Conversion of phosphogypsum to sodium sulfate and calcium carbonate in aqueous solution

Using phosphogypsum (pg) as a raw material for the production of valuable products is interesting. in this work we present the wet chemical conversion of phosphogypsum to calcium carbonate and sodium sulfate. calcium carbonate can be used in the fields of the industry (cement,paper...) and the environment,while sodium sulfate can be used in the glass industry,detergents... the reaction for chemical decomposition of phosphogypsum is made at room temperature in aqueous solution and studied at various concentrations and times. according to the obtained results,we concluded that the reaction is complete only after half an hour. it also presents other advantages: it is reproducible,ecological and not expensive.