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A Novel Method of Synthesizing Polymeric Aluminum Ferric …
3.8. Properties of the Red Mud-Based Ceramsite. Preparation of high-strength ceramsite provided a novel method for efficient utilization of ARM. Not only can it reduce secondary pollution caused by ARM emissions, it can also be used as an adsorption material. Mechanical strength is a key indicator that affects its popularization and application ...
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Red Mud from the Aluminium Industry: Production, …
Similarly, in January 2018, another disaster occurred in Belem, Brazil. A powerful rain caused red mud storage overflows, contaminating soil and threatening drinking water by high levels of lead and aluminium [55]. The red mud also can be converted into a dry cake as pressure filters reduce its moisture content.
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[Pollution Source Apportionment of Heavy Metals in Cultivated …
In order to explore the characteristics and sources of heavy metal pollution in cultivated soil around a red mud yard in Chongqing, the content and spatial distribution characteristics of eight heavy metal elements （Cd, Cr, Hg, Ni, Pb, As, Cu, and Zn） in the soil were analyzed, and the single factor pollution index method and Nemerow …
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Recovery of Iron and Titanium in Red Mud with Secondary …
disposal method for solid waste.3–6 Red mud con-tains aluminum, iron and titanium resources. Its resource utilization can be divided into two types, manufacturing building materials and recovering iron. Mineral filler and brick are the main building materials manufactured from red mud. Red mud can be utilized as the mineral filler in mineral
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Red mud is piling up. Can scientists figure out what to …
The company estimates that the red mud from a single aluminum refinery can lock up 70,000 tons of CO 2 per year, equivalent to taking more than 15,000 cars off the road. Yet these glimmers of progress could fade, …
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Preparation and property studies of ferric sulfoaluminate
The Bayer red mud (RM) and phosphogypsum (PG) accumulation have caused significant environmental contamination. However, practical and effective resource utilization technologies are still lacking currently. This work aims to develop ferric sulfoaluminate cement (FSAC) employing low-cost materials including Bayer red mud, phosphogypsum, and other …
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Environmental and Radiation Concerns of Red Mud
Red mud, also known as bauxite residue, is an insoluble byproduct generated from the extraction of alumina from bauxite during the Bayer process (Fig. 1), a crucial step in the manufacturing of aluminum. Highly alkaline and difficult to …
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Red mud-based catalysts for the catalytic removal of typical air
Red mud, as a solid waste produced during the alumina production, can cause severe eco-environmental pollution and health risks to human.Therefore, the resourcing of this type of solid waste is an effective way for the sustainable development.
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Study on the removal of iron (II) and manganese (II) in
Red mud is an environmental burden during the alumina production process. To mitigate the hazards associated with red mud storage, this study investigated the utilization of alkaline red mud as a treatment agent for acidic mine drainage (AMD) with high concentrations of Fe(II) and Mn(II). This study explored the influence of reaction times, addition amounts of red …
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Spatial Characteristics and Risk Assessment of Heavy Metals
The purpose of this study was to investigate the distribution pattern, pollution status and potential ecological risk of Cr, Co, Ni, Cu, As, Cd, Sb, and Pb in soils and dominant plants around an abandoned red mud (RM) slag yard in Southwestern China. Soils exhibited representative enrichment and combination characteristics of these metals compared to the …
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Understanding red mud pollution: causes, impacts, and mitigation
Red mud pollution, is bauxite residue. It is a toxic byproduct left over when alumina (aluminium oxide) is extracted from its ore, bauxite, in order to produce aluminium metal in the …
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Characterization and Applications of Red Mud, an Aluminum …
Characterization and Applications of Red Mud, an Aluminum Industry Waste Material, in the Construction and Building Industries, as well as Catalysis. Amin Al-Fakih, ... RM can be used as an efficient active catalyst to synthesize organic molecules and reduce air pollution, which not only makes use of solid waste but also lowers the price of the ...
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Experimental Investigation on Red Mud from the Bayer Process …
Open-air storage yard of red mud. Following alumina production processes, red mud can be categorized into red mud from the Bayer process, red mud from the sintering process, and red mud from the combined process [10,11].There are some differences in the physical properties and chemical compositions of red mud produced from different bauxite sources and alumina …
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Disposal – Red Mud Project
D. Luo and J. Liu, "New process of utilizing red mud from aluminum treating plant to produce high quality direct-reduction iron", China Mining 11 (2002), pp. 50–53 (in Chinese) J. Hyuna, S. Endoha, K. Masudaa, H. Shinb, H. Ohyaa, "Reduction of chlorine in bauxite residue by fine particle separation", Int. J. Miner.
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(PDF) Progress of Red Mud Utilization: An Overview
Red mud is a solid waste residue of the digestion of bauxite ores with caustic soda for alumina production. Its disposal remains a worldwide issue in terms of environmental concerns.
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Properties, hazards and valuable metal recovery technologies of red mud
The principal components of red mud are iron, aluminum, and other metal elements existing as oxides, exhibiting a high degree of similarity. Consequently, the recovery of iron, aluminum, and other metals from red mud by pyrometallurgical methods is a widely accepted recovery method, and related research is also the most numerous and in-depth.
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Characterization and source apportionment of heavy metal pollution …
In recent years, industrial waste and agrochemicals have reduced soil fertility and productivity, significantly impacting food security and ecosystems. In China, areas near red mud deposits from the aluminum industry show severe heavy metal contamination. This study examines agricultural soil near a …
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Groundwater Pollution Model and Diffusion Law in Ordovician …
Abstract. Read online. Red mud is a strong alkaline solid waste pollutant produced in the process of aluminum smelting, which causes great pollution to the regional groundwater environment due to its high content of fluorine and aluminum and high concentration of strong alkali.
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Transferring red mud to efficient adsorbent for the adsorption and
Red mud is a by-product of the aluminum manufacturing industry, with approximately 1–2 tons generated for every ton of Al 2 O 3 produced [1].The annual increase in red mud is 175.5 million tons [2].Additionally, as high-quality bauxite continues to be exploited, the use of lower-grade bauxites in aluminum production has led to a rise in the yearly production …
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Red Mud Disposal: The Ecological Concern of Alumina Refining
At every stage of aluminum production, starting from open cast Bauxite mining to caustic soda leach Bayer's Alumina refining process to the fluoride fused salt electrolytic …
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Groundwater Pollution Model and Diffusion Law in …
Abstract: Red mud is a strong alkaline solid waste pollutant produced in the process of aluminum smelting, which causes great pollution to the regional groundwater environment due to its high
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Environmental and Radiation Concerns of Red Mud
Red mud, also known as bauxite residue, is an insoluble byproduct generated from the extraction of alumina from bauxite during the Bayer process (Fig. 1), a crucial step in the manufacturing of aluminum. Highly alkaline and difficult to deal with, red mud presents a significant environmental hazard, especially when spilled out of the clay-lined ...
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Using imaging spectroscopy to map red mud dust waste: The …
The principal source of aluminum is bauxite which bauxite residue and the deposition and drying process (smelting and refining facilities), i.e. red mud, result in a range of different materials that have the potential to spread pollutant dust under windy conditions (Varnavas & Achilleopoulos, 1995).The refinery "muds" (both red and brown mud) dry to a …
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Bauxite residue (red mud) treatment: Current situation and …
Numerous researchers have conducted extensive studies on the comprehensive utilization of bauxite residue. Data analysis from Web of Science indicates a rapid increase in the number of publications related to bauxite residue in recent years, with citation frequencies also rising sharply since 2017 (Fig. 1 a), surpassing 20,000 in 2021.This trend suggests that the …
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Characterization and source apportionment of heavy metal …
This study systematically reveals the current status and sources of heavy metal pollution in a red mud dump and surrounding soil in a region of Shanxi Province. By …
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Red mud is piling up. Can scientists figure out what to do with it?
The company estimates that the red mud from a single aluminum refinery can lock up 70,000 tons of CO 2 per year, equivalent to taking more than 15,000 cars off the road. Yet …
WhatsApp: +86 18221755073
Characterization and source apportionment of heavy metal …
In China, areas near red mud deposits from the alu-minum industry show severe heavy metal contami-nation. This study examines agricultural soil near a red mud site in Shanxi Province, analyzing Cd, Cr, Hg, Ni, Pb, As, Cu, and Zn levels and distribu-tion. Geostatistical methods and GIS are utilized to assess heavy metal pollution using the ...
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Investigations on performance of alkali activated mortar mixes
A new kind of alkali–slag–red mud cementitious (ASRC) material, with both high early and ultimate strength and excellent resistance against chemical attacks, has been developed by the ...
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The large-scale sustainable utilization status of bauxite residue …
Red mud (abbreviated as RM) is a solid waste formed during the alumina refining process from bauxite. Every year, over 200 million tons of RM are discharged worldwide. …
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Experimental Investigation of Creep Behavior of Bayer Red Mud …
Long-term stability and safety of red mud disposal field is very important for the local residents' life, which necessitates the knowledge of its creep behavior. Through the improved triaxial creep apparatus, a series of triaxial drained creep tests were conducted. The results indicate that the creep behavior of BRM is significant with confining and deviatoric stresses …
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