The main factors affecting the adsorption performance of activated alumina desiccant are:
⑴ particle size: the smaller the particle size, the higher the adsorption capacity, but the smaller the particle size, the lower the particle strength, which affects its service life.
⑵ raw water pH value: when the pH value is greater than 5, the lower the pH value, the higher the adsorption capacity of activated alumina. ⑶ initial fluorine concentration of raw water: the higher the initial fluorine concentration, the larger the adsorption capacity.
(3) alkalinity of raw water: the concentration of bicarbonate in raw water is high, and the adsorption capacity will be reduced.
(4) chloride ion and sulfate ion. (5) effect of arsenic: activated alumina can adsorb arsenic in water. The accumulation of arsenic on activated alumina will reduce the adsorption capacity of fluorine ions, and it is difficult to elute arsenic ions during regeneration.