The invention provides a glass sand filtering material and a preparation method thereof, and belongs to the technical field of
water treatment. The particle surface of the material is rough, and the material has a micro-nano binary structure; the micron-sized structure is a non-uniformly distributed multi-layer structure, and the pore size is about 2-5 [mu] m; and the nano-scale
pore diameter is 5-70 nm. The preparation method comprises the following steps: carrying out ultrasonic cleaning,
drying, high-temperature annealing treatment and soaking in a
buffer solution on the glass sand, then adding a villiaumite-containing
aqueous solution for continuous soaking, taking out for cleaning, carrying out
vacuum drying, carrying out heat treatment, then placing in an activating solution for reaction, and finally soaking, cleaning and
drying in deionized water to obtain the glass sand. By preparing the novel glass
sand filter material with the micro-nano binary structure, the glass
sand filter material has the characteristics of high filtering precision, large specific surface area, self-cleaning property, high
assimilative capacity, high antibacterial capacity and the like, the filtering performance of the
filter material can be greatly improved, and the service life of the
filter material is prolonged.