Results 191 to 200 of about 7,633 (210)

The treatment of phosphogypsum leachate is more urgent than phosphogypsum

Environmental Research
Phosphogypsum(PG) is one of the typical bulk industrial solid wastes generated in the phosphate chemical industry. Due to its huge production volume and immature resource treatment technology, a large amount of PG can only be stored and disposed in slag yards, and its impact on the ecological environment is becoming increasingly significant during long-
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Environmental impacts of phosphogypsum

Science of The Total Environment, 1994
Abstract Phosphogypsum is an acidic by-product from the phosphate fertilizer industry. Large quantities are produced world-wide and it is estimated that by the year 2000 up to 280 million tonnes will be produced annually. Although phosphogypsum is mainly calcium sulfate dihydrate, it contains elevated levels of impurities which originate primarily ...
P.M. Rutherford, M.J. Dudas, R.A. Samek
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Phosphogypsum and clay mineral/phosphogypsum ceramic composites as useful adsorbents for uranium uptake

Applied Geochemistry, 2020
Abstract We analyzed the sorption capacity of phosphogypsum and clay mineral-based ceramic composites. Phosphogypsum is a waste by-product generated from apatite in the production process of phosphoric acid and phosphate fertilizers. On the one hand, the chemical composition of phosphogypsum poses a considerable problem to production plants due to ...
Marcin D. Syczewski, Andrzej Borkowski, Arkadiusz Gąsiński, Jan Raczko, Katarzyna Mordak, Igor Grądziel, null Magdalena Krzesicka, Maciej Kałaska, Rafał Siuda   +8 more
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Radium in Phosphogypsum Leachates

Journal of Environmental Quality, 1995
AbstractPhosphogypsum (PG) is an acidic by‐product of the phosphate fertilizer industry, and is produced in large quantities by the wet phosphoric acid process. Most PG is sluiced out to repositories, forming large stockpiles. Phosphogypsum is composed mainly of gypsum (Ca‐SO4·2H2O), but contains impurities of environmental concern such as F−, acids ...
P. M. Rutherford, M. J. Dudas, J. M. Arocena   +2 more
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Phosphogypsum chemistry under highly anoxic conditions

Waste Management, 2002
Phosphogypsum (PG), primary byproduct from phosphoric acid production, is accumulated in large stockpiles and occupies vast areas of land. Contaminants emanating from PG stacks can impact the environment including waterbodies. The major constraint for PG use in the environment is the presence of metals in high concentrations. Reduction of sulfate found
A, Carbonell-Barrachina, R D, DeLaune, A, Jugsujinda   +2 more
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Reduction of clinkerization temperature by using phosphogypsum

Journal of Hazardous Materials, 2006
Valorization of phosphogypsum as mineralizer in the burning of Portland cement clinker was studied in our laboratory. X-ray fluorescence, optical microscope technique and powder X-ray diffraction were then used to characterize the synthesized clinker and its raw mixture in terms of chemical composition and clinker mineralogical composition. The effects
Kacimi, Larbi, Simon-Masseron, Angélique, Ghomari, Abdelhamid, Derriche, Zoubir   +3 more
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Neutralization of Phosphogypsum for Use in Base Lining System of Phosphogypsum Dumping Yards

2023
The Geotechnical Engineering Journal of the SEAGS & AGSSEA, 54, 4, 12 ...
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Thermal behaviour of Moroccan phosphogypsum

Thermochimica Acta, 1997
Abstract In this article, we have examined the thermal behaviour of Moroccan phosphogypsum in the absence of additives. We have used very diversified techniques: thermogravimetric analysis (TGA), differential thermal analysis (DTA), infrared spectroscopy and X-ray diffraction. DTA has allowed us to point out several transformations. Moreover, TGA has
Saloua Sebbahi, Mohamed Lemine Ould Chameikh, Fatima Sahban, Jilali Aride, Larbi Benarafa, Larbi Belkbir   +5 more
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Investigation of radionuclides in phosphogypsum

Measurement Techniques, 1999
A determination was made of the content of uranium and226Ra in samples of phosphogypsum using gamma spectrometry.
M. B. Rajković, K. Karljiković-Rajić, G. T. Vladjisavlević, I. S. Ćirić (Yugoslavia)   +3 more
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Highly oriented arrangement of phosphogypsum crystals and structure of phosphogypsum/Polystyrene composites

Journal of Polymer Research, 2022
Jie Zhang, Han Lu, Dan Zeng, Dongye Meng, Jiajun Chen, Kun Liu, Jingyu Ran, Xiangdong Su   +7 more
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