Harmless treatment technology of phosphogypsum: Directional stabilization of toxic and harmful substances

Recycling phosphogypsum in road construction materials and associated environmental considerations: A review

“…The use of calcium carbide slag as an alkali neutraliser for PG has the advantages of low economic cost, simple process, and high feasibility. However, researchers found that the reaction rate of calcium carbide slag was higher than that of lime, but the reaction effect was significantly lower than that of lime ( Wu et al., 2022b ).…”

Synthesis of reticular long-carbon-chain polysiloxane and its hydrophobic modification of phosphogypsum-based materials

“…1,2 The main component of phosphogypsum is calcium sulphate dihydrate, which contains soluble and insoluble impurities and radioactive substances, inhibiting its efficacy as an acidic solid waste with a low utilization rate. 3,4 The accumulation of phosphogypsum not only occupies a large amount of land but also causes serious environmental pollution. Therefore, it is urgent to realize the high value-added utilization of phosphogypsum.…”

Effect of mixed cation acetate electrolyte on synthesis of α‐hemihydrate gypsum from phosphogypsum

“…2,3 Due to the complex impurities, such as phosphorus, fluorine, residual acid, organic matter, and even heavy metals, it is difficult to recycle it. [4][5][6][7] Especially, the harmful substances existing in the gypsum crystals will be slowly released during the dissolution process, 8,9 seriously affecting the application value of materials. 10 At present, the preparation of α-hemihydrate gypsum (α-HH) from PG has been widely recognized in the field of building materials, α-HH has good workability, and related products have excellent performance in strength, hardness, biocompatibility, and other aspects, with obvious advantages of high value-added.…”