Enhanced microbial degradation of PET and PS microplastics under natural conditions in mangrove environment.

Autor: Auta HS; Institute of Biological Sciences, Faculty of Science, University of Malaya, Kuala Lumpur, Malaysia; Centre for Research in Waste Management, Faculty of Science, University of Malaya, Kuala Lumpur, Malaysia; Department of Microbiology, Federal University of Technology, Minna, Nigeria., Abioye OP; Department of Microbiology, Federal University of Technology, Minna, Nigeria., Aransiola SA; Bioresources Development Centre, National Biotechnology Development Agency, Ogbomoso, Nigeria. Electronic address: blessedabiodun@gmail.com., Bala JD; Department of Microbiology, Federal University of Technology, Minna, Nigeria., Chukwuemeka VI; Department of Animal Biology, Federal University of Technology, Minna, Nigeria., Hassan A; Institute of Biological Sciences, Faculty of Science, University of Malaya, Kuala Lumpur, Malaysia; Centre for Research in Waste Management, Faculty of Science, University of Malaya, Kuala Lumpur, Malaysia; Department of Biological Sciences, Federal University, Kashere, Gombe, Nigeria., Aziz A; Faculty of Marine Sciences, Lasbela University of Agriculture, Water & Marine Sciences, Uthal, Balochistan, Pakistan., Fauziah SH; Institute of Biological Sciences, Faculty of Science, University of Malaya, Kuala Lumpur, Malaysia; Centre for Research in Waste Management, Faculty of Science, University of Malaya, Kuala Lumpur, Malaysia.
Jazyk: angličtina
Zdroj: Journal of environmental management [J Environ Manage] 2022 Feb 15; Vol. 304, pp. 114273. Date of Electronic Publication: 2021 Dec 10.
DOI: 10.1016/j.jenvman.2021.114273
Abstrakt: In-situ bioremediation of mangrove soil contaminated with polyethylene terephthalate (PET) and polystyrene (PS) microplastics was investigated using indigenous microbial consortium with adequate capacity to degrade the plastics. Eight (8) bacteria were isolated from plastic/microplastic-inundated mangrove soil and screened for the ability to degrade PET and PS microplastics. Optical density at 600 nm and colony forming unit counts were measured to evaluate the growth response of the microbes in the presence of PS and PET microplastics at different times of exposure. Structural and surface changes that occurred post biodegradation on the microplastics were determined through EDS and SEM analysis. The obtained results demonstrated the elongation and disappearance of peaks, suggesting that the microbial consortium could modify both types of microplastics. The overall results of the microplastic degradation showed varied degrees of weight loss after 90 experimental days, with the treated plot recorded 18% weight loss. The augmented soil was increased in the concentrations of Si S, and Fe and decreased in the concentrations of C, O, Na, Mg, Al, Cl, and K after bioremediation.
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Databáze: MEDLINE
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