Environmental remediation of thorium(IV) from aqueous medium onto Cellulosimicrobium cellulans isolated from radioactive wastewater

Elwakeel, Khalid Z.; El-Sadik, Hamdy A.; Abdel‐Razek, A. S.; Beheary, Mokhtar S.

doi:10.1080/19443994.2012.677405

Cited by 38 publications

(6 citation statements)

References 37 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Various methods have been used to improve the exchange capacity of natural and synthetic clinoptilolite, as well as many other related materials, for the removal of a number of heavy A C C E P T E D M A N U S C R I P T metals and radionuclides [18,[32][33][34][35]. One of the most cost effective pre-treatments, is 'activation' of the ion-exchange sites through the addition of chemicals such as salts or acids in order to get better ion uptake performance [12,18,27,[36][37][38].…”

Section: Introductionmentioning

confidence: 99%

The effect of pre-activation and milling on improving natural clinoptilolite for ion exchange of cesium and strontium

Yusuf

Harbottle

Hondow

et al. 2020

Journal of Environmental Chemical Engineering

View full text Add to dashboard Cite

show abstract

Section: Introductionmentioning

confidence: 99%

The effect of pre-activation and milling on improving natural clinoptilolite for ion exchange of cesium and strontium

Yusuf

Harbottle

Hondow

et al. 2020

Journal of Environmental Chemical Engineering

View full text Add to dashboard Cite

show abstract

“…It should be noticed that live and dead cells of Staphylococcus sp. strain MEH038S were kept in the refrigerator (4 ° C) until its use (Elwakeel et al, 2012; Mohapatra et al, 2019).…”

Section: Methodsmentioning

confidence: 99%

Decolorization mechanism, identification of an FMN‐dependent NADH‐azoreductase from a moderately halotolerant Staphylococcus sp. MEH038S, and toxicity assessment of biotransformed metabolites

Fazeliyan

Sadeghi

Forouzandeh

et al. 2021

Water Environment Research

View full text Add to dashboard Cite

The application of halotolerant microorganisms capable of decolorizing is attractive. Decolorization mechanism, the effect of different parameters on the decolorization percentage, and toxicity analysis of Reactive Black 5 before and after decolorization were investigated in the present study. The decolorization percentage for live cells of Staphylococcus sp. strain MEH038S was more than dead cells, which demonstrated that Reactive Black 5 was decolorized through the degradation process. The results confirmed that an FMN‐dependent NADH‐azoreductase gene was responsible for the decolorization and then was identified as Staphylococcus sp. EFS01 azoreductase from a moderately halotolerant Staphylococcus strain for the first time. The maximal decolorization of 98.15% was observed at pH 6.5 and 35 °C for 50 mg/L of Reactive Black 5. In addition, more than 90% decolorization was achieved with 5–40 g/L of NaCl. The results of Gas chromatography–mass spectrometry and Fourier transform infrared spectroscopy showed that Reactive Black 5 was broken to the lower molecular weight compounds without any chromophoric azo groups. Phytotoxicity and fish toxicity proved that the biotransformed metabolites of Reactive Black 5 degradation were more toxic than the original dye. The moderate halotolerant strain exhibited a remarkable decolorization capability and can be applied for textile wastewater treatment. Practitioner Points An azoreductase gene from a moderately halotolerant Staphylococcus was identified. More than 90% decolorization efficiency was observed under high‐salt conditions. Biotransformed metabolites of RB5 degradation were identified. Toxicity analysis of biotransformed metabolites was investigated.

show abstract

“…Solvent extraction methods [3][4][5][6] , ion exchange 7 , liquid membrane 8 , adsorption 9,10 and precipitation 11 methods are among the practical methods for separation elements from different aqueous solutions. One of the most important metal extraction processes is the solvent extraction method, which is widely used in various industries such as pharmaceuticals, hydrometallurgy, and waste management.…”

Section: Introductionmentioning

confidence: 99%

Optimization of thorium solvent extraction process from feed solution with Cyanex 272 by surface response methodology (RSM)

Khanramaki,

Keshtkar

2024

Preprint

View full text Add to dashboard Cite

Due to the limited reserves of uranium, the abundance of thorium compared to it and other advantages, the development of the thorium fuel cycle is of interest in different countries. The optimization of thorium extraction from a feed solution produced by Saghand ore with Cyanex 272 on a laboratory scale was evaluated by response surface method. The operating variables include Cyanex 272 concentration of 0.001 to 0.2 mol/L, pH of 0 to 2, equilibrium time of 5 to 60 min and aqueous to organic phase ratio of 0.5 to 2.5 were conducted. The results of the variance analysis of the fitted model revealed F = 35.35 and R2 = 0.9695. Based on the results, it can be said that the validated model shows an error of less than 4%. Therefore, the model is in good agreement with the experimental results. It can be said that there are significant interactions between operational parameters, which vindicate different feedbacks of the system in different operational conditions. The results showed that the 4 mol/L sulfuric acid was a suitable agent for recovering thorium ions from the loaded organic phase. In optimum conditions, the thorium purity percentage and thorium stripping efficiency were obtained 99.17 and 94.12%, respectively.

show abstract

Environmental remediation of thorium(IV) from aqueous medium onto Cellulosimicrobium cellulans isolated from radioactive wastewater

Cited by 38 publications

References 37 publications

The effect of pre-activation and milling on improving natural clinoptilolite for ion exchange of cesium and strontium

The effect of pre-activation and milling on improving natural clinoptilolite for ion exchange of cesium and strontium

Decolorization mechanism, identification of an FMN‐dependent NADH‐azoreductase from a moderately halotolerant Staphylococcus sp. MEH038S, and toxicity assessment of biotransformed metabolites

Optimization of thorium solvent extraction process from feed solution with Cyanex 272 by surface response methodology (RSM)

Contact Info

Product

Resources

About