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Bauxite residue is a hazardous solid waste produced during the production of alumina. Its high alkalinity is a potential threat to
Bauxite residue is a highly alkaline material generated from the production of alumina in which bauxite is dissolved in caustic soda. Approximately 4.4 billion tons of
Alkaline anions, include CO32–, HCO3–, Al(OH)4–, OH–, continuously released from bauxite residue (BR), will cause a potential disastrous impact on
Bauxite residue is an alkaline waste material in the process of alumina production due to its characteristics of higher salinity and alkalinity, which results in
Therefore, in this study, a comprehensive investigation of the decrease in the alkalinity of bauxite residue and the transformation of its constituent minerals owing
The chemistry of bauxite residues is dominated by the presence of multiple alkaline solids, which impart significant acid neutralizing capacity. The pH in untreated
Bauxite residue is a kind of strong alkaline waste produced in the production of alumina. Its longterm storage poses a potential threat to the environment. With the
The CO 2 sequestration potential of bauxite residue, with its high alkalinity, can be calculated as much greater, provided the Ca concentration is sufficient. In this
Abstract. Bauxite residue is the waste generated during alumina production by Bayer's process. The amount of bauxite residue (4050 wt%) generated depends on the quality of
Basic alkalinity of the residue from the five locations are presented in Table 1.Following disposal, alkalinity decreased. For fresh residue, initial alkalinity was 28350 mg L −1 Na 2 CO 3, compared to 21860 mg L −1 Na 2 CO 3 from the 20 year old disposal area. Alkalinity is a result of the caustic solution from the Bayer process, and because of
1. Introduction. The alumina industry has been expanding rapidly due to the increasing demand for aluminum. Nevertheless, these rapid developments have caused multiple environmental issues which currently limit the sustainable development of the alumina industry,.Bauxite residue (BR, or red mud) is an alkaline solid waste generated
Purpose Biomass fermentation has been proposed as a simple and economical strategy to alleviate the high alkalinity of bauxite residue. This study investigates the neutralization of bauxite residue following the application of biomass as an alkali modifier by natural fermentation. Materials and methods Fresh bauxite residue samples were
The prevalent pH rebound phenomenon in the bauxite residue alkalinity regulation is primarily caused by the presence of alkaline minerals, including sodalite and cancrinite. Calcium ion is widely used to remove the free alkali for reducing the alkalinity of bauxite residue, but its underlying mechanism on alkaline minerals is still unclear.
Bauxite residue is a kind of strong alkaline waste produced in the production of alumina. Its longterm storage poses a potential threat to the environment. With the tightening of environment policies in various countries, the strong alkalinity of bauxite residue has become a bottleneck restricting
Aiming at alkaline problem of bauxite residue, this work focused variation of alkaline characteristics in bauxite residue through phosphogypsum treatment. The results demonstrated that the pH of bauxite residue reduced from initial 10.83 to 8.70 when 1.50 wt% phosphogypsum was added for 91 d. The removal rates of free alkali and
bauxite residue is unsuitable for regulating the alkalinity of the combined bauxite residue. It is important to find a more effective neutralizing agent to reduce the alkalinity of the combined bauxite residue. Ferroussulfate(FS)asareadilyavailablematerialand,asa ite residues slurries (40% w/w)
赤泥是氧化铝工业生产过程产生的强碱性固体废弃物，资源化利用难、环境风险高，严重制约了氧化铝行业的可持续发展.赤泥土壤化是实现规模化处置赤泥的一种可行方法，而碱性调控则是赤泥土壤化的关
Alkalinity is a measure of the capacity of water to neutralize acids. This is known as the buffering capacity of water or the ability of water to resist a change in pH when acid is added. Alkalinity in water (with a pH of 7.0 or higher) is caused primarily by the presence of dissolved acidneutralizing substances (alkali).
bau ite refining water use; Bauxite Official Satisfactory Wiki How to Setup and Use a Refinery in Satisfactory DiamondLobby Gypsum (CaSO 4 .2H 2 O) amendment of bauxite residue can lower alkalinity and improve the residue Ca status Peter M. Source: The Science of the total environment v.763 pp. 143046 ISSN: 00489697 Subject
Purpose Biomass fermentation has been proposed as a simple and economical strategy to alleviate the high alkalinity of bauxite residue. This study investigates the neutralization of bauxite residue following the application of biomass as an alkali modifier by natural fermentation. Materials and methods Fresh bauxite residue samples were
The high alkalinity of bauxite residue and its sustained release impose major limitation on its reuse and ecological disposal. It has been confirmed from sustained rehabilitation that gypsum can effectively reduce the alkalinity of bauxite residue by continuously releasing Ca2+ to react with carbonate and hydroxide. However, the
Neutralization of alkaline properties of bauxite residue (BR) by using organic acid and gypsum additions may effectively improve electrochemical properties and alleviate physicochemical barriers to ecological rehabilitation. Mineral acids, citric acid and hybrid acid–gypsum additions were compared for their potential to transform and improve zeta
Bauxite residue is a kind of strong alkaline waste produced in the production of alumina. Its longterm storage poses a potential threat to the environment. With the tightening of environment policies in various countries, the strong alkalinity of bauxite residue has become a bottleneck restricting
Bauxite residue is a hazardous solid waste produced during the production of alumina. Its high alkalinity is a potential threat to the environment which may disrupt the surrounding ecological balance of its disposal areas. China is one of the major global producers of alumina and bauxite residue, bu
Bauxite residue is a byproduct of the Bayer Process. It is primarily composed of the insoluble fraction of the bauxite ore that remains after extraction of the aluminiumcontaining components. Iron oxides (10
Alkalinity is a measure of the capacity of water to neutralize acids. This is known as the buffering capacity of water or the ability of water to resist a change in pH when acid is added. Alkalinity in water (with a pH of 7.0 or higher) is caused primarily by the presence of dissolved acidneutralizing substances (alkali).
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Moreover, acidity in residue E47 had a similar effect on neurovirulence. Furthermore, the alkaline E138 residue enhanced susceptibility to heparin inhibition in vitro and limited JEV diffusion in mouse brain. These results suggest that the acidity/alkalinity of the E138 residue plays an important role in neurovirulence determination.
bau ite refining water use; Bauxite Official Satisfactory Wiki How to Setup and Use a Refinery in Satisfactory DiamondLobby Gypsum (CaSO 4 .2H 2 O) amendment of bauxite residue can lower alkalinity and improve the residue Ca status Peter M. Source: The Science of the total environment v.763 pp. 143046 ISSN: 00489697 Subject
