Phosphogypsum: potential uses and problems – a review

Saadaoui, Ezzeddine; Ghazel, Naziha; Romdhane, Chokri Ben; Massoudi, Nouman

doi:10.1080/00207233.2017.1330582

Cited by 174 publications

(84 citation statements)

References 32 publications

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“…The process was initiated by adding 12.5 g of PG to 25.0 mL of the aluminium-anodizing residue under magnetic stirring for 3 h in ambient pressure and temperature conditions [9,16]. The pH was 12.0 during the process.…”

Section: Synthesismentioning

confidence: 99%

“…Considering the results obtained, the PG analysed in this study does not generate major environmental risks, and therefore, no corrective measures should be applied. However, caution must be taken before any categorical assertion, because PG is heterogeneous, and its heavy metal and radionuclide contents depend on the depth at which the PG is found [39][40][41].…”

Section: Evolution Of Environmental Riskmentioning

confidence: 99%

“…This is an important drawback when it comes to reincorporating PG in the industrial production circuit in accordance with the principles of the clean circular economy [8]. Each year, nearly 200 Mt of PG are produced worldwide, but only 15% of pristine PG is re-used [9,10]. The properties of the material not only make it urgent to process and eventually remove the deposits entirely, but also offer many significant opportunities to recover valuable materials, thus supporting the circular economy and, as mentioned, adding value by CO 2 sequestration.…”

Section: Introductionmentioning

confidence: 99%

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Environmental Impact of Phosphogypsum-Derived Building Materials

Romero-Hermida

Alés

Hurtado

et al. 2020

IJERPH

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The aim of the present work was to characterize the products obtained from the treatment of phosphogypsum residue by means of two recovery routes, and also to evaluate the concentrations of heavy metals and radionuclides in the materials obtained and their leachates. In this way, it is possible to determine how the most hazardous components of phosphogypsum behave during procedures until their stabilization through CO2 fixation. This study provides an initial estimate of the possibilities of reusing the resulting products from a health and safety risk standpoint and their potential polluting capacity. The phases resulting from the transformations were controlled, and the behaviour of standard mortars manufactured from the resulting paste lime was studied. In all cases, an additional control of the leachate products was performed.

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Section: Synthesismentioning

confidence: 99%

Section: Evolution Of Environmental Riskmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Environmental Impact of Phosphogypsum-Derived Building Materials

Romero-Hermida

Alés

Hurtado

et al. 2020

IJERPH

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“…The use of gypsum should be explored especially in the hot and dry regions such as North Africa and Sahel in order to exploit its heat and sound insulation properties in such areas. Phospho-gypsum can be used in the brick and cement industry, and in road construction [32].…”

Section: Mineral Bindersmentioning

confidence: 99%

Innovation potentials for construction materials with specific focus on the challenges in Africa

et al. 2020

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Africa is urgently in need of adequate basic infrastructure and housing, and it is one of the continents where massive construction activities are on the rise. There is a vast variety of potentially viable resources for sustainable construction on the continents, and consequently, the continent can bring innovative, greener technologies based on local sources effectively into practice. However, unlike established concrete constituents from industrialised countries in the global North, most of the innovation potentials from the African continent have not yet been the focus of intensive fundamental and applied research. This clearly limits the implementation of more sustainable local technologies. This paper presents a case for the need to first appreciate the rich diversity and versatility of the African continent which is often not realistically perceived and appreciated. It discusses specific innovation potentials and challenges for cementitious materials and concrete technology based on local materials derived from sources on the African continent. The unique African materials solutions are presented and discussed, from mineral binders over chemical admixtures and fibres to reinforcement and aggregates. Due to the pressing challenges faced by Africa, with regards to population growth and urbanisation, the focus is not only put on the technological (durability, robustness and safety) and environmental sustainability, but also strongly on socio-economic applicability, adaptability and scalability. This includes a review of alternative, traditional and vernacular construction technologies such as materials-saving structures that help reducing cementitious materials. Eventually, a strategic research roadmap is hypothesised that points out the most relevant potentials and research needs for quick implementation of more localised construction materials.

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“…One solution for recycling NORMs such as fly ash and phosphogypsum is the synthesis of belite-sulfoaluminate cement clinkers (7,11,13,14). Commonly, the concentration of radionuclides originating from such residues is decreased in the resulting products due to the dilution effect (26,27). It is also expected that the trend of NORM recycling will continue with their use not only in concrete, but also in cement and clinker (26).…”

Section: Introductionmentioning

confidence: 99%

Use of fly ash and phosphogypsum for the synthesis of belite-sulfoaluminate clinker

et al. 2019

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Fly ash and phosphogypsum were used as Naturally Occurring Radioactive Materials (NORM) by-products for the synthesis of belite-sulfoaluminate clinkers. The influence of raw mixture composition and firing temperature was investigated. Clinkers and cements were examined by X-ray powder diffraction and scanning electron microscopy with energy dispersive X-ray spectroscopy. The compressive strength of the cements was determined after 28 days. Clinker phases identified included ye’elimite, ß-phase of belite, ternesite and gehlenite, while the main hydration product of the cement pastes was ettringite. The results showed that belite-sulfoaluminate cements can be fabricated with a compressive strength of 45.9 N/mm2 by firing the raw mixture (70 wt.% marl, 10 wt.% bauxite and 20 wt.% phosphogypsum) at a temperature of 1320°C/1h.

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Phosphogypsum: potential uses and problems – a review

Cited by 174 publications

References 32 publications

Environmental Impact of Phosphogypsum-Derived Building Materials

Environmental Impact of Phosphogypsum-Derived Building Materials

Innovation potentials for construction materials with specific focus on the challenges in Africa

Use of fly ash and phosphogypsum for the synthesis of belite-sulfoaluminate clinker

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