对轮胎和道路磨损颗粒及其化学物质的长期生物降解研究
Steffen Weyrauch1, Bettina Seiwert1, Milena Voll1
1Helmholtz-Centre for Environmental Research - UFZ, Department Environmental Analytical Chemistry, Permoserstrasse 15, 04318 Leipzig, Germany.
The Science of the total environment
|March 29, 2025
概括
轮胎和道路磨损颗粒 (TRWP) 在两年内显著减少水和土壤中的化学液. 然而,TRWP仍然可以作为某些轮胎相关化学物质及其副产品的长期环境储存库.
科学领域:
- 环境科学 环境科学
- 环境化学环境化学
- 材料科学 材料科学 材料科学
背景情况:
- 轮胎和道路磨损颗粒 (TRWP) 是源自汽车交通的无处不在的环境污染物.
- 了解TRWP的长期环境命运和退化对于评估其生态影响至关重要.
研究的目的:
- 调查微生物降解对TRWP和冷磨轮胎流面 (CMTT) 在水和土壤环境中的长期影响,持续两年.
- 在模拟环境条件下量化TRWP和CMTT中可提取化学品的减少和转化.
主要方法:
- 暴露TRWP和CMTT在24个月内与微生物存在的水和土壤环境中.
- 使用化学分析分析物理性质和总量化提取物 (TQE) 和特定转化产品的量化分析.
- 动力建模 (第一阶段动力学的两个阶段) 来确定特定化合物的降解半衰期.
主要成果:
- 水中的降解对粒子物理性质的影响最小;尺寸的变化归因于机械应力.
- 观察到TQE的显著减少 (90%在水中,85%在土壤中),主要是在最初的几个月内.
- 降解动力学遵循两个阶段,其半衰期为特定化合物如6-PPD和6-PPDQ,从几天到2000多天不等.
- 只有很小的一小部分 (1-15%) 的丢失的TQE在水或土壤液中仍可检测到,其中索是普遍存在的.
结论:
- 生物降解有效地减少了与水和土壤环境中TRWP相关的极性和中度极性化学物质的大量.
- 尽管大幅减少,但TRWP可以继续作为某些轮胎相关化学品及其转化产品的长期环境储备.
- 该研究强调了一些与TRWP相关的化合物的复杂降解途径和长时间的环境持久性.
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