New polymeric/inorganic hybrid sorbents based on red mud and nanosized magnetite for large scale applications in As(V) removal

To realize a large-scale consumption of red mud in the steelmaking industry, a new recycling method was investigated through the pre-reduction roasting experiment and the slag-metal interaction experiment simulating the hot metal pretreatment process in the steelmaking industry. In virtue of the sensible heating of the hot metal and the reducibility of [C] and [Si], the iron could be separated and recovered from the pre-reduced red mud pellets into the hot metal directly with a recovery rate exceeding 75%. With the composition adjustment of the residual oxides in the pre-reduced red mud (PRRD) using CaO and Al2O3 or aluminium dross (AD), a slag having a low melting point (below 1300 °C) and a high sulfide capacity (lgCS = −2.3) was formed, and more than 94% of [S] in the hot metal could be removed into this slag through the slag-metal interaction. The desulfurization efficiency of the flux (PRRD-CaO–Al2O3; PRRD-CaO–AD) is approximate to the traditional desulfurizing flux (CaO–CaF2). The advantages of this method are summarized as the low energy cost and the slag valorization.

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Large-Scale Consumption and Zero-Waste Recycling Method of Red Mud in Steel Making Process

Minerals ◽

10.3390/min8030102 ◽

2018 ◽

Vol 8 (3) ◽

pp. 102 ◽

Cited By ~ 5

Author(s):

Guoshan Ning ◽

Bo Zhang ◽

Chengjun Liu ◽

Shuai Li ◽

Yun Ye ◽

...

Keyword(s):

Red Mud ◽

Large Scale ◽

Waste Recycling ◽

Zero Waste ◽

Steel Making

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A novel layered organic polymer-inorganic hybrid zinc poly (styrene-phenylvinylphosphonate)-phosphate immobilized chiral salen Mn(III) catalyst large-scale asymmetric epoxidation of unfunctionalized olefins

Journal of Organometallic Chemistry ◽

10.1016/j.jorganchem.2011.04.027 ◽

2011 ◽

Vol 696 (15-16) ◽

pp. 2797-2804 ◽

Cited By ~ 16

Author(s):

Xiaoyan Hu ◽

Xiangkai Fu ◽

Jiangwei Xu ◽

Changwei Wang

Keyword(s):

Large Scale ◽

Asymmetric Epoxidation ◽

Organic Polymer ◽

Inorganic Hybrid

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Taxonomic- and trait-based recolonization dynamics of a riverine fish assemblage following a large-scale human-mediated disturbance: the red mud disaster in Hungary

Hydrobiologia ◽

10.1007/s10750-015-2262-9 ◽

2015 ◽

Vol 758 (1) ◽

pp. 31-45 ◽

Cited By ~ 4

Author(s):

Tibor Erős ◽

Péter Takács ◽

István Czeglédi ◽

Péter Sály ◽

András Specziár

Keyword(s):

Fish Assemblage ◽

Red Mud ◽

Large Scale ◽

Riverine Fish

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Review of the Valorization of Normalized Red Mud as Environmentally Sustainable Waste Management

Current Journal of Applied Science and Technology ◽

10.9734/cjast/2021/v40i2431505 ◽

2021 ◽

pp. 57-69

Author(s):

Siba Prasad Mishra ◽

Madhurima Das ◽

Saswat Mishra

Keyword(s):

Red Mud ◽

Large Scale ◽

Ceramic Materials ◽

Waste Valorization ◽

Environmentally Sustainable ◽

Indian Context ◽

Large Numbers ◽

High Alkalinity ◽

Bauxite Ore ◽

Extraction Processes

The Red Mud has focused through major industrial and scientific research in industrial waste valorization. Red mud is the discarded produce of alumina extraction processes from its parent the bauxite ore. Its high alkalinity causes it to be kept in large quantities, resulting in increased deforestation. Annually, it is estimated that 64.2 MMT of red mud wastes are formed around the world, and India produces about 9MMT with less hope of being reused, posing a serious threat of pollution and contamination of both soil, ground water and the environment. Large numbers of research have shown that this bauxite solid waste can be refurbished to make construction bricks, pavement tiles, ceramic materials, but no full large-scale benign re-utilization have been made. The intent of the research is to probe in to the applications of red mud in the construction and various sectors, giving emphasis on Indian context. Other researchers' observations were considered and analyzed in terms of environmental, economic, and technical feasibility to fulfill zero waste demand due to red mud.

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Utilization of Red Mud as a Source for Metal Ions—A Review

Materials ◽

10.3390/ma14092211 ◽

2021 ◽

Vol 14 (9) ◽

pp. 2211

Author(s):

Sneha Samal

Keyword(s):

Metal Ions ◽

Red Mud ◽

Large Scale ◽

Cost Benefit Analysis ◽

Cost Benefit ◽

Major Elements ◽

Metal Recovery ◽

Minor Elements ◽

Sustainable Environment ◽

Alumina Industry

An overview is presented on the prospective use of red mud as a resource in this review. Various scopes are suggested for the utilization of red mud to maintain a sustainable environment. The potential use of red mud covers the valuable metal recovery that could emphasize the use of red mud as a resource. Red mud could act as reduced slag in the metallurgical field for the extraction of minerals and metals for upscale application. Although many studies have revealed the potential utilization of red mud, most of them are only limited to a lab-scale basis. Therefore, a large-scale investigation on recycling of red mud for the extraction in the area of the metal recovery section will draw attention to the extensive use of red mud. Metal ions of major elements Fe (44 wt.%), Al (18.2 wt.%), Si (14.3 wt.%), Ti (9.3 wt.%), Na (6.2 wt.%), Ca (4.4 wt.%) as major elements and of Mg, V, Mn, Cr, K as minor elements and rare earth elements such as Ce (102 mg/kg), La (56 mg/kg), Sc (47 mg/kg), Nd (45 mg/kg), Sm (9 mg/kg). Moreover, an appropriate in-house metal recovery facility with the alumina industry will come out as a cost–benefit analysis.

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Taxonomic and trait based recolonization dynamics of a riverine fish assemblage following a large scale human mediated disturbance: the red mud disaster in Hungary

Frontiers in Marine Science ◽

10.3389/conf.fmars.2015.03.00251 ◽

2015 ◽

Vol 2 ◽

Author(s):

Eros Tibor ◽

Takacs Peter ◽

Czegledi Istvan ◽

Saly Peter ◽

Specziar Andras

Keyword(s):

Fish Assemblage ◽

Red Mud ◽

Large Scale ◽

Riverine Fish

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Current key options for management of industrial alkaline waste of alumina production (red mud)

E3S Web of Conferences ◽

10.1051/e3sconf/202128401003 ◽

2021 ◽

Vol 284 ◽

pp. 01003

Author(s):

Htet Ye Aung ◽

Alexander Boyarintsev ◽

Sergey Stepanov ◽

Andrei Shoustikov

Keyword(s):

Red Mud ◽

Large Scale ◽

Cost Effective ◽

Industrial Wastes ◽

Toxic Waste ◽

Alumina Production ◽

The Sustainable Development ◽

The World ◽

Liquid Products ◽

Bauxite Ore

Due to the ever-increasing demand of the world economy for aluminum, its alloys and compounds, the production of this metal is increasing annually throughout the world. This leads to an increase in the industrial production of alumina, which is obtained from bauxite ore in the Bayer process. After recovering the bulk of the aluminum from the bauxite ore, there remains a residue which is highly alkaline toxic waste, which is also called bauxite residues (tailings) or red mud (RM). About 140-150 million tons of RM are produced annually and almost 4 billion tons have already been accumulated. At the moment, the problem of RM recycling and the development of effective and cost-effective approaches to their reprocessing is extremely urgent. Reducing RM affects economic, environmental, social areas and is a prerequisite for the sustainable development of nature and society. Despite active scientific research and efforts to develop and optimize various methods for RM recycling and reprocessing, the problem of an annual increase in their volumes around the world remains unresolved. Recently, promising and efficient processes have been proposed that allows for the complex reprocessing of RM with the extraction of a number of valuable liquid products that may be in demand in various fields of industry. This allows to focus on large-scale disposal of RM and can be a solution to the problem of handling these industrial wastes. The article considers the main current trends in the field of management of various types of RM with a focus on complex reprocessing and zero waste concepts.

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