Batch Biodegradation of Para-Nitrophenol Using Arthrobacter chlorophenolicus A6

Abstract

The present study reports the kinetics of p-nitrophenol (PNP) biodegradation by Arthrobacter chlorophenolicus A6 in batch shake flasks for initial PNP concentrations in the range of 25-225 mg l(-1). Results of batch growth kinetics of A. chlorophenolicus A6 at various initial PNP concentrations revealed that the culture followed substrate inhibition kinetics with estimated decay coefficient value of 0.0132 h(-1). Biokinetic constants involved in the process were estimated by fitting the experimental data to several substrate inhibition kinetics models available from the literature. Among the models tested, Webb model fitted the experimental data best with the least root mean square error value, and the estimated model constants values were μ = 0.161 h(-1), K (i) = 128 mg l(-1), K (s) = 60.15 mg l(-1), and K = 100 mg l(-1). In addition, observed and theoretical yield coefficients, maintenance energy, and specific growth rate of the culture at various initial PNP concentrations were also investigated in the study.

Draft Genome Sequence of Arthrobacter sp. Strain SPG23, a Hydrocarbon-Degrading and Plant Growth-Promoting Soil Bacterium

“…Members of the genus Arthrobacter have been associated with the degradation of compounds, such as 4-chlorophenol ( 1 ), polychlorinated biphenyls ( 2 , 3 ), pentachloronitrobenzene, ( 4 ), 2-nitrobenzoate ( 5 ), atrazine ( 6 ), 2,4-dinitrotoluene ( 7 ), para -nitrophenol ( 8 ), 4-bromophenol ( 9 ), phenanthrene, and phthalates ( 10 , 11 ). Genome sequence data indicate that several strains of Arthrobacter are capable of degrading aromatic compounds, including Arthrobacter sp.…”

Low temperature-calcined TiO2 for visible light assisted decontamination of 4-nitrophenol and hexavalent chromium from wastewater

“…There is a serious need for its degradation from the industrialized and agricultural effluents. The removals of NPs were investigated different remediation techniques 10–18 . Herein, visible light-driven heterogeneous photocatalytic is considered and will be employed for degrading PNP; because photocatalysis technology is an eco-friendly, green and sludge free remediation technique.…”

Microbial degradation kinetics and molecular mechanism of 2,6-dichloro-4-nitrophenol by a Cupriavidus strain

“…S2). This phenomenon is in accord with the microbial degradation of many aromatic compounds such as phenol (Wang et al, 2010), 4-chlorophenol (Sahoo et al, 2011a), 4nitrophenol (Sahoo et al, 2011b), 2C4NP (Min et al, 2018) and2,4,6-trinitrophenol (Shen et al, 2009). When strain CNP-8 grown on 2,6-DCNP at different concentration, the biomass yield coefficient reached the highest value when initial 2,6-DCNP concentration is 0.2 mM, and further increase substrate concentration resulted in the significant decrease of biomass yield coefficient (Fig.…”