... to the absorbed molecular polarization, the attachment force is strong for water, oxide, acetic acid, alkali etc.>Activated alumina defluorinated just as ... /cm3. It has high strength, low abrasion , no soften in water, no expansion, no powdery, no crack . It can widely used ... as H2S, SO2, HF and paraffin in the water gas, especially in the drinking water defluorination.2. sample charge : zero as your ...