Radiological, chemical and morphological characterizations of phosphate rock and phosphogypsum from phosphoric acid factories in SW Spain

Rentería-Villalobos, Marusia; Vioque, I.; Mantero, Juan Carlos; Manjón, G.

doi:10.1016/j.jhazmat.2010.04.116

Cited by 107 publications

(34 citation statements)

References 35 publications

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“…The major impurities in PG were SiO 2 , P 2 O 5 , Fe 2 O 3 , Al 2 O 3 and Na 2 O, and, to a lesser extent, K 2 O and TiO 2 . It is important to note that P 2 O 5 was also found in PG (0.96 wt.%), which remains in PG later the washing in the industrial process [40]. Fig.…”

Section: Characterization Of Raw Materialsmentioning

confidence: 85%

“…Neither 226 Ra, 234 Th, 232 Th, 40 K nor 210 Pb were detected in the leachates (i.e., the concentrations were below the 1 and 3 Bq l −1 detection limits), thus providing leaching coefficients of <1%. Only the results for 238 U and 210 Po (which were measured using more sensitive techniques) are therefore discussed.…”

Section: Accelerated Leach Testmentioning

confidence: 94%

“…210 Po was determined by alpha spectrometry, and 238 U by laser phosphorimetry. 226 Ra, 234 Th, 232 Th, 40 K and 210 Pb were determined by gamma spectroscopy. The radionuclide concentrations of the buffers used in the initial concrete samples (before the leach tests) were also determined, and found to be close to the detection limits of the methods employed.…”

Section: Accelerated Leach Testmentioning

confidence: 99%

See 2 more Smart Citations

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

López

Gázquez

Bolı́var

et al. 2011

Journal of Hazardous Materials

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Section: Characterization Of Raw Materialsmentioning

confidence: 85%

Section: Accelerated Leach Testmentioning

confidence: 94%

Section: Accelerated Leach Testmentioning

confidence: 99%

See 1 more Smart Citation

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

López

Gázquez

Bolı́var

et al. 2011

Journal of Hazardous Materials

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“…Major impurities are SiO2, Fe2O3, Al2O3 and Na2O, and, to a lesser extent, K2O and TiO2. It is important to note that 0.95 wt.% P2O5, which remains after the material washing, was also found [16]. In addition, in Table 1 is also shown its radioactive characterization [15].…”

Section: Introductionmentioning

confidence: 89%

Valorization of phosphogypsum waste as asphaltic bitumen modifier

Cuadri

Navarro

García‐Morales

et al. 2014

Journal of Hazardous Materials

116

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The accumulation of phosphogypsum wastes from the fertilizer industries, which remain in regulated stacks occupying considerable land resources, is causing significant environment problems worldwide. In that sense, the scientific community is being pressured to find alternative ways for their disposal. In this research, we propose a novel application for phosphogypsum wastes, as a modifier of bitumen for flexible road pavements. Viscous flow tests carried out on bitumen modified with a phosphogypsum waste and doped with sulfuric acid demonstrated an extraordinary increase in viscosity, at 60 ºC, when compared to a counterpart sample which had been modified with gypsum, the main component of phosphogypsum. Similarly, a significant improvement in the viscoelastic response of the resulting material at high temperatures was also found. FTIR (Fourier transform infrared spectroscopy) scans provided evidences of the existence of chemical reactions involving phosphorus, as revealed by a new absorption band from 1060 to 1180 cm -1 , related to C−O−P vibrations. This result points at phosphorus contained in the phosphogypsum impurities to be the actual "modifying" substance. Furthermore, no C-O-P band was observed in the absence of sulfuric acid, which seems to be the "promoting" agent of this type of bond.

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“…PG is generally located in coastal areas near a phosphate fertilizer plant, where it occupies large space and causes many environmental damages. Renteria-Villalobos et al (2010) reported the radiological, chemical and morphological characterizations of PG in order to evaluate the behavior of toxic elements. They found that toxic elements (Barium; Ba, Cadmium; Cd, Copper; Cu, La; Lanthanum, Lead; Pb, Selenium; Se, and Strontium; Sr) are not distributed homogeneously within PG, and could easily be mobilized by leaching or erosion.…”

Section: Introductionmentioning

confidence: 99%

Environmental Impact of Phosphogypsum on the Ecotoxicity of A. salina, D. magna, O. latipes, and S. capricornutum

Park¹,

Han²,

Lee³

et al. 2016

Journal of Soil and Groundwater Environment

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The objective of this study was to determine the feasibility of recycled phosphogypsum (PG) as an embankment material with soil by performing batch and column ecotoxicity experiments. A. salina, D. magna, O. latipes and S. capricornutum were selected for the experiment. The effective concentration (EC 50 ) of D. magna was the lowest value, 1.29 mg/L. The survival rates of A. salina, D. magna and O. latipes were more than 90% in the presence of PG leachate in the column test. The toxicity unit (TU) for the organisms was less than 1, indicating that no significant ecotoxicity effect was found. These findings suggested that PG could be recycled for use as an embankment and landfill material with soil.

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Radiological, chemical and morphological characterizations of phosphate rock and phosphogypsum from phosphoric acid factories in SW Spain

Cited by 107 publications

References 35 publications

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

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

Valorization of phosphogypsum waste as asphaltic bitumen modifier

Environmental Impact of Phosphogypsum on the Ecotoxicity of A. salina, D. magna, O. latipes, and S. capricornutum

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