研究乙烯的连续无生物和生物降解的研究
Laurie Calarnou1, Mounir Traïkia2, Martin Leremboure1
1Université Clermont Auvergne, Clermont Auvergne INP, CNRS, Institut de Chimie (ICCF), F-63000 Clermont-Ferrand, France.
无生物降解为微生物分解的乙烯 (SBR) 提供了原料. 陈旧的SBR薄膜显示了特定细菌的增强生物降解,与原始材料不同.
科学领域:
- 环境科学 环境科学
- 聚合物科学 聚合物科学
- 微生物学 微生物学
背景情况:
- 乙烯 (SBR) 是轮胎跑道的关键组成部分.
- 轮胎磨损会将SBR颗粒释放到环境中.
- 了解SBR退化对于环境命运评估至关重要.
研究的目的:
- 为了研究SBR.的非生物 (光和热) 降解.
- 为了评估老化SBR的生物降解由Rhodococcus ruber和Gordonia polyisoprenivorans.
- 确定非生物老化对SBR生物降解性的影响.
主要方法:
- 多学科的方法,包括SBR膜的照片和热老化.
- 使用Rhodococcus ruber和Gordonia polyisoprenivorans化老化的SBR薄膜.
- 降解产品和生物降解程度的分析 (% ThOD).
主要成果:
- 生物老化导致SBR薄膜的交叉连接和表面氧化.
- 降解产生了高不和和氧化率的短链化合物.
- Rhodococcus ruber和Gordonia polyisoprenivorans降解了0.2-1.2%的老化的SBR,但不是原始的SBR.
- 水中可提取化合物的25-75%降低表明降解产品的消耗.
结论:
- 无生物降解显著增强了乙烯的生物降解.
- 陈旧的SBR降解产品作为微生物生长的基质.
- 轮胎胎面的环境气候变化可能会增加其对生物降解的易感性.
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