16.3 Water treatment facilities make water safe for drinking Remove dirt particles and pathogens 3Ca(OH)2+ Al2(SO4)3- 2Al(OH)3+ 3 CaSO4 Slaked lime Slaked lime Aluminum Aluminum ulfate hydroxide Aluminum Aluminum suifate hydroxide (gelatinous) 8 ·的 83:8 Impurities in water Slaked lime and aluminum (2 Impurities captured Gelatinous aluminum ulfate added to water react by aluminum hydroxide hydroxide and impurities to form gelatinous aluminum as it settles. collect at bottom of basin hydroxide Figure 16.6 Slaked lime, Ca(OH)2, and aluminum sulfate, Al(SO/ react to form aluminum hydroxide, AlOH)3, which forms a gelatinous material used to capture impurities16.3 Water treatment facilities make water safe for drinking • Remove dirt particles and pathogens