Product introduction: The activated alumina defluorination agent is a white spherical particle with good physical properties, high strength, non-toxic and tasteless. It remains soft, does not expand and does not crack when immersed in water. It is completely reliable, easy to regenerate and has a long service life. The water purified by the defluorination agent can meet the national drinking water hygiene standard. The activated alumina defluorination agent is a molecular adsorbent with huge specific surface area. The fluoride removal by activated alumina is similar to that of anion exchange resin, but its selectivity for fluoride ions is greater than that of anion resin. When the pH value of raw water is low, the fluorine removal capacity is high, which is greater than 2.1mg/g, the price is lower than that of synthetic resin, and the particle size is small, which can make the surface area of the product relatively large, generally 1-3mm. When used, it has a large contact area with water. The specific surface area index is more than 300m2 / g, and the number of micropores is huge, which can ensure strong adsorption capacity and high fluorine removal capacity for fluorine ions in water.