Optimization of sulfate leaching from Phosphogypsum for efficient bioreduction in a batch bioreactor using a sulfate-reducing microbial consortium

Danouche, M.; Bounaga, A.; Boulif, R.; Zeroual, Y.; Benhida, R.; Lyamlouli, K.

doi:10.1016/j.cej.2023.146072

Cited by 12 publications

(3 citation statements)

References 74 publications

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“…Alternatively, rCB can be chemically modified using either acids or alkaline agents. Sulfur recovery needs further research; a sustainable means to achieve this purpose is application of biological methods [34]. Thus, the economically viable reprocessing of rCB involves transforming it into less energy-intensive products.…”

Section: Carbon Blackmentioning

confidence: 99%

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Recycling of Low-Quality Carbon Black Produced by Tire Pyrolysis

Rikmann,

Mäeorg,

Liiv

2024

Applied Sciences

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Pyrolysis is a promising way to reuse of waste tires. However, the carbon black generated in the process is often contaminated with various pyrolysis products. This study aims to recycle low-quality recycled carbon black (rCB) from waste tire pyrolysis, addressing the challenges posed by organic residues (up to 5 wt% bituminous substances, 112.2 mg/kg PAH). This causes the agglomeration of particles and decreases the active specific surface area. Cavitational vortex milling (both wet and dry) emerges as a promising method to valorize contaminated rCB, allowing for a significant reduction in the concentration of contaminants. This novel method allows for the generation of hydrophilic and hydrophobic black pigments. In parallel experiments, low-quality rCB is incorporated into solid biofuel to enhance its calorific value. The addition of 10 wt% rCB) to peat residues significantly elevates the calorific value from 14.5 MJ/kg to 21.0 MJ/kg. However, this improvement is accompanied by notable increases in CO2 and SO2 emissions. This dual effect underscores the necessity of considering environmental consequences when utilizing recycled carbon black as a supplement to solid biofuels. The findings provide valuable insights into the potential of cavitational vortex milling for carbon black valorization and highlight the trade-offs associated with enhancing biofuel properties through the addition of rCB.

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Section: Carbon Blackmentioning

confidence: 99%

“…purpose is application of biological methods [34]. Thus, the economically viable reprocessing of rCB involves transforming it into less energy-intensive products.…”

Section: Hydrophobicmentioning

confidence: 99%

Recycling of Low-Quality Carbon Black Produced by Tire Pyrolysis

Rikmann,

Mäeorg,

Liiv

2024

Applied Sciences

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“…One of the possible applications of phosphogypsum is its use as a raw material for calcium sulfide synthesis [ 21 , 22 , 23 , 24 , 25 ]. Luminescent materials are produced based on CaS [ 26 ].…”

Section: Introductionmentioning

confidence: 99%

Studying the Process of Phosphogypsum Recycling into a Calcium Sulphide-Based Luminophor

Medennikov,

Egorova,

Shabelskaya

et al. 2024

Nanomaterials

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Currently, one of the most important problems of environmental protection is the deep and complex processing of mineral raw materials. This problem is especially relevant when processing substandard ores and production waste, one of which is phosphogypsum. This study examines the process of CaSO4/CaS composite material formation during the reduction of phosphogypsum with citric acid. The composite structure formation mechanism is proposed. The resulting materials are characterized using various methods, including X-ray diffraction (XRD), transmission electron microscopy, the Scherrer method, thermogravimetric analysis (TGA), and FT-IR spectroscopy. The reduced sample emits orange radiation in the range of 500–750 nm with a quantum yield of 0.17. Experimental results showed that the sample decomposition process in the solid state consisted of two components with a predominant contribution from the long-lived component (~46 ns). The optimal conditions for producing luminescent materials by reducing phosphogypsum with citric acid were determined: a heat treatment temperature of 1073 K, a holding time of 60 min, and a reducing agent mole fraction of 37%. It was found that an increase in temperature with a simultaneous decrease in heat treatment time, as well as a decrease in temperature with a simultaneous increase in heat treatment time, led to a decrease in the luminescent properties of the synthesized material compared to optimal values. The results can be used to develop technology for recycling large-tonnage waste from the chemical industry into luminescent materials.

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Exploration of the advantages of targeted isolation of deep-sea microorganisms and genetically engineered strains

Liu,

Feng,

et al. 2024

World J Microbiol Biotechnol

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Optimization of sulfate leaching from Phosphogypsum for efficient bioreduction in a batch bioreactor using a sulfate-reducing microbial consortium

Cited by 12 publications

References 74 publications

Recycling of Low-Quality Carbon Black Produced by Tire Pyrolysis

Recycling of Low-Quality Carbon Black Produced by Tire Pyrolysis

Studying the Process of Phosphogypsum Recycling into a Calcium Sulphide-Based Luminophor

Exploration of the advantages of targeted isolation of deep-sea microorganisms and genetically engineered strains

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