Biodegradation of polyacrylic and polyester polyurethane coatings by enriched microbial communities

Vargas-Suárez, Martín; Fernández-Cruz, Vianney; Loza-Tavera, Herminia

doi:10.1007/s00253-019-09660-y

Cited by 38 publications

(11 citation statements)

References 52 publications

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“…To investigate the enzymatic activity at the end of OxiTop cultivation, the samples were centrifuged for 5 min at 9000 rpm (Megafuge 16R, Thermo Scientific, Inc.) and analyzed for enzyme activity. Protease activity was measured spectrophotometrically (Libra S22−Biochrom Ltd., UK) as enzymatic casein hydrolysis by measuring released amino acids at 280 nm using the procedure reported by Vargas-Suaŕez et al 28 Esterase activity was measured spectrophotometrically (Infinite M200 PRO, Tecan Group Ltd.) by measuring released nitrophenol at 405 nm as a result of enzymatic hydrolysis of the three substrates, 4-nitrophenyl acetate (pNPA), 4nitrophenyl butyrate (pNPB), and 4-nitrophenyl dodecanoate (pNPD), as previously reported. 29 4-Nitrophenol (pNP) was used for calibration.…”

Section: ■ Experimental Sectionmentioning

confidence: 99%

Open-Cell Aliphatic Polyurethane Foams with High Content of Polysaccharides: Structure, Degradation, and Ecotoxicity

Skleničková

Vlčková

Abbrent

et al. 2021

ACS Sustainable Chem. Eng.

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Fully aliphatic (isocyanurate ring-based) polyesterether polyurethane (PUR) foams have been developed, and the influence of starch and 2-hydroxyethyl cellulose (HEC) additives on their structure, properties, ecotoxicity, and (abiotic and biotic) degradation has been studied. These PUR foams designed as hydrophilic open-porous materials are predisposed to enzymatic hydrolysis with potential application as cellular carriers and an alternative nutrient source for activated sludge in wastewater treatment plants. In comparison to the neat (nonmodified) PUR foam, the PUR foams with incorporated starch and HEC modifiers exhibited a tougher character and a slightly increased open-cell content but on the other hand a significantly coarser cellular structure with much larger cell sizes and reduced water absorption. The progress of 6-week abiotic hydrolysis was characterized in detail, showing almost a complete decomposition of ester groups, a partial degradation of urethane linkages, and a fully intact isocyanurate ring. The extent of biodegradation by means of bacteria was similar for all tested PUR foams, while fungus biodegradation was more efficient in starch and HEC-modified PUR foams. The leachates from both starch-and HEC-modified foams exhibited somewhat higher ecotoxicity for higher organisms, here represented by Daphnia magna, due to higher contents of leached substances.

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Section: ■ Experimental Sectionmentioning

confidence: 99%

Open-Cell Aliphatic Polyurethane Foams with High Content of Polysaccharides: Structure, Degradation, and Ecotoxicity

Skleničková

Vlčková

Abbrent

et al. 2021

ACS Sustainable Chem. Eng.

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“…Moreover, our research group found that extracellular esterase activity from microbial communities selected from a landfill was higher when grown in a commercial acrylic dispersion (Bayhydrol®) than when grown in a non-acrylic polyurethane dispersion (Neorez®), used as sole carbon sources. Besides, an increase in FTIR's carbonyl signal when the polymer was exposed to the selected microbial communities supports esterase activity participation in AP biodegradation (Vargas-Suárez et al 2019). The role of lipases has also been studied in AP biodegradation.…”

Section: Esterasesmentioning

confidence: 93%

Current status on the biodegradability of acrylic polymers: microorganisms, enzymes and metabolic pathways involved

Gaytán

Burelo

Loza-Tavera

2021

Appl Microbiol Biotechnol

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Acrylic polymers (AP) are a diverse group of materials with broad applications, frequent use, and increasing demand. Some of the most used AP are polyacrylamide, polyacrylic acid, polymethyl methacrylates, and polyacrylonitrile. Although no information for the production of all AP types is published, data for the most used AP is around 9 MT/year, which gives an idea of the amount of waste that can be generated after products' lifecycles. After its lifecycle ends, the fate of an AP product will depend on its chemical structure, the environmental setting where it was used, and the regulations for plastic waste management existing in the different countries. Even though recycling is the best fate for plastic polymer wastes, few AP can be recycled, and most of them end up in landfills. Because of the pollution crisis the planet is immersed, setting regulations and developing technological strategies for plastic waste management are urgent. In this regard, biotechnological approaches, where microbial activity is involved, could be attractive eco-friendly strategies. This mini-review describes the broad AP diversity, their properties and uses, and the factors affecting their biodegradability, underlining the importance of standardizing biodegradation quantification techniques. We also describe the enzymes and metabolic pathways that microorganisms display to attack AP chemical structure and predict some biochemical reactions that could account for quaternary carbon-containing AP biodegradation. Finally, we analyze strategies to increase AP biodegradability and stress the need for more studies on AP biodegradation and developing stricter legislation for AP use and waste control. Key points• Acrylic polymers (AP) are a diverse and extensively used group of compounds.• The environmental fates and health effects of AP waste are not completely known.• Microorganisms and enzymes involved in AP degradation have been identified.• More biodegradation studies are needed to develop AP biotechnological treatments.

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“…More recently degradation of polyester PU was attempted using enriched microbial communities. The results of this study show that microbial consortia grow better than individual members of the community in media with NeoRez R-9637 (a polyester PU) as the sole carbon source, opening up the possibility of novel approaches in PU degradation ( Vargas-Suárez et al, 2019 ).…”

Section: Microbial and Enzymatic Degradation Of Plasticsmentioning

confidence: 95%

Progressing Plastics Circularity: A Review of Mechano-Biocatalytic Approaches for Waste Plastic (Re)valorization

Nikolaivits

Pantelic

Azeem

et al. 2021

Front. Bioeng. Biotechnol.

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Biodegradation of polyacrylic and polyester polyurethane coatings by enriched microbial communities

Cited by 38 publications

References 52 publications

Open-Cell Aliphatic Polyurethane Foams with High Content of Polysaccharides: Structure, Degradation, and Ecotoxicity

Open-Cell Aliphatic Polyurethane Foams with High Content of Polysaccharides: Structure, Degradation, and Ecotoxicity

Current status on the biodegradability of acrylic polymers: microorganisms, enzymes and metabolic pathways involved

Progressing Plastics Circularity: A Review of Mechano-Biocatalytic Approaches for Waste Plastic (Re)valorization

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