Study of microbes having potentiality for biodegradation of plastics

Ghosh, Swapan K.; Pal, Surendra; Ray, Sumanta

doi:10.1007/s11356-013-1706-x

Cited by 238 publications

(107 citation statements)

References 106 publications

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“…Dioxins can cause serious problems in the human endocrine hormone activity, thus becoming a major concern for the human health [5,6] and can cause very serious soil pollution. Therefore, under such circumstances degradation of plastic by microbes is one of the eco-friendly and innovative methods in the near future [7]. Biodegradation is an effective option for eco-friendly degradation of plastic waste.…”

Section: Introductionmentioning

confidence: 99%

Biodegradation of Polyethylene by Green Photosynthetic Microalgae

Kumar¹,

Gopal²,

Elumalai³

2017

J Bioremediat Biodegrad

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Keywords: Polyethylene; Biodegradation; Microalgae; SEM IntroductionPlastics (Polyethylene) are the synthetic organic polymers which are commonly produced from high density polyethylene, one of the petroleum derived product. The plastic carrier bags are routinely used for carrying groceries, clothing and other merchandises [1]. It was from late 1970s that the plastic carrier bags have become a common element in our day to day life in this globalized world. The increasing use of plastics, particularly packaging has become a significant source for environmental pollution and creating problems in solid waste management as well as lethal to wild life and human being due to its non-degradability in nature.It is estimated that around 500 billion plastic bags are being used every year worldwide. This widespread utilization is attributed to their cheapness and convenience to use. The vast majority of these bags are discarded as wastes usually after a single use. It has been revealed that after their entry into environment, plastic bags can persist up to 1000 years without being decomposed. Accumulation of plastic bag wastes causes environmental pollution that can be manifested in number of ways. Biological degradation is an attractive, recent and alternative approach to plastic waste management, which is generally a cheaper process, potentially much more efficient and does not produce any hazardous compounds, as in the case of conventional degradation [2]. Additionally, the microbial degradation of polyethylene sheets may yield commercial end products from their biomass [3].There are only three degradative methods including landfill, incineration and recycling are being followed on large scale basis. In the case of direct incineration, the plastics emit poisonous gases such as dioxins, carbon mono-oxide, NO x , SO x and heavy metals [4] in to the atmospheric air. However, as a result the remnants after these treatments causing severe damages to the environment. Landfill AbstractConventional methods of polyethylene degradation including incineration, landfill and chemical treatment are lethal to the neighboring environment by causing hazardous effects on living organisms. A better solution for the complete degradation of polyethylene has not yet been formulated. However, to solve this global issue biological mode of polyethylene degradation may be evaluated and developed in the upcoming future. In this research investigation, microalgae like green algae, blue-green algae and diatoms were isolated from the domestic polyethylene bags dumped in the suburban water bodies and studied for its potency on deterioration of polyethylene. The dumped waste polyethylene bags were collected from three different sites of (Maduravoyal, Vanagaram and Poonamallee) Chennai, Tamil Nadu, India. Colonized mat of microalgae were isolated from the polyethylene sheets and the most dominant three different groups of microalgae were selected for the biological treatment of LD (low density) and HD (high density) polyethylene sheets. The most dom...

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Section: Introductionmentioning

confidence: 99%

Biodegradation of Polyethylene by Green Photosynthetic Microalgae

Kumar¹,

Gopal²,

Elumalai³

2017

J Bioremediat Biodegrad

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“…When metabolized by micro-organisms, the substrate is stored intercellularly as source reserve of energy [25] e carbon [44]. This buildup occurs in the cytoplasm of cell in the form of granules, with diameters ranging from 0.2 µm to 0.5 µm [2].…”

Section: Phb Synthesismentioning

confidence: 99%

“…Additionally, when making blends there is the possibility of incorporating cheaper polymers in relation to PHB, reducing costs and improving its mechanical properties [15], [44]. The introduction of additives, such as, nucleating agents, plasticizers, lubricants, antioxidants and photostabilizers, is another approach.…”

Section: Phb and Improvement Measuresmentioning

confidence: 99%

From Obtaining to Degradation of PHB:Material Properties. Part I

et al. 2017

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This paper presents a review of the chemical, physical and morphological characteristics, as well as the existing applications and mechanisms for the production of poly (3-hydroxybutyrate). This biopolymer, which is obtained from renewable sources, degrades when exposed in biologically active environments and is biocompatible, that is, it is not rejected by the human body in health applications. However, in spite of presenting similar properties with some conventional plastics, the PHB exhibits fragile behavior and thermal instability when processed. The literature proposes the use of blends, the development of copolymers or the insertion of additives in an attempt to improve the mechanical and thermal properties of PHB. Key words: Biopolymers; polyhydroxyalkanoates (PHA); Polyhydroxybutyrate (PHB). Universidad EAFIT 269|From Obtaining to Degradation of PHB: Material Properties. Part I De la obtención a la degradación de PHB: Propiedades del material. Parte I ResumenEste artículo presenta una revisión de las características químicas, físicas y morfológicas, así como las aplicaciones y mecanismos existentes para la producción de poli(3-hidroxibutirato). Este biopolímero, que se obtiene a partir de fuentes renovables, se degrada cuando se expone en ambientes biológicamente activos y es biocompatible, es decir, no es rechazado por el cuerpo humano en aplicaciones de salud. Sin embargo, a pesar de presentar propiedades similares con algunos plásticos convencionales, el PHB exhibe comportamiento frágil e inestabilidad térmica cuando se procesa. La literatura propone el uso de mezclas, el desarrollo de copolímeros o la inserción de aditivos en un intento por mejorar las propiedades mecánicas y térmicas del PHB.Palabras clave: Biopolímeros; degradación de PHB; polihidroxialcanoato (PHA); polihidroxibutirato (PHB).

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“…The microbial degradation of plastics has been reviewed by some studies [8][9][10], which have addressed the abiotic and biotic (microbial) degradation of a wide array of synthetic polymers. The actinomycete Rhodococcus ruber [11] and the fungus Penicillium simplicissimum [12] were shown to produce extracellular enzymes able to degrade PE, but also thethermophylic bacterium Brevibacillus borstelensis [13] and Streptomyces sp.…”

mentioning

confidence: 99%

“…Polyhydroxyalkanoates (PHA), among which polyhydroxybutyrate (PHB), are metabolized by several microorganisms; PHA depolymerases have been detected in Pseudomonas stutzeri, Alcaligenes faecalis and Streptomyces sp. [8,10,15,16]. PHA-degrading fungi have been isolated from soil and marine environments and belong mostly to Basidiomycetes, Deuteromycetes (Penicillium and Aspergillus) and Ascomycetes [7].…”

mentioning

confidence: 99%

Plastic Degrading Microorganisms as a Tool for Bioremediation of Plastic Contamination in Aquatic Environments

Caruso¹

2015

J Pollut Eff Cont

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Study of microbes having potentiality for biodegradation of plastics

Cited by 238 publications

References 106 publications

Biodegradation of Polyethylene by Green Photosynthetic Microalgae

Biodegradation of Polyethylene by Green Photosynthetic Microalgae

From Obtaining to Degradation of PHB:Material Properties. Part I

Plastic Degrading Microorganisms as a Tool for Bioremediation of Plastic Contamination in Aquatic Environments

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