使用估计程序对多环芳的评估
Oluwabunmi P Femi-Oloye1,2, Ryen T Sutton3, Heidi D Gordon3
1Toxicology Center, University of Saskatchewan, Saskatoon, SK S7N 5B3, Canada.
Toxics
|August 28, 2024
概括
多环芳 (PAHs) 呈现出不同的环境行为,低分子量 (LMW) PAHs更容易溶解,更少有毒. 预计更重的PAHs具有变异性,影响它们的环境持久性和影响.
科学领域:
- 环境化学环境化学
- 毒理学 毒理学 毒理学
- 计算化学计算化学
背景情况:
- 多环芳 (PAH) 是具有多样性行为的环境污染物.
- 了解PAH的可变性和持久性对于环境风险评估至关重要.
- 在中方法提供了一种方法来预测PAH的特性和毒性.
研究的目的:
- 审查多环芳 (PAHs) 的环境行为,区分不稳定和持久的形式.
- 使用计算工具估计29种选定的PAH的毒性和物理化学性质.
- 调查分子量与PAH环境特性和毒性之间的关系.
主要方法:
- 使用了美国环境保护局 (EPA) 的程序,如估计程序接口 (E.P.I.) 和毒性估计软件工具 (TEST v5.1.2).
- 使用在线软件,包括SwissADME和SwissDock用于in-silico预测.
- 估计的关键终点:LC50对于胖头小鱼和大夫尼亚大鱼,IGC50对于Tetrahymena pyriformis,生物度因子,发育毒性和致变性.
主要成果:
- 低分子量 (LMW) 的PAH显示出更高的水溶性,更高的LC50值和更小的LogKow值.
- 较高分子量 (HMW) 的PAH表现出相反的趋势,其环境持久性潜力增加.
- 测试预测,PAH分子重量超过168.2g/mol的PAH通常是致变的,只有少数例外.
结论:
- 分子重量和碳链长度显著影响PAH特性和环境行为.
- 由于具有较高的可溶性,LMWPAH具有更大的环境分布潜力.
- 尽管在环境中存在较高的PAH,但预计LMWPAH的毒性低于HMWPAH.
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