scholarly journals Identification and characterization of low density polyethylene-degrading bacteria isolated from soils of waste disposal sites

2020 ◽  
Author(s):  
Lalina Maroof ◽  
Ibrar Khan ◽  
Han Sang Yoo ◽  
Suji Kim ◽  
Hong-Tae Park ◽  
...  
Keyword(s):  
Waste Disposal ◽  
Low Density Polyethylene ◽  
Low Density ◽  
Degrading Bacteria ◽  
Identification And Characterization

scholarly journals The Effect of Polymer Waste Addition on the Compressive Strength and Water Absorption of Geopolymer Ceramics

2021 ◽  
Vol 11 (8) ◽  
pp. 3540
Author(s):  
Numfor Linda Bih ◽  
Assia Aboubakar Mahamat ◽  
Jechonias Bidossèssi Hounkpè ◽  
Peter Azikiwe Onwualu ◽  
Emmanuel E. Boakye
Keyword(s):  
Public Health ◽  
Compressive Strength ◽  
Fracture Surface ◽  
Water Absorption ◽  
Chemical Bonding ◽  
Low Density Polyethylene ◽  
Low Density ◽  
Polymer Waste ◽  
Pull Out

The quantity of polymer waste in our communities is increasing significantly. It is therefore necessary to consider reuse or recycling waste to avoid an increase in the risk to public health. This project is aimed at using pulverized low-density polyethylene (LDPE) waste as a source to reinforce and improve compressive strength, and to reduce the water absorption of geopolymer ceramics (GC). Clay:LDPE composition consisting of 5%, 10%, and 15% LDPE was geopolymerized with an NaOH/Na2SiO3 solution and cured at 30 °C and 50 °C. Characterization of the geopolymer samples was carried out using XRF and XRD. The microstructure was analyzed by SEM and chemical bonding by FTIR. The SEM micrographs showed LDPE particle pull-out on the geopolymer ceramics’ fracture surface. The result showed that the compressive strength increases with the addition of pulverized polymer waste compared to the controlled without LDPE addition. Water absorption decreased with an increase in LDPE addition in the geopolymer ceramics composite.

Shear characterization of CaCO3-filled linear low density polyethylene

1988 ◽  
Vol 27 (2) ◽  
pp. 172-178 ◽  
Author(s):  
S. Ottani ◽  
A. Valenza ◽  
F. P. La Mantia
Keyword(s):  
Low Density Polyethylene ◽  
Low Density ◽  
Linear Low Density Polyethylene

Oxidative Ageing and Structural Characterization of Naturally Weathered Low Density Polyethylene Films

2020 ◽  
Vol 62 (4) ◽  
pp. 416-426
Author(s):  
N. H. Benmiloud ◽  
S. F. Chabira ◽  
A. H. Bhat ◽  
Y. K. Dasan ◽  
M. Sebaa
Keyword(s):  
Structural Characterization ◽  
Low Density Polyethylene ◽  
Low Density ◽  
Polyethylene Films ◽  
Oxidative Ageing

Characterization of antioxidant low density polyethylene/polyaniline blends prepared via extrusion

2012 ◽  
Vol 135 (2-3) ◽  
pp. 903-911 ◽  
Author(s):  
Ashveen V. Nand ◽  
Sudip Ray ◽  
Jadranka Travas-Sejdic ◽  
Paul A. Kilmartin
Keyword(s):  
Low Density Polyethylene ◽  
Low Density

scholarly journals Molecular Characterization of Low-Density Polyethene (LDPE) Degrading Bacteria and Fungi from Dandora Dumpsite, Nairobi, Kenya

2018 ◽  
Vol 2018 ◽  
pp. 1-10 ◽  
Author(s):  
Christabel Ndahebwa Muhonja ◽  
Gabriel Magoma ◽  
Mabel Imbuga ◽  
Huxley Mae Makonde
Keyword(s):  
Bacillus Cereus ◽  
Aspergillus Oryzae ◽  
Bacterial Degradation ◽  
Low Density ◽  
Optimum Growth ◽  
Alkane Hydroxylase ◽  
Fungal Isolates ◽  
Degrading Bacteria ◽  
Bacteria And Fungi

This study aimed at molecular and biochemical characterization of low-density polyethene (LDPE) degrading fungi and bacteria from Dandora dumpsite, Nairobi. Twenty bacterial and 10 fungal isolates were identified using 16S rDNA and 18S rDNA sequences for bacteria and fungi, respectively. The highest fungal degradation was attributed to Aspergillus oryzae strain A5,1 while the highest bacterial degradation was attributed to Bacillus cereus strain A5,a and Brevibacillus borstelensis strain B2,2, respectively. Isolates were screened for their ability to produce extracellular laccase and esterase; Aspergillus fumigatus strain B2,2 exhibited the highest presence of laccase (15.67 mm) while Aspergillus oryzae strain A5,1 exhibited the highest presence of esterase (14.33 mm). Alkane hydroxylase-encoding genes were screened for using primer AlkB 1 which amplified the fragment of size 870 bp. Four bacterial samples were positive for the gene. Optimum growth temperature of the fungal isolates was 30°C. The possession of laccase, esterase, and alkane hydroxylase activities is suggested as key molecular basis for LDPE degrading capacity. Knowledge of optimum growth conditions will serve to better utilize microbes in the bioremediation of LDPE. The application of Aspergillus oryzae strain A5,1 and Bacillus cereus strain A5,a in polyethene degradation is a promising option in this kind of bioremediation as they exhibited significantly high levels of biodegradation. Further investigation of more alkane degrading genes in biodegrading microbes will inform the choice of the right microbial consortia for bioaugmentation strategies.

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