Study of environmental biodegradation of LDPE films in soil using optical and scanning electron microscopy

Mumtaz, Tabassum; Khan, M. R.; Hassan, Mohd Ali

doi:10.1016/j.micron.2010.02.008

Cited by 53 publications

(25 citation statements)

References 27 publications

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“…Soil-buried LDPE showed active microbial growth on LDPE in 7-9 months, and surface deterioration was confirmed within 17-22 months as determined by SEM analysis (Mumtaz et al 2010). Abrusci et al (2011) tested the biodegradability of photo-degraded polyethylene through Bacillus cereus, B. megaterium, B. subtilis and Brevibacillus borstelensis at 30 and 45 °C.…”

Section: Polyethylenementioning

confidence: 99%

Review on the current status of polymer degradation: a microbial approach

Pathak

Bithel

2017

Bioresour. Bioprocess.

557

241

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Inertness and the indiscriminate use of synthetic polymers leading to increased land and water pollution are of great concern. Plastic is the most useful synthetic polymer, employed in wide range of applications viz. the packaging industries, agriculture, household practices, etc. Unpredicted use of synthetic polymers is leading towards the accumulation of increased solid waste in the natural environment. This affects the natural system and creates various environmental hazards. Plastics are seen as an environmental threat because they are difficult to degrade. This review describes the occurrence and distribution of microbes that are involved in the degradation of both natural and synthetic polymers. Much interest is generated by the degradation of existing plastics using microorganisms. It seems that biological agents and their metabolic enzymes can be exploited as a potent tool for polymer degradation. Bacterial and fungal species are the most abundant biological agents found in nature and have distinct degradation abilities for natural and synthetic polymers.

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Section: Polyethylenementioning

confidence: 99%

Review on the current status of polymer degradation: a microbial approach

Pathak

Bithel

2017

Bioresour. Bioprocess.

557

241

View full text Add to dashboard Cite

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“…Furthermore, Kapanen et al [25] described that the photo-degradation made the surfaces hydrophilic and these surfaces enhanced their affinity to microbes. Similarly, an out door soil burial test was carried out by Mumtaz et al [26,27] to evaluate the degradation of commercially available LDPE carrier bags in soil through the inhabitant microbes. …”

Section: Microscopymentioning

confidence: 99%

Studies on biodegradation of LDPE film in the presence of potential bacterial consortia enriched soil

Negi¹,

Gupta²,

Zaidi³

et al. 2011

Biologija

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Low density polyethylene (LDPE) is an important commodity plastic and has a wide applicability in the modern era. In virtue of their wide applicability, the generation of the huge plastic waste became a conundrum for environment and public health. Consequently, the present study was conducted for the microbial degradation of LDPE film in natural conditions using mixture of potential polymer degrading consortia. For this purpose, the talc based formulation of bacterial consortia was inoculated into soil with LDPE film for the period of three months. Fourier transform infrared spectroscopy (FT-IR) in combination with SEM revealed that the consortia incurred significant surfacial degradation of LDPE film, introduction of hydroxyl (-OH) functionality and significant shifts in fingerprint region, respectively. The potential of the consortia towards degradation of LDPE has further been ascertained through change in bulk structural characteristics using differential scanning calorimetry (DSC). Moreover, the comparative in situ biodegradation study of LDPE film in laboratory and natural conditions indicates that environmental factors like sun-light, temperature and rainfall may enhance the rate of biodegradation of the polymer in nature.

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“…A large body of evidence has shown that plastics can persist in the environment for hundreds of years often as harmful microscopic particles that are known to be dangerous to the environment, especially for marine ecosystems (Galgani et al 2000;Mumtaz et al 2010). They are also produced from petrochemical sources that may be depleted and take millions of years to be renewed.…”

Section: Introductionmentioning

confidence: 99%

Statistical physical and nutrient optimization of bioplastic polyhydroxybutyrate production by Cupriavidus necator

Aramvash

Shahabi

Aghjeh

et al. 2015

Int. J. Environ. Sci. Technol.

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Polyhydroxyalkanoates are biodegradable polymer materials that accumulate in numerous bacteria. The polyhydroxybutyrate is the most common type of polyhydroxyalkanoates, which potentially serves as precursor for bioplastic production. The most extensively studied polyhydroxybutyrate producing bacteria is Cupriavidus necator due to its capability to accumulate large amounts of this biopolymer in simple culture medium. Accumulation of polyhydroxyalkanoates granules in the cytoplasm of C. necator significantly depended on pH, aeration, carbon sources, nitrogen sources, and minerals in the culture medium. In the present study, the effect of both nutritional and physical variables on polyhydroxybutyrate production was investigated in order to optimize these conditions. At first, on the basis of one-factor-at-a-time experiments, fructose and ammonium chloride were found to be the most suitable sources of carbon and nitrogen for biopolymer production. Then the most significant factors affecting granules accumulation were recognized as fructose, agitation speed, KH 2 PO 4 , and initial pH using the Plackett-Burman and central composite design. ANOVA analysis showed significant interaction between fructose and agitation speed. After optimization of the medium, compositions for polyhydroxybutyrate production were determined as follows: fructose 35 g/L, KH 2 PO 4 1.75 g/L, MgSO 4 Á7H 2 O 1.2 g/L, citric acid 1.7 g/L, trace element 10 mL/L, initial pH = 7, and agitation speed 175 rpm. Under this optimal culture conditions, the maximum yield of PHB was 7.48 g/L. The present strategies included in this study could be used for PHB production by this bacterium. These results are the highest values of PHB ever obtained from batch culture of C. necator reported so far.

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Study of environmental biodegradation of LDPE films in soil using optical and scanning electron microscopy

Cited by 53 publications

References 27 publications

Review on the current status of polymer degradation: a microbial approach

Review on the current status of polymer degradation: a microbial approach

Studies on biodegradation of LDPE film in the presence of potential bacterial consortia enriched soil

Statistical physical and nutrient optimization of bioplastic polyhydroxybutyrate production by Cupriavidus necator

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