High-temperature calcination was used to modify garnet media. Brunauer–Emmett–Teller (BET) measurements, X-ray diffractometer (XRD), scanning electron microscopy (SEM), zeta potential analysis, and a static adsorption experiment on humic acid removal were carried out to compare unmodified garnet and traditional quartz sand. Fitting adsorption isotherm of the media before and after modification was conducted to determine the adsorption type, and a dynamic filtration experiment was performed to treat micro-polluted water. Results of the characterization analysis and the static adsorption experiment revealed that, compared with the smooth surface of unmodified garnet, the surface of modified garnet media was covered with Fe₂O₃, which showed a rough concave-convex structure with a specific area that was 2.44 times larger than that of unmodified garnet. The removal efficiency of organic matter after modification increased from 2.5–4.5% to 51.7–63.1%, and the adsorption capacity increased 11–24 times. The adsorption type of the modified garnet media belongs to the Langmuir and Freundlich adsorption mode, while that of the original media belongs to the Freundlich adsorption mode. Results of the dynamic filtration experiment revealed that the effect of modified garnet media on turbidity, COD_Mn, and UV₂₅₄ removal was better than that of unmodified garnet and traditional quartz sand.

使用高温煅烧来改性石榴石培养基。进行了Brunauer-Emmett-Teller（BET）测量，X射线衍射仪（XRD），扫描电子显微镜（SEM），zeta电位分析以及静电去除腐殖酸的实验，以比较未改性的石榴石和传统石英砂。进行改性前后介质的拟合吸附等温线以确定吸附类型，并进行动态过滤实验以处理微污染水。表征分析和静态吸附实验的结果表明，与未改性石榴石的光滑表面相比，改性石榴石介质的表面被Fe ₂ O ₃覆盖。，它显示出粗糙的凹凸结构，比表面积是未经修饰的石榴石的2.44倍。改性后有机物的去除率从2.5–4.5％提高到51.7–63.1％，吸附能力提高了11–24倍。改性石榴石介质的吸附类型属于Langmuir和Freundlich吸附模式，而原始介质的吸附类型属于Freundlich吸附模式。动态过滤实验的结果表明，改性石榴石介质对浊度，COD _Mn和UV ₂₅₄去除的效果优于未改性石榴石和传统石英砂。