Treatment of phosphogypsum waste using suitable organic extractants
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The reduction in concentration of radionuclides from PG was investigated and using the desired organic extractant under optimum conditions for treatment of the PG waste leads to obtain a decontaminated product that can be safely used in many industrial applications.Abstract:
Phosphogypsum (PG) is a residue of the phosphate fertilizer industry that has relatively high concentrations of harmful radioactive materials. The reduction in concentration of the radionuclides from PG was investigated. The removal process is based on leaching of radionuclides using suitable organic extractants. The studied radionuclides were 226Ra, 210Pb, 238U and 40K. The factors affect the leaching process such as type of leaching materials, contact time, concentration of the desired solvent, liquid to solid ratio, and temperature were studied. Based on the experimental results, about 71.1, 76.4, 62.4, and 75.7% of 226Ra, 210Pb, 238U and 40K respectively were successfully removed from the PG. The reduction in the concentration of radionuclides was accompanied by reduction in the concentration of rare earth elements (∑REE) equals to 69.8%. Using the desired organic extractant under optimum conditions for treatment of the PG waste leads to obtain a decontaminated product that can be safely used in many industrial applications.read more
Citations
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Journal ArticleDOI
Towards zero-waste valorisation of rare-earth-containing industrial process residues: a critical review
TL;DR: In this paper, the authors discuss the possibilities to recover rare earths from industrial waste streams, which contain only low concentrations of rare-earth elements, but are available in very large volumes and could provide significant amounts of rare Earths.
Journal ArticleDOI
Phosphogypsum as a construction material
TL;DR: In this article, a review of the earlier studies which reused PG as a construction material has been conducted and the effect of PG on some properties of the matrix such as workability, unit weight, mechanical strength and durability has been reviewed and discussed.
Journal ArticleDOI
The story of rare earth elements (REEs): Occurrences, global distribution, genesis, geology, mineralogy and global production
Nimila Dushyantha,Nadeera Batapola,I.M.S.K. Ilankoon,Sudath Rohitha,Ranjith Premasiri,Bandara Abeysinghe,Nalin Prasanna Ratnayake,Kithsiri Dissanayake +7 more
TL;DR: In this article, rare earth (REE) deposits are classified on the basis of their genetic associations, mineralogy and form of occurrences, and their genesis, chronology and mineralogy are discussed.
Journal ArticleDOI
Recovery of rare earth elements from phosphate rock by hydrometallurgical processes - A critical review
Wu Shengxi,Liangshi Wang,Longsheng Zhao,Patrick Zhang,Hassan El-Shall,Brij M. Moudgil,Xiaowei Huang,Lifeng Zhang +7 more
TL;DR: In this paper, an overview of achievements aiming at solving the challenges of rare earth elements (REE) recovery from phosphate rock is given, and recommendations to promote the development of REE recovery technologies from phosphate rocks are provided.
Journal ArticleDOI
Phosphogypsum: potential uses and problems – a review
TL;DR: The concentrations of these elements vary between the regions and the processes used, all of which require particular and specific follow-up after the release of PG and during its use.
References
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Perry's Chemical Engineers' Handbook
TL;DR: In this paper, conversion factors and mathematical symbols are used to describe conversion factors in physical and chemical data and Mathematical Symbols are used for converting, converting, and utilising conversion factors.
Perrys chemical engineers handbook
TL;DR: Perry's Chemical Engineers' Handbook as mentioned in this paper is a free download pdf for chemical engineering applications, from the fundamentals to details on computer applications and control, and it can be found in any computer science course.
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Chemical Engineers' Handbook
TL;DR: The Chemical Engineers handbook as mentioned in this paper, Chemical engineers handbook, Chemical engineer handbook, Chemical engineers Handbook, Chemical Engineering handbook and Chemical Engineers Handbook, 2007.2.1.