The optimal formula of the absorbent solution is as follows: Attapulgite clay 28%, m (Rare earth):m (Attapulgite clay) 6%, NaOH about 1%.

• 实验得出吸收液最佳配方为：凹凸棒石粘土28%25，稀土为粘土加入量的6%25，NaOH约1.；0%25。