The invention discloses a method for preparing a loofah
sponge immobilized
ionic liquid adsorbent and application techniques of the adsorbent. The method is characterized by comprising the following steps: removing peels and kernels of a mature loofah fruit, washing by water to remove soil and impurities,
drying, smashing, treating the smashed loofah
sponge by
sodium hydroxide and
hydrogen peroxide,
drying to obtain an oxidized loofah
sponge, adding 62%-72% of
epoxy chloropropane and 15%-28% of oxidized loofah sponge in percentage by
mass into a reactor, stirring and reacting at the constant temperature of 70-80 DEG C for 40-60 minutes, cooling, adding 4%-10% of
pyromellitic dianhydride and 2%-6% of N-ethyl-3methylpyridine
bromate ionic liquid, stirring and reacting for 48-60 hours at the constant temperature of 33-37 DEG C, cooling, carrying out suction
filtration, washing by deionized water till filtrate is neutral, washing by a little ethyl
alcohol and
drying in a
vacuum drying oven at the temperature of 50 DEG C to obtain the loofah sponge immobilized
ionic liquid adsorbent. The adsorbent has the advantages of very high
arsenic adsorption capacity, excellent physicochemical and mechanical properties, strong regeneration capacity,
high frequency of repeated use, low cost and
environmental protection.