Journal ArticleDOI
Conversion of alkaline characteristics of bauxite residue by mechanical activated pretreatment: Implications for its dealkalization.
TLDR
In this paper , the effect of mechanical grinding pretreatment on the transformation mechanism of bauxite solids to free alkali at the BR interface under acids leaching was investigated by monitoring the morphology, phase, and speciation transformations of Al and Si using primarily cross-section scanning electron microscopy-energy dispersive X-ray spectroscopy (SEM-EDS) elemental mapping, XRD, X-Ray photoelectron spectroscope (XPS).About:
This article is published in Journal of Environmental Management.The article was published on 2022-01-05. It has received 5 citations till now. The article focuses on the topics: Medicine & Alkalinity.read more
Citations
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Journal ArticleDOI
Ca-driven stable regulatory of alkalinity within desilication products: Experimental, modeling, transformation mechanism and DFT study.
Yujun Wu,Dandan Deng,Jun Jiang,Feng Li,Jiaqing Zeng,Xuyao Guo,Fengrong Zhu,Yifan Jiang,Shengguo Xue +8 more
TL;DR: In this paper , the authors investigated the action mechanism of calcium ion on sodalite and cancrinite by various microspectroscopic methods, and then employed spin-polarized density functional theory (DFT) calculations to reveal the reaction pathways of calcification and migration in minerals.
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Research on the mechanism of sodium separation in bauxite residue synergy preparation of potassium-containing compound fertilizer raw materials by the hydrothermal method.
TL;DR: In this paper , a dissolution-precipitation controlled sodium-potassium ion replacement reaction was proposed to remove sodium in bauxite residue synergistic preparation of potassium-containing compound fertilizer raw materials.
Journal ArticleDOI
Staged characteristics of red mud dealkalization by CO2 and SO2
TL;DR: In this paper , the dealkalization of red mud by acid neutralization has been widely investigated and the involved issues concerning reaction mechanisms are not fully understood, which questions the feasibility of the practice.
Journal ArticleDOI
Root architectures differentiate the composition of organic carbon in bauxite residue during natural vegetation.
TL;DR: In this paper , three plants with different root architectures including Artemisia lavandulaefolia, moss, and Zanthoxylum simulans (Z. simulans) were selected to investigate the rhizosphere effects on the composition and structure of organic carbon in bauxite residue.
References
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Journal ArticleDOI
Auger and photoelectron line energy relationships in aluminum–oxygen and silicon–oxygen compounds
TL;DR: In this article, the location of points on the plots can be understood on the basis of polarizability of the environment (on the Auger parameter grid of lines, slope +1) and on the factors contributing to the energy of the final state ion in the auger transition (a grid of line, slope −1).
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Bauxite residue issues: III. Alkalinity and associated chemistry
TL;DR: A detailed understanding of the complex buffering and neutralization chemistry of bauxite residue remains the key to improved management, both in terms of reduced environmental impact for current storage practices, legacy costs and for the utilization of the material as an industrial byproduct for other applications as mentioned in this paper.
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Characterization of red mud derived from a combined Bayer Process and bauxite calcination method
TL;DR: Red mud derived from a combined Bayer Process and bauxite calcination method was characterized and showed that pH of the red mud decreased with increasing duration of storage time, and the degree of crystallization and thermal stability of thered mud increased with increasingduration of storage.
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Evaluation of bauxite residues (red muds) of different origins for environmental applications
K. Snars,Robert Gilkes +1 more
TL;DR: In this article, the acid buffering behaviour of red muds was investigated by incubation of acid-treated red mud with various amounts of hydrochloric acid and showed that sodalite and calcite buffer (i.e. dissolve) simultaneously.
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Dispersal and attenuation of trace contaminants downstream of the Ajka bauxite residue (red mud) depository failure, Hungary.
William M. Mayes,Adam P. Jarvis,Ian T. Burke,Melanie Walton,Viktória Feigl,Orsolya Klebercz,Katalin Gruiz +6 more
TL;DR: The spatial extent of bauxite processing residue (red mud)-derived contaminants and modes of transport within the Marcal and Rába river systems after the dike failure at Ajka, western Hungary is identified.