Phosphogypsum recycling: New horizons for a more sustainable road material application

Amrani, Mustapha; Taha, Yassine; Kchikach, Azzouz; Benzaazoua, Mostafa; Hakkou, Rachid

doi:10.1016/j.jobe.2020.101267

Cited by 87 publications

(46 citation statements)

References 8 publications

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“…In particular, if more stringent environmental regulations have been implemented in producing countries, the amount of phosphogypsum reaching water bodies should be much lower. However, phosphogypsum has also been studied as a potential resource pool, with recent studies suggesting recycling it in the construction industry ( Campos et al, 2017 ; Amrani et al, 2020 ). Agriculture use of phosphogypsum to improve soil structure and crop yield, reduce runoff and decrease soil erosion has also been examined, with some mixed results concerning the safety of phosphogypsum application to soils ( Canova et al, 2018 ).…”

Section: Resultsmentioning

confidence: 99%

Global phosphorus supply chain dynamics: Assessing regional impact to 2050

Nedelciu

Ragnarsdottir

Schlyter

et al. 2020

Global Food Security

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Phosphorus (P) availability is essential for global food security. A system dynamics model running from 1961 to 2050 was built for this study, linking global P supply to social, economic and environmental dynamics at regional level. Simulation results show that phosphate rock (PR) production needs to double by 2050 compared to present levels, in order to match regional P requirements. South Asia, Latin America and the Caribbean, and Sub-Saharan Africa are regions highly dependent on phosphate imports, yet it is here that most of the population growth and future P requirement will occur. Climate impact, eutrophication and phosphogypsum production are some of the main negative environmental dynamics that are becoming increasingly challenging in the coming decades.

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Section: Resultsmentioning

confidence: 99%

Global phosphorus supply chain dynamics: Assessing regional impact to 2050

Nedelciu

Ragnarsdottir

Schlyter

et al. 2020

Global Food Security

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show abstract

“…The use of phosphogypsum for the production of composite materials based on asphaltic binders has been common, as well as in road construction for the construction of road bases and as an additive to asphalt concrete mixtures [34,[48][49][50][51][52]. The advantage of such use of phosphogypsum is the following [53]: roads with the use of phosphogypsum are 30% cheaper than roads with the use of traditional technologies and can be laid in marshy areas.…”

Section: Phosphogypsum Recycling In Various Industry Fieldsmentioning

confidence: 99%

Phosphogypsum Recycling: A Review of Environmental Issues, Current Trends, and Prospects

et al. 2021

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The problem of recycling and storage of phosphogypsum is topical for many countries around the world, as it is associated with environmental problems of pollution of water bodies, land, and atmosphere. Therefore, this paper analyzes the directions of phosphogypsum recycling and possible alternatives to its use. The main disadvantages of the existing methods of phosphogypsum processing were identified and trends in this waste management were also considered. Through the VOSviewer programme, a visualization of cluster interconnections was carried out in research publications of various fields of phosphogypsum utilization. Five clusters were formed: a red cluster—phosphogypsum recycling in the construction industry; green cluster—radiation pollution problem of phosphogypsum and phosphate fertilizers; yellow cluster—monitoring migration of phosphogypsum components in the ecosystem, with the mobile forms of heavy metals and their inflow into aquifers from phosphogypsum dumps; blue cluster—use of phosphogypsum in agriculture as an ameliorant and a component of fertilizer; and a purple cluster—the impact of phosphogypsum on microorganisms, particularly in bioremediation processes. Under the proposed integrated biochemical approach, the use of various bioprocesses of phosphogypsum recovery from waste dumps and implementation of new biotechnological solutions for processing phosphorus raw materials are presented.

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“…It can be observed from Figure 2 that the foam volume demonstrates negative effects on the water resistance of phosphogypsum. This is attributed to the fact that the increased diameter and number of pores induced by the increased foam volume make more water enter the phosphogypsum, thus leading to the destruction of its structures and the decline in its mechanical strength [24,25]. However, the addition of cement results in increasing the water resistance coefficient of specimens due to the improved compactness of the phosphogypsum, thus preventing the immersion of water and improving the water resistance coefficient of phosphogypsum [26,27].…”

Section: Water Resistancementioning

confidence: 99%

Research on the Thermal Conductivity and Water Resistance of Foamed Phosphogypsum

2021

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Phosphogypsum is a kind of solid waste which pollutes the environment without reasonable treatment. The application of phosphogypsum in the field of building materials provides an ideal method to solve this problem. Meanwhile, the phosphogypsum mixed with foam can be used for the thermal insulation of wall materials. This paper aims to study the influence of foam volume and cement content on the thermal conductivity, water resistance coefficient and the mechanical strengths of foamed phosphogypsum. The volume of foam in this study ranged from 0% to 60%. Moreover, the influences of humidity and cement content on the mechanical strengths of phosphogypsum are investigated. Scanning electron microscope and the mercury intrusion porosimetry are used for the microscale research and analysis. Results indicate that the relationships between the parameters (thermal conductivity, water resistance coefficient and mechanical strengths) and foam volume fit well with a negatively correlated linear function. The addition of cement can improve the compactness of phosphogypsum and decrease the diameter and volume of pores. Therefore, the thermal conductivity, water resistance coefficient and mechanical strengths of phosphogypsum are increased by the addition of cement.

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Phosphogypsum recycling: New horizons for a more sustainable road material application

Cited by 87 publications

References 8 publications

Global phosphorus supply chain dynamics: Assessing regional impact to 2050

Global phosphorus supply chain dynamics: Assessing regional impact to 2050

Phosphogypsum Recycling: A Review of Environmental Issues, Current Trends, and Prospects

Research on the Thermal Conductivity and Water Resistance of Foamed Phosphogypsum

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