４～６．５之间形成配合物的可能性．根据荧光光谱和红外光谱研究，探讨了自然界中风化条件下富里酸与稀土元素之间的化学行为及在风化壳稀土矿形成过程中腐植酸的作用．

The humic acid and its characteristics in the weathering crust REE deposits were studied. The possibility of formation of compounds between humic acid and La, Ce, Pr, Sm, Eu, Gd, Tb and Y under normal temperature and pressure and pH 4￣6 5 was confirmed. Based on the studies of fluorescence and infrared spectra, the chemical interactions between humic acid and REEs under weathering conditions and the role of fluvic acid in the formation of weathering crust REE deposits were explored.