Biodegradation of Poly(lactic acid) in Soil Microcosms at Ambient Temperature: Evaluation of Natural Attenuation, Bio-augmentation and Bio-stimulation

Satti, Sadia Mehmood; Shah, Aamer Ali; Marsh, Terence L.; Auras, Rafael

doi:10.1007/s10924-018-1264-x

Cited by 71 publications

(44 citation statements)

References 59 publications

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“…A significant rate of mineralization of PLA films was observed upon bioaugmentation of Sphingobacterium sp. strain S2 in microcosms and no toxic effect of PLA degradation products was observed on soil health, as indicated by measuring nitrification activity in soil (Satti et al 2018). In continuation to our previous work, we evaluated the enzymatic machinery involved in PLA hydrolysis and specifically focused on production and characterization of lipase from Sphingobacterium sp.…”

Section: Microbial Degradation Of Polyester‐based Biodegradable Plasticsmentioning

confidence: 99%

Polyester‐based biodegradable plastics: an approach towards sustainable development

Satti

Shah

2020

Lett Appl Microbiol

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Significance and Impact of the Study: Polyester-based BPs considered as a solution to current plastic waste problem as well as leading polymers in terms of biodegradability and sustainability has been critically discussed. The role of microorganisms and their enzymes involved in the biodegradation of these polymers and ecotoxicological impact of degradation products of BPs on soil microbial community and biogeochemical cycles has also been described. This report will provide an insight on the key research areas to bridge the gap for development of simulated systems as an effective and emerging strategy to divert the overflow of plastic in the environment as well as for the greener solution to the plastic waste management problems. AbstractNon-degradability of conventional plastics, filling of landfill sites, raising water and land pollution and rapid depletion of fossil resources have raised the environmental issues and global concerns. The current demand and production of plastics is putting immense pressure on fossil resources, consuming about 6% of the global oil and is expected to grow up to 20%. The polyester-based biodegradable plastics (BPs) are considered as a remedy to the issue of plastics waste in the environment. BPs appear to manage the overflow of plastics by providing new means of waste management system and help in securing the non-renewable resources of nature. This review comprehensively presents the environmental burdens due to conventional plastics as well as production of polyester-based BPs as an alternative to conventional commodity plastics. The diversity of micro-organisms and their enzymes that degrade various polyesterbased BPs (PLA, PCL, PHB/PHBV and PET) has also been described in detail. Moreover, the impact of plastics degradation products on soil ecology and ecosystem functions has critically been discussed. The report ends with special focus on future recommendations for the development of sustainable waste management strategies to control pollution due to plastics waste. Letters in Applied Microbiology ISSN 0266-8254Packaging, compost bags and agricultural mulching films Li et al. (2015) Letters in Applied Microbiology 70, 413--430

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Section: Microbial Degradation Of Polyester‐based Biodegradable Plasticsmentioning

confidence: 99%

Polyester‐based biodegradable plastics: an approach towards sustainable development

Satti

Shah

2020

Lett Appl Microbiol

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“…So far, P L LA‐based medical devices are used in the clinical applications including BioScrew®, Bio‐Anchor®, and Absorb BVS® . Nevertheless, its inherent weakness, such as poor toughness and slow degradation and high crystallinity, should be improved for some specific applications . Previous studies have reported that it took about 2–3 years for P L LA to be totally degraded in the body .…”

Section: Introductionmentioning

confidence: 99%

“…[8][9][10] Nevertheless, its inherent weakness, such as poor toughness and slow degradation and high crystallinity, should be improved for some specific applications. 11,12 Previous studies have reported that it took about 2-3 years for PLLA to be totally degraded in the body. 3,13 Hence, it is of great importance to accelerate the hydrolytic degradation rate of PLLA and more desirably to be able to match the implant degradation rate with the healing rate of the wound.…”

Section: Introductionmentioning

confidence: 99%

Effect of segment structures on the hydrolytic degradation behaviors of totally degradable poly(L‐lactic acid)‐based copolymers

Fan

et al. 2019

J of Applied Polymer Sci

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A series of high‐molecular‐weight terpolymers named PTG‐b‐LG and PT‐b‐LG were synthesized based on the macroinitiators of PTG copolymers and PTMC, respectively. In vitro degradation of PTG‐b‐LG and PT‐b‐LG was carried out by immersing into PBS, in comparison with that of PLLA. Mass loss, water uptake, GPC, DSC, WAXD, and 1H NMR were examined for the degradation study. It was found that PTG‐b‐LG degraded faster than PT‐b‐LG and PLLA due to the Di‐random block structure, which had lower regularity of chain and lower crystallinity. The compositional changes appeared to be more complex, but the molar mass decreased owing to chain fragmentation caused by hydrolysis. Moreover, morphological changes were also observed during the degradation in all situations with the crystallization of by‐products and a preferential degradation of amorphous domains. Specifically, PTG‐b‐LG presented an adjustable degradation rate and may be used for the fabrication of totally biodegradation stents in the future. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 47887.

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“…[20][21][22]. The degree and rate of degradation also depends on the molecular and supramolecular structures of the polymer [23][24][25]; however, current knowledge is based on the experiments carried out mainly on the amorphous PLA materials degraded under laboratory or natural conditions [26,27]. The presented results from composting tests have demonstrated that materials made from PLA can be degraded after several weeks.…”

Section: Introductionmentioning

confidence: 99%

Influence of Various Climatic Conditions on the Structural Changes of Semicrystalline PLA Spun-Bonded Mulching Nonwovens during Outdoor Composting

Puchalski

Siwek

Panayotov

et al. 2019

Preprint

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This study analyzed the structural changes of semicrystalline polylactide (PLA) in the form of spun-bonded mulching nonwoven, during outdoor composting. The investigation was carried out at the microstructural, supramolecular and molecular levels using scanning electron microscopy (SEM), wide-angle X-ray diffraction (WAXD) and the viscosity method, respectively. The results showed the varying degree of influence of the climatic condition, prepared compost mixtures and time on the molecular, supramolecular and micromorphological structure of PLA spun-bonded mulching nonwoven and its degradation rate. The obtained experimental results revealed how the popular outdoor composting method, realized under two different European climatic conditions (in Poland and in Bulgary), affects the degradation of PLA nonwoven, designed for agriculture use.

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Biodegradation of Poly(lactic acid) in Soil Microcosms at Ambient Temperature: Evaluation of Natural Attenuation, Bio-augmentation and Bio-stimulation

Cited by 71 publications

References 59 publications

Polyester‐based biodegradable plastics: an approach towards sustainable development

Polyester‐based biodegradable plastics: an approach towards sustainable development

Effect of segment structures on the hydrolytic degradation behaviors of totally degradable poly(L‐lactic acid)‐based copolymers

Influence of Various Climatic Conditions on the Structural Changes of Semicrystalline PLA Spun-Bonded Mulching Nonwovens during Outdoor Composting

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