Innovative application for bauxite residue: Red mud-based inorganic polymer spheres as pH regulators

Novais, Rui M.; Carvalheiras, João; Seabra, M.P.; Pullar, Robert C.; Labrincha, J.A.

doi:10.1016/j.jhazmat.2018.06.047

Cited by 59 publications

(21 citation statements)

References 31 publications

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“…The influence of the foaming agent type [81,82] and concentration [83,84], water content [63,85], binder nature [86,87], curing temperature [35,88], among other influential parameters (e.g. mixture composition) [89,90], on the properties of geopolymer foams have been studied.…”

Section: Thermal and Acoustic Insulatorsmentioning

confidence: 99%

Geopolymer foams: An overview of recent advancements

Novais

Pullar

Labrincha

2020

Progress in Materials Science

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191

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Section: Thermal and Acoustic Insulatorsmentioning

confidence: 99%

Geopolymer foams: An overview of recent advancements

Novais

Pullar

Labrincha

2020

Progress in Materials Science

Self Cite

191

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“…A lot of research has been conducted on red mud and bauxite tailings, which are mainly used for the production of construction materials [3][4][5] , filling materials [6,7] , refractory materials [8] , functional materials [9][10][11] , etc. However, there are still problems such as low value-added products or high process energy consumption or limited solid waste consumption, resulting that most of produced red mud and bauxite flotation tailings are stored in landfills [12] . Based on the principle of complementary composition among multiple solid wastes, a study was conducted on the preparation of polymeric aluminium ferric sulfate flocculant (PAFS) from red mud and bauxite tailings, aiming to promote the reduction and resourceization of solid wastes in aluminum industry and to achieve the purpose of turning waste into treasure.…”

Section: Introductionmentioning

confidence: 99%

Preparation of polymeric aluminum ferric sulphate from waste residue of aluminum industry

Yanmei

2021

E3S Web Conf.

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Polymeric aluminum ferric sulphate(PAFS) was prepared from high-sulfur bauxite flotation tailings and red mud by roasting, acid leaching and polymerization. The effects of leaching temperature, leaching time, liquid-solid ratio on the leaching rate of Al3+ and Fe3+were investigated. The optimal leaching conditions are as follows: leaching temperature 100℃, leaching time 90 min, sulfuric acid concentration 4.5mol/L and liquid-solid ratio 5 mg/L. Infrared spectroscopy and X-ray diffraction analysis was carried out on the PAFS prepared under the optimum process parameters. The characterization of PAFS shows that the synthesized PAFS had polymeric aluminum, iron and hydroxyl structures. Wastewater disposal test of synthetic PAFS shows that the removal rates of COD, turbidity and chromaticity are 45.61%, 75% and 94.18%, respectively.

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“…It has a much lower carbon footprint than the technology of manufacturing traditional construction materials [1,3]. The geopolymer synthesis also enables one to use waste, such as mining tiles or industrial by-products as a raw material for manufacturing new products in low energy and low emission processes [4][5].…”

Section: Introductionmentioning

confidence: 99%

Impact of Flax Fiber Reinforcement on Mechanical Properties of Solid and Foamed Geopolymer Concrete

Korniejenko

Łach

Hebdowska-Krupa

et al. 2020

Adv. technol. innov.

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The main objective of this study is to develop the advanced composites for civil engineering applications as material for the building industry, especially for an insulation purpose. The research processes include several steps. Firstly, the prototype elements, such as bricks and elevation elements were performed from eco-friendly composite -flax fiber reinforced geopolymer. The elements were designed to take into consideration for environment. Geopolymers are environmentally friendly, sustainable, and resource efficient, including energy demand. Next, the wall was built from these elements and exposed during the three months in a relevant environment. The main conclusion of the research is that the kind of fibers is important for the mechanical properties of the composite, including the fact that for those different fibers could be more beneficial for different raw materials, giving higher strength properties. The significant influence on the mechanical properties of the composites has the adhesion between fiber and material used as a matrix. The adhesion depends among others on the previous treatment of the fibers.

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Innovative application for bauxite residue: Red mud-based inorganic polymer spheres as pH regulators

Cited by 59 publications

References 31 publications

Geopolymer foams: An overview of recent advancements

Geopolymer foams: An overview of recent advancements

Preparation of polymeric aluminum ferric sulphate from waste residue of aluminum industry

Impact of Flax Fiber Reinforcement on Mechanical Properties of Solid and Foamed Geopolymer Concrete

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