评估轮胎面颗粒的生物降解性和影响因素
Ann Flemming Nielsen1, Fabio Polesel1,2, Tiia Ahonen1,3
1Department of Environmental and Resource Engineering (DTU Sustain), Technical University of Denmark, Lyngby, Denmark.
Environmental toxicology and chemistry
|September 27, 2023
概括
轮胎磨损颗粒 (TWPs) 显示出有限的生物降解性,但紫外线气候增加了它. 天然和芳香提取物是轮胎胎面的关键生物降解成分,影响环境持久性.
科学领域:
- 环境科学 环境科学
- 聚合物科学 聚合物科学
- 环境化学环境化学
背景情况:
- 轮胎磨损颗粒 (TWPs) 是环境污染的重要来源,有助于微塑料,化学和颗粒物污染.
- 人们对TWPs的环境命运和生物降解性不太了解,这给生态风险评估带来了挑战.
研究的目的:
- 调查原始和经过紫外线气候变化的轮胎面颗粒 (TP) 的生物降解性.
- 为了确定单个轮胎成分对TP生物降解性的贡献.
- 了解气候变化对TWP环境持久性的影响.
主要方法:
- 使用有氧水性介质和活性污泥进行封闭瓶试验,以评估28天内的生物降解.
- 测量呼吸量以量化生物氧气消耗.
- 扫描电子显微镜 (SEM) 用于分析由于生物降解的表面侵蚀.
主要成果:
- 纯净的TP表现出4.5%的生物降解性,而紫外线染的TP显示出更高的比率 (6.7%8.0%).
- 天然 (NR) 和经过处理的蒸芳香提取物 (TDAE) 是TP生物降解的主要原因.
- 当合成TP时,单个成分的生物降解率降低了2-5倍,对异烯 (IR) 和丁 (BR) 观察到微不足道的生物降解.
结论:
- TP的生物降解性受紫外线气候和成分成分的影响,NR和TDAE是主要的驱动因素.
- 酸盐在环境中持续存在,气候变化可能会增加它们的生物降解性,但也会改变它们的成分.
- 了解TP生物降解对于评估其长期环境影响和制定减缓策略至关重要.
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