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Article

Effect of Nickel as Stress Factor on Phenol Biodegradation by Stenotrophomonas maltophilia KB2

1
Institute of Chemical Engineering, Polish Academy of Sciences, ul. Bałtycka 5, 44-100 Gliwice, Poland
2
Faculty of Natural Sciences, Institute of Biology, Biotechnology and Environmental Protection, University of Silesia in Katowice, ul. Jagiellońska 28, 40-032 Katowice, Poland
*
Author to whom correspondence should be addressed.
Academic Editor: Beata Gutarowska
Materials 2021, 14(20), 6058; https://doi.org/10.3390/ma14206058
Received: 31 August 2021 / Revised: 6 October 2021 / Accepted: 8 October 2021 / Published: 14 October 2021
(This article belongs to the Special Issue Biodegradation or Biodeterioration of Non-metallic Materials)
This study focuses on the phenol biodegradation kinetics by Stenotrophomonas maltophilia KB2 in a nickel-contaminated medium. Initial tests proved that a nickel concentration of 33.3 mg·L−1 caused a cessation of bacterial growth. The experiments were conducted in a batch bioreactor in several series: without nickel, at constant nickel concentration and at varying metal concentrations (1.67–13.33 g·m−3). For a constant Ni2+ concentration (1.67 or 3.33 g·m−3), a comparable bacterial growth rate was obtained regardless of the initial phenol concentration (50–300 g·m−3). The dependence µ = f (S0) at constant Ni2+ concentration was very well described by the Monod equations. The created varying nickel concentrations experimental database was used to estimate the parameters of selected mathematical models, and the analysis included different methods of determining metal inhibition constant KIM. Each model showed a very good fit with the experimental data (R2 values were higher than 0.9). The best agreement (R2 = 0.995) was achieved using a modified Andrews equation, which considers the metal influence and substrate inhibition. Therefore, kinetic equation parameters were estimated: µmax = 1.584 h−1, KS = 185.367 g·m−3, KIS = 106.137 g·m−3, KIM = 1.249 g·m−3 and n = 1.0706. View Full-Text
Keywords: heavy metal inhibition; kinetic equations; nickel; phenol biodegradation heavy metal inhibition; kinetic equations; nickel; phenol biodegradation
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MDPI and ACS Style

Gąszczak, A.; Szczyrba, E.; Szczotka, A.; Greń, I. Effect of Nickel as Stress Factor on Phenol Biodegradation by Stenotrophomonas maltophilia KB2. Materials 2021, 14, 6058. https://doi.org/10.3390/ma14206058

AMA Style

Gąszczak A, Szczyrba E, Szczotka A, Greń I. Effect of Nickel as Stress Factor on Phenol Biodegradation by Stenotrophomonas maltophilia KB2. Materials. 2021; 14(20):6058. https://doi.org/10.3390/ma14206058

Chicago/Turabian Style

Gąszczak, Agnieszka, Elżbieta Szczyrba, Anna Szczotka, and Izabela Greń. 2021. "Effect of Nickel as Stress Factor on Phenol Biodegradation by Stenotrophomonas maltophilia KB2" Materials 14, no. 20: 6058. https://doi.org/10.3390/ma14206058

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