Effects of key parameters in recycling of metals from petroleum refinery waste catalysts in bioleaching process

Asghari, I.; Mousavi, Seyyed Mohammad

doi:10.1007/s11157-013-9329-8

Cited by 31 publications

(22 citation statements)

References 56 publications

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“…where R is universal gas constant (8.314 J mol À1 K À1 ), E a activation energy of reaction and T absolute temperature. The linearized equation of eqn (16) is eqn (17) lnðrÞ…”

Section: Thermodynamic Modelingmentioning

confidence: 99%

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Ultrasound-assisted leaching of vanadium from fly ash using lemon juice organic acids

et al. 2020

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“…where R is universal gas constant (8.314 J mol À1 K À1 ), E a activation energy of reaction and T absolute temperature. The linearized equation of eqn (16) is eqn (17) lnðrÞ…”

Section: Thermodynamic Modelingmentioning

confidence: 99%

“…13,14 Using acids extracted from agricultural products are not only environmentally friendly but also good at resolving slow kinetics of bioleaching by microorganisms. [15][16][17] Moreover, using lemon juice as a renewable source of organic acids, the cost of leaching wastewater treatment is eliminated.…”

Section: Introductionmentioning

confidence: 99%

Ultrasound-assisted leaching of vanadium from fly ash using lemon juice organic acids

et al. 2020

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“…In the presence of spent catalyst from the petrochemical industry (HDS2R, ULSD/2010, and CAT_US) and catalytic converters (SAC-M1 and SAC-M2), the sulfate production in mg/L is 2627, 16,824, 21,430, 28,674, and 15,951 respectively, at the end of 21 days [12]. Thus, in the presence of solid wastes-containing metals, different factors and parameters can affect the sulfur-oxidizing activity of microorganisms, so the bioleaching process would be optimized by the manipulation of the follows parameters: (a) pulp density/solid-liquid ratio, (b) sulfur concentration, (c) microorganisms used, (d) culture media, (e) conditions of preliminary cultivations, (f) carbon dioxide, (g) population density, (h) osmotic pressure, (i) redox potential, (j) temperature, (k) water activity, (l) pH, (m) bioleaching period, (n) particle size, (o) shaking speed, (p) bioavailability of metal to the microorganism, (q) microbial requirements, (r) metal tolerance, (s) microorganisms adapted to waste, (t) waste's physiochemical properties, and (u) type of released metal, all of them could affect the sulfur-oxidizing activity [21][22][23][24]. Besides, it has been mentioned that during bioleaching, aeration with compressed air has a positive influence on sulfur-oxidizing activity, and an increase in the sulfate concentration improves the bioleaching process by the bacteria [24].…”

Section: Discussionmentioning

confidence: 99%

Acidithiobacillus thiooxidans DSM 26636: An Alternative for the Bioleaching of Metallic Burrs

2020

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Metallic wastes from the metal-mechanic industry represent a serious environmental problem. The possible strategies to reduce the metal content of these industrial wastes is their biotreatment by means of sulfur-oxidizing bacteria, such as Acidithioobacillus thiooxidans DSM 26636, which has been reported as an excellent metal-leaching microorganism by its capability to oxide sublimed sulfur and produce sulfuric acid in the presence of metallic burrs, and leach metals. The metallic composition of burrs was determined by ICP-OES before and after its exposure to biological treatment. The bioleaching process was kept for 21 days at 30 °C at an orbital shaking of 150 rev/min by using Erlenmeyer flasks of 125 mL containing 30 mL of Starkey-modified media added with 0.33 g (1% w/v) of sublimed sulfur and 0.33 g (1% w/v) of metal burrs, and 3 mL of inoculum at logarithmic phase. Results showed that A. thiooxidans was able to grow at these conditions with a maximum sulfate production of 11,028 mg/L, sulfuric acid corresponded to 0.16 M, but no statistical difference was observed for days 14 and 21. A reduction in pH was observed from 2.5 to 1.3 units. Metal bioleaching in mg/kg corresponded Fe (4658.5 ± 291), Cr (237 ± 46), Al (185 ± 12), Si (71 ± 10.3), Mo (63 ± 3.6), Mn (46 ± 3.3), V (18 ± 0.94), Mg (22.2 ± 3.7), Ni (15.8 ± 1.5), and Cu (5.7 ± 1.9). Results showed that A. thiooxidans DSM 26636 was able to grow in the presence of metal-containing wastes, and although metal removal was feasible, more studies are needed to enhance metal removal.

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“…4b). 8 h of experiment brought 51% extraction yield that increased to 65% after 24 h and 87% V extraction yield was achieved after 72 h. Application of larger particles (100-200 µm) resulted in higher final extraction yields, which was rather surprising as the reduction of particle size is believed to enlarge the available reaction surface and therefore increase the leaching yields [43,44]. In case of both 0.1-M and 1-M CA, the smaller PD (10%) gave better results in terms of V amount extracted.…”

Section: Bioleaching Efficiency and Kineticsmentioning

confidence: 98%

Vanadium removal from spent sulfuric acid plant catalyst using citric acid and Acidithiobacillus thiooxidans

Mikoda

Potysz

Kucha

et al. 2020

Archiv.Civ.Mech.Eng

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Spent catalysts being considered hazardous wastes exhibit a high metal content in mobile forms. In addition, growing demand for circular economy policy applications requires proper utilization of these wastes. This study aimed at the assessment of vanadium leaching from spent desulfurization catalyst derived from sulfuric acid plant dump located nearby a copper smelter. Chemical and phase composition of the catalyst has been characterized. The extraction has been performed using chemical (0.1-M and 1-M citric acid) and biological (biotic solution with Acidithiobacillus thiooxidans) methods, using different experimental parameters (pulp density, particle size, leaching time) to observe V leaching behavior and kinetics. The results revealed that both citric acid and bacteria carried out the extraction process well. The optimal parameters for acid leaching were < 0.2-mm particle size and 2% pulp density, which allowed to leach out 95% of V from spent catalyst within 48 h. The bacterially mediated extraction resulted in 93% V leached out within 21 days with 2% pulp density. The experiments showed that V present in the catalyst is susceptible to bioleaching and organic acid leaching with the latter being a quicker process.

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Effects of key parameters in recycling of metals from petroleum refinery waste catalysts in bioleaching process

Cited by 31 publications

References 56 publications

Ultrasound-assisted leaching of vanadium from fly ash using lemon juice organic acids

Ultrasound-assisted leaching of vanadium from fly ash using lemon juice organic acids

Acidithiobacillus thiooxidans DSM 26636: An Alternative for the Bioleaching of Metallic Burrs

Vanadium removal from spent sulfuric acid plant catalyst using citric acid and Acidithiobacillus thiooxidans

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