Radionuclide, Metal and Non-metal Levels in Percolated Water from Soils Fertilized with Phosphogypsum

Autor: Camilla Gonçalves Bof Silva, Vanusa Maria Feliciano Jacomino, Eliana Aparecida Nonato Knupp, Milton Batista Franco, Flávia Regina de Amorim, Kerley Alberto Pereira de Oliveira, Helena Eugênia Leonhardt Palmieri, Maria Helena Tirollo Taddei, Maria Celia Siqueira
Rok vydání: 2013
Předmět:
Zdroj: Journal of Radioanalytical and Nuclear Chemistry. 299:321-327
ISSN: 1588-2780
0236-5731
Popis: Phosphogypsum (PG) is a by-product of the phosphate fertilizer industry, which is produced by precipitation during the wet process of phosphate rocks. While commercial uses, in agriculture and in manufacturing gypsum board and Portland cement, consume less than a few percent of this by-product, the vast majority is disposed of on land in gypsum. In Brazil, three main industries are responsible for the production and storage of about 5.5 × 106 tons per year. PG may contain trace metals, non-metals, fluorides and natural radionuclides. Since, in Brazil, PG has been used for many years as soil amendment, it is important to know its availability, mainly in aquatic environments used for human consumption. In this case, more restrictive limits must be adopted. This work aimed to evaluate the mobility of metals in sand and clayey soils and, consequently, the contamination of drainage water through greenhouse-scale leaching and transport of toxic elements and radionuclides from soils fertilized with PG to crops. In general, it was observed that elemental concentrations were below the actual detection limit of the equipment for all conditions of interest, indicating a low mobility of the analyzed elements in the soil.
Databáze: OpenAIRE
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