... specific surface area and porosity, When used in water treatment, they behave a activated surface property, a ... and efficient filter material to increase the water yield, upgrade the water quality, and save chemicals and energy. ... in alkali,%≤ 1.5Soluble substanceNo any harmful elements containedProduct Sizes (mm): Φ0.5~1, Φ1~2, Φ2~3 , Φ ... Φ10~12, Φ13~15, Φ16~20, Φ21~60. Waste Water Treatment Product