Application of Activated Alumina in Water Treatment

Activated alumina can be used as high fluoride drinking water fluoride agent (fluorine removal ability), in addition to the fluorine agent, acid remover of transformer oil, oxygen is used as regeneration industry, textile industry, electronic industry, alkyl benzene production of alkane gas drying cycle, automation instrument air drying and fertilizer dryer dry, petrochemical and other industries, purifying agent (dew point can be up to 40 degrees), adsorption on dew point of air separation industry are stable up to 55 degrees below zero. It is a kind of high efficient desiccant with trace moisture. Ideal for thermal-free regeneration devices.

In addition to fluorine methods are roughly divided into the following:

(1) Adsorption filtration method;

(2) Membrane;

(3) Flocculation sedimentation method;

(4) Ion exchange method.

The main factors affecting the adsorption performance of activated alumina:

(1) Particle size: The smaller the particle size, the higher the adsorption capacity, but the smaller the particle size, the lower the particle strength, affecting its service life.

(2) 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.

(3) Initial fluoride concentration of raw water: the higher the initial fluoride concentration, the larger the adsorption capacity.

(4) Raw water alkalinity: the adsorption capacity will be reduced due to the high concentration of bicarbonate in the raw water. And then the chloride and sulfate ions.

(5) The effect of arsenic: activated alumina adsorption of arsenic in water, arsenic accumulation in activated alumina caused the reduction of fluoride ion adsorption capacity, and make the regeneration of arsenic elution is more difficult.