从土壤中分离出来的细菌将低密度聚乙烯降解为生长和聚酸酸合成
Intira Khumthong1, Wilailak Siripornadulsil1, Surasak Siripornadulsil1
1Department of Microbiology, Faculty of Science, Khon Kaen University, Khon Kaen, 40002, Thailand.
Journal of environmental management
|March 28, 2025
概括
从塑料污染的土壤中分离出来的细菌可以降解低密度聚乙烯 (LDPE). 这些微生物分解LDPE,将其转化为聚酸酸 (PHA) 生物聚合物,为塑料废物提供可持续的解决方案.
科学领域:
- 环境微生物学 环境微生物学
- 生物技术是生物技术.
- 聚合物科学 聚合物科学
背景情况:
- 来自食品包装的低密度聚乙烯 (LDPE) 是微塑料污染和塑料垃圾的主要来源.
- 有效的生物降解策略对于缓解环境塑料积累至关重要.
研究的目的:
- 识别和描述能够降解LDPE的土壤细菌.
- 研究这些细菌对LDPE降解的酶机制和副产品.
主要方法:
- 从塑料污染的土壤中分离和培养细菌.
- 在16周内测量体重减轻的LDPE降解测试.
- 福里埃变换红外光谱 (FTIR) 和场辐射扫描电子显微镜 (FESEM) 用于化学和表面分析.
- 酶活性测定 (基基酶,酒精脱酶,脂酶).
- 聚氨酸 (PHA) 的产量量化.
主要成果:
- 一个细菌联盟和Chitinophaga oryzae NT1-2实现了显著的LDPE减肥 (21.97%和16.14%).
- 在FTIR分析中,在降解的LDPE上发现了新的功能组 (化物,,碳酸盐).
- 在经过处理的LDPE薄膜上,FESEM显示表面粗,槽和裂.
- 像基氧酶和脂酶这样的特定酶在某些细菌菌株中表现出高活性.
- 降解细菌产生PHA,其中C. oryzae NT1-2产生了最高的量 (26.27毫克PHA/g葡萄糖).
结论:
- 从受污染的土壤中分离出来的细菌可以通过酶来降解LDPE.
- 这些细菌的LDPE降解导致PHA生物聚合物的产生.
- 这种微生物降解为环境可持续性和从塑料垃圾中回收资源提供了一个有希望的途径.
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