Effect of strong acids on red mud structural and fluoride adsorption properties

Liang, Wentao; Couperthwaite, Sara J.; Kaur, Gurkiran; Chen, Yan; Johnstone, Dean W.; Millar, Graeme J.

doi:10.1016/j.jcis.2014.02.019

Cited by 97 publications

(37 citation statements)

References 33 publications

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“…Red mud consist of hematite (Fe2O3), gibbsite (Al(OH)3), boehmite (γ-AlO(OH)), anatase (TiO2) and quartz (SiO2). These result, according with XRD pattern of hematite at 2θ = 26°, 40°, 47°, 58°, 64°; gibbsite at 2θ = 20°, 24°; boehmite at 2θ = 18°, 33°, 45°, 58°; anatase at 2θ = 28°, 55°; quartz at 2θ = 21°, 26° , and 50° [17]. Fig.…”

Section: Xrd (X-ray Diffraction)supporting

confidence: 56%

Extraction of Alumina from Red Mud for Synthesis of Mesoporous Alumina by Adding CTABr as Mesoporous Directing Agent

et al. 2018

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Section: Xrd (X-ray Diffraction)supporting

confidence: 56%

Extraction of Alumina from Red Mud for Synthesis of Mesoporous Alumina by Adding CTABr as Mesoporous Directing Agent

et al. 2018

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“…Acidification methods improve the removal capacity of red mud of water contaminants by dissolving the calcium and acidsoluble salts, which in turn create new cavities and increase the surface area. Acids used for this purpose include concentrated hydrochloric acids, dilute hydrogen chloride or nitric acids [11,13,[27][28][29]. However, contrasting results have also been reported with regards to acid treatment, which was found to dissolve a portion of cancrinite and another type of compounds responsible for adsorption sites [30].…”

Section: Modifications Of Red Mud For Adsorption Processesmentioning

confidence: 99%

Application of modified red mud in environmentally-benign applications: A review paper

Joseph

Taufiq‐Yap

Krishnan

et al. 2019

Environmental Engineering Research

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Red mud (RM) is a waste product that results from bauxite refining via the Bayer process. Its disposal remains an issue which raises significant environmental concerns, particularly if disposed on land or water bodies. Much research has been done on the use of red mud for environmentally-benign applications such as wastewater treatment, catalysis, the production of construction materials and glass ceramics, and for the recovery of metals. This paper reviews the current efforts made in the utilization of red mud as a valuable industrial by-product, which in turn should minimize its harmful impact on the environment. This detailed review compiles and highlights a variety of novel applications of modified red mud as a coagulant, an adsorbent for wastewater treatment, as well as, its use in catalytic processes and in building materials. The physico-chemical properties of red mud can be tuned by a range of treatment methods include acidification, neutralization and heat treatment. As revealed from the literature reviewed, modifications on red mud for the removal of various types of contaminants have shown promising results. However, further amendment and modifications on red mud are needed to utilize this industrial waste in many other industrial applications.

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“…Using red mud has both environmental and economic significance [10][11][12]. During the last few decades, red mud has been applied for various purpose, such as adsorbent for water and gas treatment [13][14][15][16][17][18][19], catalyst for certain reactions [20][21][22][23][24][25], and material for building construction and ceramics [26][27][28]. At present, red mud is also used in metallurgy.…”

Section: Introductionmentioning

confidence: 99%

Effect of gas composition and temperature on reduction characteristic in red mud-coal composite pellets

et al. 2019

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Original scientific paper https://doi.org/10.2298/TSCI181123144MThe disposal of red mud, which is the by-product obtained from alumina production, has brought about environmental pollution because of its caustic nature as well its metal and alkaline contents. Red mud-coal composite pellets were directly reduced to deal with red mud. The influences of reduction temperature and gas composition on the reaction were studied. Experiment results indicated that the optimum reaction parameters were a temperature of 1100 °C and an H 2 atmosphere. Reduction degrees in H 2 and CO atmospheres were significantly higher than those in N 2 atmosphere. Reduction did not strictly follow the Fe 2 O 3 → Fe 3 O 4 → FeO → Fe sequence in N 2 atmosphere, and this phenomenondid not occur in H 2 atmosphere. This gas-solid combination reduction process is appropriate for recovering Fe from Bayer red mud. Meanwhile, the microstructure and phase transformation of the reduction process were investigated via scanning electron microscopy and X-ray diffraction.

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Effect of strong acids on red mud structural and fluoride adsorption properties

Cited by 97 publications

References 33 publications

Extraction of Alumina from Red Mud for Synthesis of Mesoporous Alumina by Adding CTABr as Mesoporous Directing Agent

Extraction of Alumina from Red Mud for Synthesis of Mesoporous Alumina by Adding CTABr as Mesoporous Directing Agent

Application of modified red mud in environmentally-benign applications: A review paper

Effect of gas composition and temperature on reduction characteristic in red mud-coal composite pellets

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