... size:1-2mm, 2-3mm, 4-6mm Activated Alumina for defluorinating for fluoride removalActivated alumina has much micro-paths, so the ... to the absorbed molecular polarization, the attachment force is strong for water, oxide, acetic acid, alkali etc.Activated alumina ... 7≥160 6-8≥180 KA401: is for as adsorbentKA402: is for defluorinatingKA403: is for absorption in producing hydrogen perixide (H2O2)KA404 ...