修订了多环芳和相关碳化合物的描述符,用于使用溶解参数模型预测环境特性
1Department of Chemistry, Wayne State University, Detroit, MI 48202, USA.
Journal of chromatography. A
|October 9, 2023
概括
对多环芳 (PAHs) 的新描述符改善了环境性质预测. 这些从染色体学中获得的溶解参数,为了解PAH行为提供了比传统实验方法更快的替代方案.
科学领域:
- 环境化学环境化学
- 计算化学的计算化学
背景情况:
- 多环芳 (PAH) 是一种环境污染物.
- 准确预测它们的环境特性对于风险评估至关重要.
- 确定这些属性的现有方法可能是耗时且昂贵的.
研究的目的:
- 为韦恩州立大学 (WSU) 的溶解参数模型修订和提供25种PAH的新描述符.
- 建立一种更有效的方法来预测PAHs的关键环境特性.
主要方法:
- 使用Solver方法与实验色谱保留因子和分区常数.
- 开发了基于溶解性质的新描述器,专注于分散 (E) 和双极型 (S) 相互作用.
- 采用双参数模型 (V和B描述符) 进行水溶性预测.
主要成果:
- 在水-空气 (AAD=0.17),八醇-空气 (AAD=0.12) 和水-八醇 (AAD=0.10) 分割常数方面取得了可接受的预测准确度.
- 使用V和B描述符,证明了水溶性 (AAD=0.26) 的公正预测.
- 验证了染色学和分离常数测量的实用性,用于估计环境属性.
结论:
- 修订后的描述符提供了一种可靠和有效的方法来预测PAHs的环境特性.
- 这种方法提供了一种可行的替代方法,可以替代繁忙的实验确定诸如分区常数和可溶性等属性.
- 随着这些描述符的增强,WSU溶解参数模型促进了更快的PAHs环境风险评估.
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