Enhanced PE degradation and diversity of bacterial biofilm by applying organic fertilizer inoculated with mixed degrading bacteria

被引：0

作者：

Hou, Mengzong ^{[1
]}

Yang, Fan ^{[1
]}

Song, Lisha ^{[1
]}

Hu, Run ^{[1
]}

Liu, Qiang ^{[2
,3
]}

Zhang, Hong ^{[1
]}

Qi, Yanjiao ^{[1
]}

机构：

[1] Northwest Minzu Univ, Coll Chem Engn, Key Lab Util Environm Friendly Composite Mat & Bio, Key Lab Environm Friendly Composite Mat State Ethn, Lanzhou 730142, Peoples R China

[2] Lanzhou Univ Technol, State Key Lab Gansu Adv Nonferrous Met Mat, Lanzhou 730050, Gansu, Peoples R China

[3] Lanzhou Univ Technol, Sch Mat Sci & Engn, Lanzhou 730050, Gansu, Peoples R China

来源：

PROCESS BIOCHEMISTRY | 2025年 / 151卷

关键词：

Polyethylene; Mixed strain; Biodegradation; Soil microorganisms; MICROPLASTICS; ENVIRONMENT; SEA;

D O I：

10.1016/j.procbio.2025.02.004

中图分类号：

Q5 [生物化学]; Q7 [分子生物学];

学科分类号：

071010 ; 081704 ;

摘要：

The combined effect of degrading bacteria and organic fertilizers may have an impact on the degradation behaviour of plastics remaining in the soil. In this experiment, the degradation effect and biofilm characteristics of plastics in soil were investigated for 90 days by adding organic fertilizer inoculated with degrading bacteria for secondary fermentation. The results showed that plastics typically exhibited weak weight loss and surfacespecific changes after incubation. In terms of mass loss, the weight loss of the experimental group inoculated with the bacterial mixture was as high as 17.1 %, while the weight loss of the organic fertilizer not inoculated with degrading bacteria was only 6.2 %. In addition, the increase in carbon-oxygen functional groups and the change in oxygen/carbon ratio observed by XPS, FTIR, etc. indicate that plastics are gradually oxidized and degraded in soils while organic fertilizers inoculated with degrading bacteria have been applied. In addition, the addition of organic fertilizers inoculated with degrading bacteria to soil containing plastics enriched the diversity of bacterial biofilm communities on the surface of the plastics, with the main strains being Bacteroidota, Firmicutes and Proteobacteria.The results of this study may provide a theoretical basis for efficient plastic degradation and pollution control in soil.

引用

页码：137 / 145

页数：9