Tag: Phosphogypsum

Fractionation and fluxes of metals and radionuclides during the recycling process of phosphogypsum wastes applied to mineral CO2 sequestration

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Abstract The industry of phosphoric acid produces a calcium-rich by-product known as phosphogypsum, which is usually stored in large stacks of millions of tons. Up to now, no commercial application has been widely implemented for its reuse because of the significant presence of potentially toxic contaminants. This work confirmed that up to 96% of the Read more about Fractionation and fluxes of metals and radionuclides during the recycling process of phosphogypsum wastes applied to mineral CO2 sequestration[…]

Microencapsulation of phosphogypsum into a sulfur polymer matrix: Physico-chemical and radiological characterization

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Abstract The aim of this work is to prepare a new type of phosphogypsum-sulfur polymer cements (PG-SPC) to be utilised in the manufacture of building materials. Physico-chemical and radiological characterization was performed in phosphogypsum and phosphogypsum-sulfur polymer concretes and modeling of exhalation rates has been also carried out. An optimized mixture of the materials was Read more about Microencapsulation of phosphogypsum into a sulfur polymer matrix: Physico-chemical and radiological characterization[…]

An assay on the effect of preliminary restoration tasks applied to a large TENORM wastes disposal in the south-west of Spain

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Abstract A large industrial wastes disposal site, where two phosphate rock processing plants release their wastes, located close to Huelva town (SW of Spain), has been partially submitted to restoration as a preliminary step in a possible decomissioning process. Due to the high natural radioactivity contents of these wastes, this repository is considered as a Read more about An assay on the effect of preliminary restoration tasks applied to a large TENORM wastes disposal in the south-west of Spain[…]

Radioactive impact in sediments from an estuarine system affected by industrial wastes releases

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Abstract A big fertilizer industrial complex and a vast extension of phosphogypsum piles (12 km2), sited in the estuary formed by the Odiel and Tinto river mouths (southwest of Spain), are producing an unambiguous radioactive impact in their surrounding aquatic environment through radionuclides from the U-series. The levels and distribution of radionuclides in sediments from Read more about Radioactive impact in sediments from an estuarine system affected by industrial wastes releases[…]

Enhancement of natural radioactivity in soils and salt-marshes surrounding a non-nuclear industrial complex

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Abstract The existence of a very high extension (about 1000 ha) of phosphogypsum piles, sited in the estuary formed by the mouths of the Tinto and Odiel rivers (SW Spain), produce a quite local, but unambiguous radioactive impact in the surrounding salt-marshes. In these piles the main by-product formed in the manufacture of phosphoric acid Read more about Enhancement of natural radioactivity in soils and salt-marshes surrounding a non-nuclear industrial complex[…]