The tap water purification steps are Qianjiang disinfection and Gong Ming household activated carbon. with the purpose of

Settling to make insoluble solid particles in water, removing insoluble solid impurities in water by filtration, removing colored and odorous impurities in water by adsorption, and killing bacteria in water by disinfection; Among them, when the activity adsorbs colored and odorous impurities in water, it can also filter out some solid insoluble substances.

So, the answer is: filtering; Adsorption; Filter.