▎ 摘　　要

NOVELTY - Preparation of river sand-loaded graphene oxide/titanium dioxide (GO/TiO2) filler includes sieving river sand by 20-30-mesh sieve, washing with water, washing with 8-10 wt.% hydrochloric acid for 2-3 times, washing with deionized water until pH is 6-8, dispersing treated river sand in graphene oxide/titanium dioxide (GO/TiO2) composite material water-dispersible suspension, uniformly mixing, placing the mixture in Petri dish, drying at 100-150 degrees C for 3-5 hours, and obtaining river sand-loaded GO/TiO2 filler. USE - Preparation of river sand-loaded GO/TiO2 filler for filling in reaction column (claimed). ADVANTAGE - Antibiotic material is removed, and the secondary pollution of adsorbent is avoided. The density of the filler in the reaction column is increased, and the secondary pollution caused by GO and TiO2 loss by water flow is prevented. DETAILED DESCRIPTION - Preparation of river sand-loaded GO/TiO2 filler comprises preparing GO/TiO2 composite material by adding graphene oxide powder into deionized water, ultrasonically treating for 20-40 minutes to obtain graphene oxide suspension, where mass ratio of graphene oxide and deionized water is 1:1000-3:1000, adding sodium hydroxide (NaOH) to prepared graphene oxide suspension, adding titanium tetrachloride (TiCl4) solution, stirring to obtain 0.02-0.03 mol/L mixed solution, where volume ratio of TiCl4 solution and graphene oxide suspension is 1:3-1:2, centrifuging at 3500 revolutions/minute for 15 minutes, taking the precipitate, and drying at 100-110 degrees C for 3-5 hours to obtain GO/TiO2 composite material, adding the obtained GO/TiO2 composite material to deionized water at 6:1000 mass ratio, and ultrasonically processing at 120-140 W for 20-40 minutes to obtain GO/TiO2 composite material water-dispersible suspension, river sand loading on GO/TiO2 by sieving river sand by 20-30-mesh sieve, washing with water, washing with 8-10 wt.% hydrochloric acid for 2-3 times, washing with deionized water until pH is 6-8, dispersing treated river sand in GO/TiO2 composite material water-dispersible suspension, uniformly mixing, placing the mixture in Petri dish, drying at 100-150 degrees C for 3-5 hours, and obtaining river sand-loaded GO/TiO2 filler. An INDEPENDENT CLAIM is included for filling river sand-loaded GO/TiO2 filler in reaction column comprising transparent cylindrical column body filled with river-sand loaded GO/TiO2 filler, where upper end opening and lower end opening of column body are provided with end covers for sealing the two end openings, the end cover on the lower end of the column body is connected with a water inlet and communicated with the interior of the column body, and the end cover on the lower end of the column body is connected with a water outlet and communicated with the interior of the column body.