Biodegradation of four polyolefin plastics in superworms (Larvae of Zophobas atratus) and effects on the gut microbiome.

Autor: Wang S; College of Resources and Environment, Shandong Agricultural University, Tai'an City, Shandong 271018, China., Yu H; College of Resources and Environment, Shandong Agricultural University, Tai'an City, Shandong 271018, China., Li W; College of Resources and Environment, Shandong Agricultural University, Tai'an City, Shandong 271018, China., Song E; College of Resources and Environment, Shandong Agricultural University, Tai'an City, Shandong 271018, China., Zhao Z; College of Plant Protection, Shanxi Agricultural University, Taigu, Shanxi 030800, China., Xu J; College of Chemistry and Material Science, Shandong Agricultural University, Tai'an City, Shandong 271018, China., Gao S; College of Plant Protection, Shandong Agricultural University, Tai'an City, Shandong 271018, China., Wang D; College of Resources and Environment, Shandong Agricultural University, Tai'an City, Shandong 271018, China. Electronic address: wangddnan@163.com., Xie Z; College of Resources and Environment, Shandong Agricultural University, Tai'an City, Shandong 271018, China. Electronic address: zhihongxie211@163.com.
Jazyk: angličtina
Zdroj: Journal of hazardous materials [J Hazard Mater] 2024 Sep 15; Vol. 477, pp. 135381. Date of Electronic Publication: 2024 Jul 30.
DOI: 10.1016/j.jhazmat.2024.135381
Abstrakt: Recent studies have demonstrated superworms (larvae of Zophobas atratus) ability to degrade polyethylene (PE), polystyrene (PS), polyvinyl chloride (PVC), and polypropylene (PP) within their digestive system. This study aimed to compare the ability of superworms to degrade the above four polyolefin plastics over a duration of 30 days. In this study, the degradation rate of PE was the highest, and the final average weight of superworms, as well as the final plastic mass loss consumed by them, significantly increased (73.38 % and 52.33 %, respectively) when PE was fed with wheat bran (1:1 [w/w]). FTIR and TGA indicated the occurrence of oxidation and biodegradation processes in the four polyolefin plastics when exposed to superworms. In addition, the molecular weights (Mw and Mn) of excreted polymer residues decreased by 3.1 % and 2.87 % in PE-fed superworms, suggesting that the depolymerization of PE was not entirely dependent on the gut microbial community. The analysis of the gut microbial communities revealed that the dominant microbial community were different for each type of plastic. The results indicate that the gut microbiome of superworms exhibited remarkable adaptability in degrading various types of plastics, and the intake preferences and efficiency of different plastics are associated with different dominant microbial community species.
Competing Interests: Declaration of Competing Interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2024 Elsevier B.V. All rights reserved.)
Databáze: MEDLINE
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