Rare earth modified aluminum-based adsorbent as well as preparation method and application thereof

The invention discloses a rare earth modified aluminum-based adsorbent as well as a preparation method and application thereof. The rare earth modified aluminum-based adsorbent is a mesoporous material and comprises hydroxy aluminum and lanthanum acetate, and pore channels of the hydroxy aluminum are filled with the lanthanum acetate. The preparation method comprises the following steps: adding pseudo-boehmite into a La(NO3)3 aqueous solution and conducting uniform dispersing to obtain a turbid solution; adding glacial acetic acid into the turbid liquid, and conducting stirring at the same time until the turbid liquid forms sol; and drying the sol to constant weight to obtain the rare earth modified aluminum-based adsorbent. The preparation method does not need a high-temperature roastingprocess, is simple and convenient to operate, short in consumed time and simple in equipment, and is suitable for industrial batch production. The rare earth modified aluminum-based adsorbent disclosed by the invention is sta