异环多芳的环境持久性评估 - 使用适应和非适应的微生物群体的最终和初级生物降解性
Göksu Çelik1, Stefan Stolte1, Susann Müller2
1Institute of Water Chemistry, Dresden University of Technology, 01069 Dresden, Germany.
Journal of hazardous materials
|September 4, 2023
概括
这项研究使细菌适应一年的时间来降解异环多环芳 (异环PAH). 虽然一些化合物被降解了,但其他化合物表现出持久性,突出了环境问题.
科学领域:
- 环境化学环境化学
- 微生物学 微生物学
- 环境科学环境科学
背景情况:
- 异环多环芳 (异环PAH) 是一种持久性环境污染物.
- 由于它们的广泛存在,它们对环境和人类健康的影响需要评估.
- 了解它们的生物降解性对于危害评估至关重要.
研究的目的:
- 为了研究十种异环PAH的生物降解性.
- 开发一种能够降解异环PAHs的微生物群体.
- 将实验结果与in silico模型预测进行比较.
主要方法:
- 从废水处理厂的废水中适应细菌注射剂,使其在一年内适应异环PAH.
- 在整个适应过程中进行的初级和最终生物降解测试.
- 有毒性测试和与in silico生物降解和吸附模型的比较.
主要成果:
- 在10种异环PAH中,有9种被发现不易生物降解.
- 一年后,适应的微生物群体矿化了碳醇,但对[c]碳醇的敏感性增加.
- 观察到四个异环的初级生物降解;五个化合物没有降解.
结论:
- 适应的微生物群体在降解特定的异环PAH方面取得了部分成功.
- 在模型中,在预测生物降解时间和吸收方面取得了部分成功.
- 该研究提供了关于异环PAHs在水生环境中的持久性的见解,有助于危险评估.
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