Abstract
Calcium oxide, as a modified material, is used in pyro-modification of fly ash and the modified fly ash is used to treat phosphorus-containing wastewater, and treatment effect of modified fly ash on phosphorus-containing wastewater in different modification conditions is studied . Results show that good effect is obtained when the mass ratio of fly ash and calcium oxide ratio is 1:1, the roasting temperature is 950 °C, roasting time is 4h, and phosphorus removal rate can up to 92%. SEM pictures of raw fly ash and modified fly ash showed that modified fly ash particles become rough and porous, with a larger surface area, so it has good adsorption properties. Key words: Fly ash; Pyro-modification; Phosphorus-containing wastewater; Adsorption
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