Research Progress on Biodegradation of Polyethylene (PE)

doi:10.11924/j.issn.1000-6850.casb2023-0859

Abstract

Abstract:

Polyethylene (PE), as one of the most used plastics in the world, has widely existed in the natural environment because of its wear-resistant, high molecular weight and indestructible properties. PE would break down into microplastics (MPs) and accumulate in large quantities, and currently MPs has become an important pollutant that affects the ecosystem. Currently, many studies have been demonstrated that PE could be partially degraded, but further research is needed in screening of microorganisms or enzymes that could completely degrade PE and construct a complete biodegradation pathway for PE. Therefore, this paper summarizes the classification, recycle methods and characterization methods of PE, microorganisms and enzymes that degrade PE, biodegradation pathways and influencing factors, and proposes future research directions of PE biodegradation. These findings provide theoretical basis for the degradation mechanism of PE.

Key words: polyethylene, microplastics, characterization methods, microorganisms, enzymes, biodegradation, polythene degrading strains, degradation pathways

SHI Yueqi, YE Guangbin, SUN Shanshan, GE Jingping. Research Progress on Biodegradation of Polyethylene (PE)[J]. Chinese Agricultural Science Bulletin, 2024, 40(21): 69-77.

Figures/Tables 7

References 39

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菌株名称	菌株来源	培养时间/d	降解特征	参考文献
Pseudomonas	土壤	120	重量降低7.2%	[11]
Methylobacterium radiotolerans、Methylobacterium fujisawaense、Lysinibacillus fusiformis	城市固体废物处置区	180	重量分别降低了42.87%、37.2% 和23.87%	[12]
Bacillus cereus、Brevibacillus borstelensis	地膜	56	质量分别损失了3.62%和1.2%	[13]
Alternaria altanata	海水	28	薄膜相对结晶度降低10.77%	[15]
Trichoderma viride、Aspergillus nomius	垃圾填埋场	45	重量降低了5.13%和6.63%	[16]
Aspergillus oryzae	垃圾场	112	重量减轻5.1%	[17]
Aspergillus flavus	蜡蛾肠道	28	分子量降低	[18]
Streptomyces albogriseolus	土壤	30	塑料表面有破损和孔洞	[19]
Rhodococcous	风化塑料	34	重量减轻1%，PE表面有凹坑	[20]

菌株名称	菌株来源	培养时间/d	降解特征	参考文献
Pseudomonas	土壤	120	重量降低7.2%	[11]
Methylobacterium radiotolerans、Methylobacterium fujisawaense、Lysinibacillus fusiformis	城市固体废物处置区	180	重量分别降低了42.87%、37.2% 和23.87%	[12]
Bacillus cereus、Brevibacillus borstelensis	地膜	56	质量分别损失了3.62%和1.2%	[13]
Alternaria altanata	海水	28	薄膜相对结晶度降低10.77%	[15]
Trichoderma viride、Aspergillus nomius	垃圾填埋场	45	重量降低了5.13%和6.63%	[16]
Aspergillus oryzae	垃圾场	112	重量减轻5.1%	[17]
Aspergillus flavus	蜡蛾肠道	28	分子量降低	[18]
Streptomyces albogriseolus	土壤	30	塑料表面有破损和孔洞	[19]
Rhodococcous	风化塑料	34	重量减轻1%，PE表面有凹坑	[20]

菌株名称	菌株来源	培养时间/d	降解特征	参考文献
Bacillus sp.、Paenibacillus sp.	垃圾填埋场	60	干重降低了7.60%，平均颗粒直径降低了8.60%	[21]
Bacillus amyloliquefaciens、Bacillus velezensi、Enterococcus faecalis	大麦虫肠道	30	料薄膜使边缘破损，疏水性降低	[22]
Stenotrophomonas sp.、Achromobacter sp.	城市垃圾场	100	重量降低8%	[23]

菌株名称	菌株来源	培养时间/d	降解特征	参考文献
Bacillus sp.、Paenibacillus sp.	垃圾填埋场	60	干重降低了7.60%，平均颗粒直径降低了8.60%	[21]
Bacillus amyloliquefaciens、Bacillus velezensi、Enterococcus faecalis	大麦虫肠道	30	料薄膜使边缘破损，疏水性降低	[22]
Stenotrophomonas sp.、Achromobacter sp.	城市垃圾场	100	重量降低8%	[23]