Environmentally sustainable and cost-effective bioleaching of aluminum from low-grade bauxite ore using marine-derived Aspergillus niger

Shah, Syed Sikandar; Palmieri, Maurício César; Sponchiado, Sandra Regina Pombeiro; Bevilaqua, Denise

doi:10.1016/j.hydromet.2020.105368

Cited by 23 publications

(8 citation statements)

References 59 publications

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“…The mechanism used by fungi is to convert sugars to organic acids, acidophilic bacteria either produces acid or convert Fe 2+ to Fe 3+ to serve as an oxidant. Moreover, amino acids are employed by the cyanogenic bacteria to produce cyanide [ 227 , 228 ]. The advantages of bioleaching generally include being economical and environmentally friendly, yet its shortcomings are low leaching efficiency (often less than 60%) and slower kinetics (on the order of weeks to months).…”

Section: Emerging Methods For Tetrabromobisphenol a Detection And Tre...mentioning

confidence: 99%

A Review on Tetrabromobisphenol A: Human Biomonitoring, Toxicity, Detection and Treatment in the Environment

et al. 2023

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Tetrabromobisphenol A (TBBPA) is a known endocrine disruptor employed in a range of consumer products and has been predominantly found in different environments through industrial processes and in human samples. In this review, we aimed to summarize published scientific evidence on human biomonitoring, toxic effects and mode of action of TBBPA in humans. Interestingly, an overview of various pretreatment methods, emerging detection methods, and treatment methods was elucidated. Studies on exposure routes in humans, a combination of detection methods, adsorbent-based treatments and degradation of TBBPA are in the preliminary phase and have several limitations. Therefore, in-depth studies on these subjects should be considered to enhance the accurate body load of non-invasive matrix, external exposure levels, optimal design of combined detection techniques, and degrading technology of TBBPA. Overall, this review will improve the scientific comprehension of TBBPA in humans as well as the environment, and the breakthrough for treating waste products containing TBBPA.

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Section: Emerging Methods For Tetrabromobisphenol a Detection And Tre...mentioning

confidence: 99%

A Review on Tetrabromobisphenol A: Human Biomonitoring, Toxicity, Detection and Treatment in the Environment

et al. 2023

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“…An additional barrier is the high cost of suitable carbon feedstock [40]. However, such costs could be mitigated by using low-cost organic wastes from the food or agricultural industries [41].…”

Section: Non-contact Two-step Heterotrophic Bioleachingmentioning

confidence: 99%

Sustainable Metal Recovery from Secondary Resources: Screening and Kinetic Studies Using Analogue Heterotrophic Metabolites

Varia

Snellings²,

Hennebel

2020

Waste Biomass Valor

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This study presents a sustainable approach for metal extraction from a range of secondary resources. Organic acids analogue to those commonly produced by heterotrophic microbes are applied via a two-step heterotrophic bioleaching approach. New insights into leaching mechanisms are developed and the potential use of the leaching residues as cementitious component is evaluated. Tested materials include a jarosite sludge from Zn refining, four ferrous metallurgy residue sludges and two dry automotive recycling shredder residues. Screening experiments tested three organic acids (i.e. citric, gluconic, oxalic acid) and their combinations. Four physicochemical factors were varied, i.e. the solid/liquid ratio between 5 and 15%, total organic acid concentration between 20 and 200 mM, leaching times of 2 to 4 hrs and horizontal stirring reactor mixing rate. The highest extraction capacity was achieved for a Cr/Ni rich sludges from steel treatment with up to 96 % Ni and 91 % Cr extraction at a 5% S/L and a mixture of 100 mM citric and 100 mM oxalic acid. Further scale-up kinetic studies on this Cr/Ni sludge validated the optimal leaching conditions. Modelling of kinetic leaching data indicated pore diffusion rate as a bottleneck of the overall leaching process. Screening tests of the leached residue indicated potential use as sulfate-rich addition to cement, or as part of low-performance binders for large scale civil works.

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“…Among the diversity of natural and man-made settings where this is so, few are more complicated than those in nuclear waste processing chemistry. For example, boehmite (AlOOH) and gibbsite (Al(OH) 3 ) are some of the most naturally abundant and industrially important aluminum (oxy)hydroxide minerals on Earth. − Because aluminum was widely used as a cladding material for nuclear fuel rods during the early era of weapons production, gibbsite and boehmite comprise over 70% of approximately 60,000 t of nuclear waste sludge at the U.S. Department of Energy Hanford site. − Over decades of storage, these minerals have been continually exposed to a background flux of β and γ radiation from the decay of major radionuclides such as 137 Cs and 90 Sr, resulting in the modification of their thermodynamic stability and/or surface charge due to structural damage. , A large effort is now underway to process these wastes for safe long-term storage, but key knowledge gaps remain about how the chemical and physical properties of the solids may differ from those of pristine phases and how these differences might influence waste chemistry and rheology. ,− …”

Section: Introductionmentioning

confidence: 99%

Effects of Ionizing Radiation on the Thermodynamic Stability of Boehmite and Gibbsite

Chen,

Zhu,

Bergman

et al. 2024

J. Phys. Chem. C

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We examined the effect of γ radiation on the stabilities of aluminum hydroxide (gibbsite) and aluminum oxyhydroxide (boehmite) nanoparticles in relation to their thermal decomposition. X-ray diffraction (XRD) patterns and scanning electron microscopy (SEM) images revealed no significant differences in mineral components or morphologies before and after radiation. However, thermogravimetric and differential scanning calorimetry (TGA/DSC) analyses showed that both boehmite and gibbsite nanoparticles experienced a decreased mass loss following irradiation. Raman and attenuated total reflection-Fourier transfer infrared (ATR-FTIR) spectra indicated that a fraction of the hydroxyl content in both cases was selectively cleaved by radiation, primarily at the particle surfaces. Quantitative analyses of thermal mass loss behavior demonstrated that irradiated boehmite and gibbsite nanoparticles had higher activation energies than their pristine counterparts, with the extent of the increase being dependent on the total dose. Taken together, these findings suggest that exposure to a sufficient dose of ionizing radiation alters these materials such that they are less prone to decomposition by dehydration. This increased stability may be due to the decreased hydrous nature of the samples after radiation exposure, which was supported by further high-temperature drop calorimetry. Additionally, a radiation-induced amorphous phase on the nanoparticle surfaces appears to have a permanent and positive influence on the thermodynamic stabilities.

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Environmentally sustainable and cost-effective bioleaching of aluminum from low-grade bauxite ore using marine-derived Aspergillus niger

Cited by 23 publications

References 59 publications

A Review on Tetrabromobisphenol A: Human Biomonitoring, Toxicity, Detection and Treatment in the Environment

A Review on Tetrabromobisphenol A: Human Biomonitoring, Toxicity, Detection and Treatment in the Environment

Sustainable Metal Recovery from Secondary Resources: Screening and Kinetic Studies Using Analogue Heterotrophic Metabolites

Effects of Ionizing Radiation on the Thermodynamic Stability of Boehmite and Gibbsite

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