Growth of microorganisms on insoluble polymers: Transformation of automobile tires

Faber, Marcel; Nickerson, Walter J.

doi:10.1007/bf01386710

Cited by 3 publications

(3 citation statements)

References 9 publications

(4 reference statements)

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“…Although it is not certain that optimal environmental conditions (particularly pH) for A. ferrooxidans were achieved in our experiments or in the actual monofills, our findings do not support a role for this organism in exothermic reactions associated with tyre shreds. Tyre material contains a variety of organic compounds, such as natural rubber, synthetic rubber and aromatic oils (including polycyclic aromatic hydrocarbons) that can be utilized by certain species of bacteria found in soil and water (Heisey and Papadatos 1995) and by fungi found in soil (Faber and Nickerson 1979). The majority of previously identified rubber degrading bacteria are Actinobacteria, such as Streptomyces sp., Nocardia sp.…”

Section: Discussionmentioning

confidence: 99%

“…Tyre material contains a variety of organic compounds, such as natural rubber, synthetic rubber and aromatic oils (including polycyclic aromatic hydrocarbons) that can be utilized by certain species of bacteria found in soil and water (Heisey and Papadatos 1995) and by fungi found in soil (Faber and Nickerson 1979). The majority of previously identified rubber degrading bacteria are Actinobacteria, such as Streptomyces sp., Nocardia sp.…”

Section: Discussionmentioning

confidence: 99%

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Bacterial communities of tyre monofill sites: growth on tyre shreds and leachate

Vukanti

Crissman

Leff

et al. 2009

Journal of Applied Microbiology

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Aims: To investigate bacterial communities of tyre monofill sites, colonization of tyre material by bacteria and the effect of tyre leachate on bacteria. Methods and Results: Culturable bacteria were isolated from buried tyre shreds and identified using fatty acid methyl ester analysis. Isolates belonged to taxonomic groups such as Bacilli, Actinobacteria, Clostridia, Flavobacteria, β and γ‐proteobacteria. For tyre material colonization experiments, Bacillus megatarium, Bacillus cereus, Hydrogenophaga flava, Janthinobacterium lividum, Cellulosimicrobium cellulans, Arthrobacter globiformis (isolated from tyre shreds or leachate at the study site); Escherichia coli and Acidithiobacillus ferrooxidans were used. Beakers containing tyre shreds and artificial rain water were inoculated with a given bacterial culture, incubated at room temperature and sampled at regular intervals. 4′,6‐diamidino‐2‐phenylindole (DAPI) staining followed by epifluorescent microscopy was used to enumerate bacteria in samples. Of the bacteria tested, B. megatarium, J. lividum, E. coli, C. cellulans and A. globiformis exhibited the most extensive colonization of the tyre shreds. However, the extent of colonization varied among bacteria. Response to tyre leachate was also examined using B. cereus and J. lividum. Both bacteria increased in abundance due to the addition of leachate. Conclusions: Bacteria associated with buried tyre shreds were identified and found to include typical soil and freshwater organisms. The majority of indigenous isolates grew on tyre material (or leachate) suggesting that they play an active role in the ecology of these sites and that their potential role in tyre degradation should be explored. Significance and Impact of the study: This study provides information on bacterial communities of tyre‐waste disposal sites, explores the interaction between tyre material and bacteria and identifies bacteria that could be involved in or employed for recycling tyre‐waste.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Bacterial communities of tyre monofill sites: growth on tyre shreds and leachate

Vukanti

Crissman

Leff

et al. 2009

Journal of Applied Microbiology

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“…A review of mineral oils in general (covering oils made from dewaxed paraffin‐based crude oils) found their biodegradability to range between 15% and 35% (Aluyor & Ori‐Jesu, 2009), thus slightly above what was observed in the present study. One study found indirect evidence that biodegradation of tire polymers occurs by a cometabolic pathway, which is dependent on the presence of a metabolizable carbon source (Faber & Nickerson, 1979). In addition to being slightly biodegradable itself, the presence of oils (although their bioavailability is likely limited) may thus increase biodegradability of rubber when present in TPs, compared to rubber by itself, by facilitating polymer biodegradation through a cometabolic pathway.…”

Section: Discussionmentioning

confidence: 99%

Assessing the Biodegradability of Tire Tread Particles and Influencing Factors

Nielsen,

Polesel,

Ahonen

et al. 2023

Enviro Toxic and Chemistry

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Abrasion of tire tread, caused by friction between vehicle tires and road surfaces, causes release of tire wear particles (TWPs) into various environmental compartments. TWPs contribute to chemical‐, microplastic‐, and particulate matter pollution. Their fate remains largely unknown, especially regarding the extent and form in which they persist in the environment. This study investigated 1) the biodegradability of tread particles (TPs) in the form of ground tire tread, 2) how accelerated UV‐weathering affect their biodegradability, and 3) which TP constituents are likely contributors to TP biodegradability based on their individual biodegradability. A series of closed bottle tests, with aerobic aqueous medium inoculated with activated sludge, were carried out for pristine TPs, UV‐weathered TPs, and selected TP constituents; natural rubber (NR), isoprene rubber (IR), butadiene rubber (BR), and treated distillate aromatic extracts (TDAE). Biodegradation was monitored by manometric respirometry quantifying biological oxygen consumption over 28 days. Pristine TP biodegradability was found to be 4.5%. UV‐weathered TPs showed higher biodegradability of 6.7% and 8.0% with similar and increased inoculum concentration, respectively. The observed TP biodegradation was mainly attributed to biodegradation of NR and TDAE, with individual biodegradability of 35.4% and 8.0%, respectively. IR and BR showed negligible biodegradability. These findings indicate biodegradability of individual constituents is decreased by a factor of 2 to 5 when compounded into TPs. Through scanning electron microscope (SEM) analysis, biodegradation was found to cause surface erosion. Processes of TP biodegradation are expected to change throughout their lifetime as new constituents are incorporated from the road and others degrade and/or leach out. Tire emissions likely persist as particles with an increased fraction of synthetic rubbers and carbon black.

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Microbial degradation of recalcitrant compounds and synthetic aromatic polymers

Faber¹

1979

Enzyme and Microbial Technology

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Growth of microorganisms on insoluble polymers: Transformation of automobile tires

Cited by 3 publications

References 9 publications

Bacterial communities of tyre monofill sites: growth on tyre shreds and leachate

Bacterial communities of tyre monofill sites: growth on tyre shreds and leachate

Assessing the Biodegradability of Tire Tread Particles and Influencing Factors

Microbial degradation of recalcitrant compounds and synthetic aromatic polymers

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