为了研究稀土元素的生物可利用性,采用连续提取的方法对稀土尾矿库周围的土壤样品进行稀土存在形态测定,并消解土壤样品测定稀土总量。结果表明,镧和铈的形态88%~95%以残渣态存在;而在剩余10%左右的形态中,主要以X2无定型铁锰氢氧化物共沉淀态和X4腐殖质和无定型氧化物吸附态存在。所以,稀土尾矿库区周边稀土元素的植物可利用性较低。 In order to study the bioavailability of rare earth elements, continuous extraction method was used to measure the shape of rare earths in the soil samples around the rare earth tailings ponds, and the total amount of rare earths was determined by digestion of soil samples. The results showed that the morphology of lanthanum and cerium existed in the residual state of 88% -95%, while in the remaining 10%, the morphology of xanthanum iron-manganese hydroxide coprecipitated and X4 humus and amorphous oxide State exists. Therefore, rare earth tailings around the rare earth elements plant availability is low.