Modelling the Inhibitory Effect of SiO2-coated Zero-valent Iron/palladium Bimetallic Nanoparticles (Sio2-nZVI/Pd) Reductant on Pseudomonas putida as the Biocatalyst for 2,2’,4,4’-tetrabromodiphenyl ether Degradation

Authors

  • Bilal Ibrahim Dan-Iya Pharmacy Technician Department, College of Health Sciences and Technology, Kano Nigeria.
  • Ibrahim Alhaji Sabo Department of Microbiology, Faculty of Pure and Applied Sciences, Federal University Wukari, P.M.B. 1020 Wukari, Taraba State Nigeria.
  • Salihu Yahuza Department of Microbiology and Biotechnology, Federal University Dutse, PMB 7156, Dutse, Jigawa State, Nigeria.

DOI:

https://doi.org/10.54987/jemat.v8i1.518

Keywords:

SiO2-coated Bimetallic Nanoparticles, P. putida, Growth, Mathematical model, Buchanan-3-phase

Abstract

The used of linearization technique using natural logarithm transformation, though standard, is erroneous and can just give an estimated value for the sole parameter measured; the specific growth rate. in this paper, for the first time we model the effect of nZVI/Pd and SiO2-nZVI/Pd nanoparticles on the growth of P. putida in MSM medium as modelled using models such as von Bertalanffy, Baranyi-Roberts, modified Schnute, modified Richards, modified Gompertz, modified logistics and the most recent Huang. The results show that the lag phases of P. putida cell at 4 h (0.5 g L-1 of SiO2-nZVI/Pd), 7.655 h (1.0 g L-1 of SiO2-nZVI/Pd), 11.76 h (0.5 g L-1 of nZVI/Pd) and 22.03 h (1.0 g L-1 of nZVI/Pd) respectively, which were longer than that of control, indicating the nanoparticles prolonged the exponential phase of cell growth. Moreover, in comparing the maximum growth ymax, which was 1.23x109, there was a decrease in the P. putida growth, i.e 1.20x109 (0.5 g L-1 of SiO2-nZVI/Pd), 1.06x109 (1.0 g L-1 of SiO2-nZVI/Pd), 1.04x109 (0.5 g L-1 of nZVI/Pd) and 8.59x108 (1.0 g L-1 of nZVI/Pd) respectively, with more decrease in growth at the P. putida growth with nZVI/Pd than SiO2-nZVI/Pd. On the other hand, when comparing the µmax, the control has a value of 0.08 while 0.073, 0.073, 0.089 and 0.86 are values at bacterial concentration of (0.5 g L-1 of SiO2-nZVI/Pd), (1.0 g L-1 of SiO2-nZVI/Pd), (0.5 g L-1 of nZVI/Pd) and (1.0 g L-1 of nZVI/Pd) respectively, indicating the specific growth rate decreases with both 0.5 g L-1 of SiO2-nZVI/Pd and 1.0 g L-1 of SiO2-nZVI/Pd and increases with 0.5 g L-1 of nZVI/Pd and 1.0 g L-1 of nZVI/Pd. It is clear from the results that coating of SiO2 on nZVI/Pd might drastically decrease the toxicity to P. putida cells.

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Published

31.07.2020

How to Cite

Dan-Iya, B. I., Sabo, I. A., & Yahuza, S. (2020). Modelling the Inhibitory Effect of SiO2-coated Zero-valent Iron/palladium Bimetallic Nanoparticles (Sio2-nZVI/Pd) Reductant on Pseudomonas putida as the Biocatalyst for 2,2’,4,4’-tetrabromodiphenyl ether Degradation. Journal of Environmental Microbiology and Toxicology, 8(1), 21–26. https://doi.org/10.54987/jemat.v8i1.518

Issue

Vol. 8 No. 1 (2020)

Section

Articles

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