Molybdenum Blue Production from Serratia sp. strain DRY5: Secondary Modeling

Sabó, I; Yahuza, Salihu; Shukor, Mohd Yunus

doi:10.54987/bstr.v9i2.622

Cited by 3 publications

(3 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This software is widely acknowledged and embraced within the scientific community [7], for its capacity to convert scanned figures into digital data. Its precision and reliability have been consistently recognized by numerous researchers [8,9]. The data was further analyzed and modeled using Curve Expert Professional software (Version 2.6.5) to elucidate the scientific insights and trends within the dataset, contributing to the robustness of the study's findings.…”

Section: Data Acquisitionmentioning

confidence: 99%

Substrate Inhibition Modelling of Pseudomonas nitroreducens Growth on Octylphenol Polyethoxylates

Abubakar,

Yakasai,

Uba

et al. 2023

J Environ Microbiol Toxicol

View full text Add to dashboard Cite

Octylphenol polyethoxylates (OPEs) constitute a class of non-ionic surfactants extensively employed in various industrial applications. However, concerns have arisen regarding the potential environmental and human health impacts of OPEs because of their widespread use and persistence in aquatic environments. Bioremediation of OPE in the environment using OPE-degrading bacterium is appealing as bacterial metabolism converts OPE to harmless carbon dioxide and water as byproducts. In this study, various secondary growth models such as Luong, Yano, Teissier-Edward, Aiba, Haldane, Monod, Han, and Levenspiel were employed to model the inhibitory effect of high OPE concentrations to the growth rate of Pseudomonas nitroreducens TX1 the bacterium on OPE. Following thorough statistical analyses such as root-mean-square error (RMSE), adjusted coefficient of determination (adjR2), bias factor (BF), and accuracy factor (AF), the Teissier model emerged as the most optimal choice. All of the studied models showed good fittings except Moser, Monod and Hinshelwood which showed the poorest curve fitting. The Teissier model emerged as the most suitable model, as indicated by its remarkably low values for RMSE, AICc, and modified adjR2. Furthermore, the model's AF and BF values were close to unity (Table 2). The experimental data obtained indicates that OPE is toxic and slows down the rate of growth at higher concentrations. The maximum OPE specific growth rate (max), half-saturation concentration (KS), half inhibition concentration (Ki) was 0.613 h-1 (95% Confidence Interval or C.I. from 0.519 to 0.707), 2352.8 mg/L (95% C.I. from 1668.8 to 3036.8) and 52,456.7 mg/L (95% C.I. from 38395.0 to 66518.5), respectively. It is possible that these new constants found when modeling could be useful inputs for future modeling efforts.

show abstract

Section: Data Acquisitionmentioning

confidence: 99%

Substrate Inhibition Modelling of Pseudomonas nitroreducens Growth on Octylphenol Polyethoxylates

Abubakar,

Yakasai,

Uba

et al. 2023

J Environ Microbiol Toxicol

View full text Add to dashboard Cite

show abstract

“…One of them is the enzymatic transformation of metals into precipitable forms in which they pose less risk. Reducing the toxicity of soluble molybdenum can result in the formation of molybdenum blue (Mo-blue), a precipitable substance with a beautiful blue color [23][24][25][26][27][28][29][30][31][32][33].…”

Section: Historymentioning

confidence: 99%

Immobilization of Bacillus sp. Strain Neni-8 in Dialysis Tubing Reduced Copper Toxicity to the Molybdenum Reduction Process

Uba

Abubakar

Yakasai

2022

Bioremed Sci Technol Res

View full text Add to dashboard Cite

In ruminants, even trace amounts of molybdenum can be lethal. In areas with high pollution, molybdenum levels in soil and mine tailings can exceed 20,000 ppm. Bioremediation of molybdenum can be challenging when toxic copper is also present. This research presents a novel approach using dialysis tubing and the molybdenum-reducing activity of Bacillus sp. strain Neni-8 for molybdenum removal from aqueous solutions. Molybdenum blue (Mo-blue), produced during enzymatic reduction, is insoluble in dialysis tubing and this can be a twofold advantage as a method of removal and as a method to protect bacterial cells from heavy metal inhibition, especially copper. In this experiment, we assess the toxicity-shielding effect of dialysis tubing for molybdenum reduction to Mo-blue by this bacterium in the presence of copper. As the concentrations of copper were increased, both free and immobilized cells were strongly inhibited. Modelling using the dissociationone-phase exponential decay model gave an IC50 value for the immobilized form of 0.1107 mg/L (95% confidence interval from 0.073 to 0.217 while the IC50 value for the free cell system was 0.023 mg/L (95% C.I. from 0.019 to 0.028). Since the confidence interval for the IC50 values did not overlap, the immobilized system gave better protection from copper than the free cell system. Toxicity to free cells was higher than toxicity to cells trapped in dialysis tubes, suggesting that trapping Mo-reducing cells may be an effective strategy for the bioremediation of water or wastewater contaminated with multiple heavy metals.

show abstract

“…Enzymatic reduction of metal into a less hazardous precipitable state is one of them. One particularly eye-catching instance is the reduction of molybdenum to molybdenum blue (Mo-blue), a precipitable material with a stunning blue color [3,[20][21][22][23][24][25][26][27][28][29]. It has been known for at least the last century that some microorganisms can convert molybdate into Mo-blue.…”

Section: Introductionmentioning

confidence: 99%

Entrapment of Mo-reducing Bacterium Increase its Resistance towards Mercury

Uba

Shukor

Yakasai

2022

J Environ Bioremed Toxicol

View full text Add to dashboard Cite

In ruminants, even trace amounts of molybdenum can be lethal. In areas with high pollution, molybdenum levels in soil and mine tailings can exceed 20,000 ppm. Bioremediation of molybdenum can be challenging when toxic mercury is also present. This research presents a novel approach using dialysis tubing and the molybdenum-reducing activity of Enterobacter sp. strain Dr. Y13 for molybdenum removal from aqueous solutions. Molybdenum blue (Mo-blue), produced during enzymatic reduction, is insoluble in dialysis tubing and this can be a twofold advantage as a method of removal and as a method to protect bacterial cells from heavy metal inhibition, especially mercury. In this experiment, we assess the toxicity-shielding effect of dialysis tubing for molybdenum reduction to Mo-blue by this bacterium in the presence of mercury. As the concentrations of mercury were increased, both free and immobilized cells were strongly inhibited. Modelling using the dissociationone phase exponential decay model gave an IC50 value for the immobilized form of 0.1107 mg/L (95% confidence interval from 0.073 to 0.217 while the IC50 value for the free cell system was 0.023 mg/L (95% C.I. from 0.019 to 0.028). Since the confidence interval for the IC50 values did not overlap, the immobilized system gave better protection from mercury than the free cell system. Toxicity to free cells was higher than toxicity to cells trapped in dialysis tubes, suggesting that trapping Mo-reducing cells may be an effective strategy for bioremediation of water or wastewater contaminated with multiple heavy metals.

show abstract

Molybdenum Blue Production from Serratia sp. strain DRY5: Secondary Modeling

Cited by 3 publications

References 6 publications

Substrate Inhibition Modelling of Pseudomonas nitroreducens Growth on Octylphenol Polyethoxylates

Substrate Inhibition Modelling of Pseudomonas nitroreducens Growth on Octylphenol Polyethoxylates

Immobilization of Bacillus sp. Strain Neni-8 in Dialysis Tubing Reduced Copper Toxicity to the Molybdenum Reduction Process

Entrapment of Mo-reducing Bacterium Increase its Resistance towards Mercury

Contact Info

Product

Resources

About