Studying the effect of biosilver nanoparticles on polyethylene degradation
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The current study is focussed on the silver nanoparticle (AgNP)-based degradation of polyethylene. Two kinds of polyethylenes were used—linear high-density polyethylene and branched low-density polyethylene. Owing to the demerits of chemically synthesized nanoparticles, the biological synthesis of AgNPs from Aspergillus oryzae was carried out. The AgNPs produced were used along with the culture broth for the degradation studies. This nanoparticle-based method for bioremediating the polyethylene proved to be successful since it could degrade 64.5% of low-density polyethylene (LDPE) and 44.4% of high-density polyethylene (HDPE) in 5 weeks. The action of nanoparticles on polyethylene wax emulsion caused the thinning of the fluid. The HDPE samples when subjected to FTIR exhibited bending and stretching of the C–H bonds which form the backbone of the linear polymer. The degraded LDPE showed formation of phenols, alcohols, ketones and other smaller compounds, indicating the breakdown of the branched plastic. The GC–MS studies of the nanoparticle-treated polyethylene revealed the liberation of esters, alcohols and alkenes in HDPE, and aldehydes, alkenes, cyano compounds, esters and alkanes in LDPE. The 100% concentration of the AgNPs-treated degradation products of polyethylene was found to be 34.36% toxic in Allium cepa when compared with 97.35% phytotoxicity of the polyethylene wax emulsion.
KeywordsPolyethylene Aspergillus oryzae Silver nanoparticles Biodegradation studies Phytotoxicity
We thank DST-CURIE laboratory, SPMVV, for providing us the instrumental facility required for the study.
Compliance with ethical standards
Conflict of interest
On behalf of all the authors, the corresponding author declares that there is no conflict of interest.
- Alvi S, Qazi A, I (2016) Survivability of polyethylene degrading microbes in the presence of titania nanoparticles. J Nanomater Mol Nanotechnol, 05(03). https://doi.org/10.4172/2324-8777.1000185
- Cenis JL (1992) Rapid extraction of fungal DNA for PCR amplification. Nucleic Acids Res 20(9):2380. Retrieved from https://www.ncbi.nlm.nih.gov/pubmed/1594460%2010 1 CrossRefGoogle Scholar
- Gu JD, Ford TE, Mitton DB, Mitchell R (2000) Microbial corrosion of metals. In: Uhlig corrosion handbook, 2nd Edn. Wiley, New YorkGoogle Scholar
- Kale SK, Deshmukh AG, Dudhare MS, Patil VB (2015) Microbial degradation of plastic: a review. J Biochem Tech 6(2):952–961 (ISSN: 0974-2328) Google Scholar
- Katarzyna Leja GL (2010) Polymer biodegradation and biodegradable polymers—a review. (2010) Pol J of Environ Stud 19(2):255–266Google Scholar
- Kumar S, Das M, Rebecca L, Sharmila J S (2013) Isolation and identification of LDPE degrading fungi from municipal solid waste. J Chem Pharm Res 5(3):78–81Google Scholar
- Patel KM, Tiwari A, Yadav M (2017) A review: LDPE-biodegradation using microbial consortium by the incorporation of super paramagnetic iron oxide nanoparticle (SPION) as the enhancer for biodegradation. Int J Adv Eng Res Dev 4(6)Google Scholar
- Robinson J, Demmitt B, Collins T, Gorey T, Posgai R, VARMA RS, Hussain S, Rowe J (2011) Green synthesized silver nanoparticles exhibit reduced toxicity to mammalian cells and retain antimicrobial activity. Presented at ACS National Meeting, Anahein, pp 27–31Google Scholar
- Sangappa M, Thiagarajan P (2012) Mycobiosynthesis and characterization of silver nanoparticles from aspergillus niger: a soil fungal isolate—volume 1, 2, April, 2012, IJLBPRGoogle Scholar
- Sasikumar SRC (2015) Efficacy of microbial consortium on degradation of low density polythene material through FTIR spectroscopy. IJIRST Int J Innov Res Sci Technol, 2. Retrieved from http://www.ijirst.org
- Vigneshwaran N, Ashtaputre N, Varadarajan P, Nachane R, Paralikar K et al. (2007) Biological synthesis of silver nanoparticles using the fungus Aspergillus flavus. Mater Lett 61(6):1413–1418. https://doi.org/10.1016/j.matlet.2006.07.042