· The amount of nitrogen fixed decreased with tailings stress from 34.6 mg per plant in the soil treatment to 12.7 mg per plant in the tailing treatment. The tailings (pH ~ 9) elevated pH in the
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· Among the five treatments, the concentrations and total amounts of V in the leachates decreased in the order of Treatment 2 ≈ Treatment 1 > Treatment 4 > Treatment 5 > Treatment 3 (Fig. 3 A and B). Relative to Treatment 1, Treatment 2 exhibited the comparable concentrations and amounts of V in the leachates, while
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· An unplanted and un-amended tailings treatment was used as control. This was undertaken to address the lack of organic matter and available N as major constraints for plant growth in magnetite tailings in previous studies (Cross et al., 2019).
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However, the mobilization and redistribution of V within the tailing profile during the mineral transformation of tailings remain unclear. Herein, a series of concentrations of V(V) (0-200 mg L -1 ) solutions were added to the vanadium‑titanium magnetite tailings at different depths separately to simulate the redistribution of dissolved V released from tailings in
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In an another demonstration, a porous artificial ceramsite filter material was designed for sewage treatment is produced using Fe tailings and fly ash as primary raw materials
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In this study, a magnetic separation–shaking table gravity separation process was used to treat Sc-bearing V–Ti magnetite tailings, and the Sc2O3 content in the Sc concentrate was enhanced from 0.0039 to 0.0061%. The majority of the Sc in the Sc concentrate originates from augite, hornblende, and aluminosil-icate.
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· economic potential of the African iron-ore tailings: synthesis of magnetite for the removal These materials were synthesized through a simple thermal treatment at 550 C of a mixture
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· In this study, a magnetic separation–shaking table gravity separation process was used to treat Sc-bearing V–Ti magnetite tailings, and the Sc2O3 content in the Sc concentrate was enhanced from 0.0039 to 0.0061%. The majority of the Sc in the Sc concentrate originates from augite, hornblende, and aluminosilicate. Magnesium chloride
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· A semi-industry experiment of hydrogen-based mineral phase transformation for tailings is conducted with a roasting temperature of 500 °C, a reducing gas concentration of 20%, a total gas volume of 12 m 3 /h, and a handing capacity of 100
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· In summary, flotation plays a critical role in the treatment of complex tailings, where the selection of appropriate collectors, depressants, and frothers is crucial. Selecting and optimally dosing reagents constitute significant challenges in flotation processes, especially when dealing with tailings that have diverse mineral compositions.
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· magnetite tailings (VTMT) are a common industrial waste in China, which are harmful to the environment and (hydr)oxides in the tailings in 200 mg L-1 V(V) treatment. This portion of V mainly
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· When iron tailings were roasted at 650 C (Fig. 6 a), the goethite first lost water and was converted to hematite (Eq. 2), which then was converted to magnetite in a reducing atmosphere ((3), (4)), and finally cooled in a
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· Giri et al. [33] obtained magnetite nanoparticles from iron ore tailings, and assessed their adsorption efficiency of methylene blue and Congo red in aqueous solution. However, there isare no relevant studies have reported the preparation of nZVI nanoparticles derived from iron ore tailings so far, possibly because of the difficulty in
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· The V-Ti magnetite tailings used in this study were sampled from Majiatian tailing reservoir in Panzhihua, Sichuan Province, China (26 36′24″ N, 101 46′46″ E). This tailing reservoir was put into operation in May 1970 and officially closed in December 2020.
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· A large amount of V-Ti magnetite tailings have been generated in the selection process of Fe concentrate, Wang et al., 2021), which have the potential to be used for the future harmless treatment of tailings in this region. Genera Rhodobacter, Hydrogenophaga
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: 07 July 2023The alkali fusion treatment destructed the network structure of iron ore tailings, and the following acid leaching treatment selectively dissolved the metal ions to form
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· Abstract. Magnetite tailings (MTs) are waste generated from magnetite processing, which not only occupy lots of land, but also result in severe pollution to the surroundings. In this paper, the
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· Large stockpiles of magnetite tailings and municipal sludge create serious environmental problems. In this study, a n A novel application for magnetite tailings and municipal sludge in ceramsite preparation-Shi-2024-Environmental Progress & Sustainable Energy-Wiley Online Library
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· Background and aims Mine tailings are challenging substrates for ecological restoration, as the establishment of diverse native plant communities can be constrained by a range of edaphic factors. Thus, the ability to restore native vegetation communities will depend upon developing a clear evidence-base as to what types of
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· Given the fact that the V–Ti magnetite mine tailings harbour abundant rhizobacteria species and the plant can survive such harsh conditions, establishment of symbiosis may be possible. The present study aims to reveal for the first time the dynamic shifts of microbial consortia in the rhizosphere of Pongamia pinnata during a 2-year-long
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· population was favoured during in situ phytoremediation of vanadium-titanium magnetite mine tailings dam using for 30 days following 3 treatment schedules (0 h, 4 h, and 12 h per day
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· Therefore, it is necessary to provide a more feasible and scientific idea for the effective treatment of these tailings. Foam ceramics is a high porosity ceramic material made of advanced ceramic technology based on traditional ceramic raw materials [ 6 , 7 ].
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· A glasshouse trial was conducted using magnetite tailings containing various amendments, investigating the potential of the nitrogen (N)-fixing, non-native pioneer species Lupinus angustifolius
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The hematite and siderite in tailings were transformed into magnetite with an average magnetic conversion rate of 86.46%. This innovative PSRM technology provides an
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· foamed ceramics were prepared using 55 wt.% vanadium-titanium magnetite tailings (VTMT) followed The influence of raw materials ratio and heat treatment temperatures on crystalline phases
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· heavy metal distribution and microbial community characteristics of vanadium-titanium magnetite tailing the dissolved V concentrations in the bio-oxalic acid treatment reached maximum values
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· The concentration of Mn and Ni in VTM tailings was approximately 5 and 3 times higher, respectively, than in the magnetite tailings after growth of Imperata cylindrica (Yuan et al., 2018). The Cd concentration already exceeded the minimum inhibitory concentration for plant growth ( Zhang F. et al., 2019 ).
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Although the resource utilization of acid-leaching tailings has achieved certain results, more effective treatment processes are needed. In this research, efficient iron enrichment was innovatively proposed through “mineral phase transformation-magnetic separation” for the acid-leaching tailings of laterite nickel ore.
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· Generally, tailings are disposed as backfill waste and poured into the tailing pond without any treatment [5], [6]. The treatment of tailings is a problem to date. The occurrence of the ‘11.26’ Tailing Reservoir Leakage Accident in China caused extensive harm to the environment and economy [7].
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· recovers 71.80% of magnetite and only 0.09% of SiO fed in Sosseg o DAM copper tailing. It was recovered 65.58% of SiO in the screen classificati on, only 4.92% of SiO in the rougher magnetic
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