The invention relates to a phospho
modified cellulose adsorbent, and a preparation method and application thereof. The technical scheme is as follows: the preparation method comprises the following steps: taking 1,3-
dibromopropane and
tributyl phosphite, carrying out reaction at 138-142 DEG C for 18-22 hours, and carrying out rotary
evaporation at 115 DEG C under reduced pressure to obtain an
intermediate product I; taking DMF (N,N-
dimethylformamide), adding OCS and NaH in a
nitrogen protective
atmosphere, stirring in an
ice water bath for 1 hour, removing the
ice water bath, heating to 40-45 DEG C, reacting for 4 hours or so, adding the
intermediate product I, mixing and stirring to react at
room temperature for 24 hours, carrying out vacuum
filtration, washing respectively with HCl and
distilled water, and
drying to obtain an
intermediate product II; and in a
nitrogen protective system, mixing the intermediate product II with
ethanol, adding a KOH solution, stirring under
reflux at 75 DEG C for 24-50 hours, carrying out vacuum
filtration, washing respectively with HCl and
distilled water to a
neutral state, and
drying. The adsorbent provided by the invention has high separation and enrichment efficiency, and can be used for selectively adsorbing
scandium from a mixed
rare earth ion solution.