在土壤中亚利法性聚氨泡的生物降解:氨基酸结合和超分子结构的影响
Kateřina Skleničková1, Eliška Suchopárová2, Sabina Abbrent3
1Institute of Macromolecular Chemistry, Czech Academy of Sciences, Heyrovského nám. 2, Prague 6 162 06, Czech Republic; Department of Biochemistry and Microbiology, Faculty of Food and Biochemical Technology, University of Chemistry and Technology Prague, Technická 5, Prague 6 166 28, Czech Republic.
The Science of the total environment
|December 7, 2023
概括
具有链的聚氨 (PU) 泡显示出显著的生物降解. 胺连接通过改变结构来阻碍降解,强调需要精心设计材料以获得环保替代品.
科学领域:
- 聚合物科学 聚合物科学
- 环境科学 环境科学
- 微生物学 微生物学
背景情况:
- 聚氨 (PU) 泡是不可回收的热固体,需要可持续的废物管理解决方案.
- 提高PU泡的微生物降解性对于环保生产至关重要.
- 聚乙烯泡的生物降解性主要与链接有关,但其他因素仍未得到充分研究.
研究的目的:
- 为了研究带有和没有胺结合的亚利法性PU泡的有氧生物降解.
- 评估化学成分,超分子排列和细胞形态对PU泡生物降解性的影响.
- 评估PU泡降解对土壤微生物群落和酶活动的影响.
主要方法:
- 六个月的土壤埋葬试验,以评估有氧生物降解.
- 测量二氧化碳释放和土壤酶活动 (蛋白酶,酶,尿酶).
- 使用脂脂肪酸 (PLFA) 分析和16S rRNA/ITS2测序分析微生物群体组成的分析.
主要成果:
- 聚烯泡的矿化率为30-50%,表明土壤微生物的显著降解和利用.
- 乙链接很容易被裂开,而胺链接则抵抗微生物降解.
- 胺基连接改变了超分子网络,增加了硬片段,降低了生物降解性.
- 没有观察到毒性,因为微生物生物质没有受到影响.
结论:
- 聚烯泡可以被土壤微生物降解,作为营养和能源来源.
- 埃斯特链接是PU泡生物降解性的关键;胺链接阻碍了它.
- 材料设计必须考虑化学成分和结构性质,以开发可生物降解的PU泡.
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