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- Title
Soot biodegradation by psychrotolerant bacterial consortia.
- Authors
Ali, Barkat; Sajjad, Wasim; Ilahi, Nikhat; Bahadur, Ali; Kang, Shichang
- Abstract
To probe the bioavailability of soot released into the atmosphere is pivotal to understanding their environmental impacts. Soot aerosol absorbs organic matter, creating a hot spot for biogeochemical transformation and the global carbon cycle. Soot primarily contains condensed aromatics chemically recalcitrant; however, oligotrophic microorganisms might use it as a nutritional source. This study investigated the influence of psychrotolerant bacterial consortia on soot. Significant increase in the bacterial biomass, reduction in water-insoluble organic carbon (OC) and elemental carbon (EC) in soot residues and increase in water-soluble OC in the filtrate signifies the use of soot as a carbon and nutritional source. The influence on morphology and composition of soot was reported using Fourier Transform Infrared Spectroscopy (FTIR), Scanning Electron Microscopy, and Energy Dispersive X-Ray analysis (EDX). The FTIR analysis showed significant variations in the pattern of soot spectra, suggesting degradation. Elemental analysis and EDX showed a reduction in carbon percentage. Besides, the reduction of optical density with incubation time signifies the OC and EC consumption. This study shows that soot can be a substrate and pivotal factor in the microbial food web. Nowadays, soot emission to the environment is growing; therefore, soot involvement in microbe-mediated processes should be closely focused.
- Subjects
CARBONACEOUS aerosols; SOOT; ORAL contraceptives; ENERGY dispersive X-ray spectroscopy; CARBON cycle; FOURIER transform infrared spectroscopy
- Publication
Biodegradation, 2022, Vol 33, Issue 4, p407
- ISSN
0923-9820
- Publication type
Article
- DOI
10.1007/s10532-022-09990-1