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https://hdl.handle.net/1959.11/15544
Title: | Colonization and Biodegradation of Photo-Oxidized Low-Density Polyethylene (LDPE) by New Strains of 'Aspergillus' sp. and 'Lysinibacillus' sp. | Contributor(s): | Esmaeili, Atefeh (author); Pourbabaee, Ahmad Ali (author); Alikhani, Hossein Ali (author); Shabani, Farzin (author); Kumar, Lalit (author)![]() |
Publication Date: | 2014 | DOI: | 10.1080/10889868.2014.917269 | Handle Link: | https://hdl.handle.net/1959.11/15544 | Abstract: | The primary objective of this study was the isolation of low-density polyethylene (LDPE)-degrading microorganisms. Soil samples were obtained from an aged municipal landfill in Tehran, Iran, and enrichment culture procedures were performed using LDPE films and powder. Screening steps were conducted using linear paraffin, liquid ethylene oligomer, and LDPE powder as the sole source of carbon. Two landfill-source isolates, identified as 'Lysinibacillus xylanilyticus' XDB9 (T) strain S7-10F and 'Aspergillus niger' strain F1-16S, were selected as super strains. Photo-oxidation (25 days under ultraviolet [UV] irradiation) was used as a pretreatment of the LDPE samples without pro-oxidant additives. The PE biodegradation process was performed for 56 days in a liquid mineral medium using UV-irradiated pure LDPE films without pro-oxidant additives in the presence of the bacterial isolate, the fungal isolate, and the mixture of the two isolates. The process was monitored by measuring the fungal biomass, the bacterial growth, and the pH of the medium. During the process, the fungal biomass and the bacterial growth increased, and the pH of the medium decreased, which suggests the utilization of the preoxidized PE by the selected isolates as the sole source of carbon. Carbonyl and double bond indices exhibited the highest amount of decrement and increment, respectively, in the presence of the fungal isolate, and the lowest indices were obtained from the treatment of a mixture of both fungal and bacterial isolates. Fourier transform infrared (FT-IR), x-ray diffraction (XRD), and scanning electron microscopy (SEM) analyses showed that the selected isolates modified and colonized preoxidized pure LDPE films without pro-oxidant additives. | Publication Type: | Journal Article | Source of Publication: | Bioremediation Journal, 18(3), p. 213-226 | Publisher: | Taylor & Francis Inc | Place of Publication: | United States of America | ISSN: | 1547-6529 1088-9868 |
Fields of Research (FoR) 2008: | 050104 Landscape Ecology 050399 Soil Sciences not elsewhere classified 050303 Soil Biology |
Fields of Research (FoR) 2020: | 410206 Landscape ecology 410699 Soil sciences not elsewhere classified 410602 Pedology and pedometrics |
Socio-Economic Objective (SEO) 2008: | 829999 Plant Production and Plant Primary Products not elsewhere classified 829902 Plant Product Traceability and Quality Assurance (excl. Forest Products) 829901 Forest Product Traceability and Quality Assurance |
Socio-Economic Objective (SEO) 2020: | 269903 Plant product traceability and quality assurance (excl. forest products) 269902 Forest product traceability and quality assurance |
Peer Reviewed: | Yes | HERDC Category Description: | C1 Refereed Article in a Scholarly Journal |
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Appears in Collections: | Journal Article |
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