稀土元素由于其独特的物理性质和化学性质，被广泛应用于新能源、新材料、航空航天等多个领域，被称为“现代工业的维生素”，成为现代工业必不可少的一部分。利用氢氧化镁对铕离子进行吸附，考察各个吸附因素对吸附量的影响。实验结果表明，初始浓度为600 mg/L，在固液比为1:3、pH = 6、吸附温度为25℃的吸附条件下，氢氧化镁对铕离子的吸附量可达1650 mg/g，溶液中铕离子去除率在91%左右，对于初始浓度为500 mg/L以内的铕离子溶液，氢氧化镁对其的去除率可达98%以上。 Due to the unique physical and chemical properties, rare earth elements have been widely used in new energy, new materials, aerospace and other fields. Rare earth elements have been called “modern industrial vitamins” and become an indispensable part of modern industry. The effects of various adsorption factors on the adsorption capacity of europium ion were investigated by magnesium hydroxide adsorption. The experimental results show that the adsorption capacity of magnesium hydroxide on europium ion is up to 1650 mg/g and the removal rate of europium ion in the solution is about 91% when the initial concentration is 600 mg/L, the solid-liquid ratio is 1:3, the pH is 6 and the adsorption temperature is 25˚C. For europium ion solution with initial concentration less than 500 mg/L, the removal efficiency of magnesium hydroxide can reach more than 98%.