对来自推断的降解途径的二氧化及其转化副产品的毒性评估
Qing Li1, Yuhan Cui1, Zhonghe Wang1
1College of Environmental Science and Engineering, North China Electric Power University, Beijing 102206, China.
The Science of the total environment
|May 25, 2024
概括
这项研究评估了二氧化碳降解风险,确定了具有增加毒性和内分泌干扰潜力的转化产品. 这些发现为减轻二氧化副产品对环境健康的危害提供了理论基础.
科学领域:
- 环境化学环境化学
- 毒理学 毒理学 毒理学
- 计算化学的计算化学
背景情况:
- 持久性有机污染物 (POP),特别是二氧化物,对公众健康和环境构成重大风险.
- 评估二氧化碳降解途径的毒性对于风险评估和缓解策略至关重要.
- 作为模型化合物,选择了OCDD,HpCDD和HpCDF等非常丰富和可生物降解的二氧化.
研究的目的:
- 在各种降解条件下 (生物代谢,微生物有氧/无氧,光降解) 推导出二氧化物转化途径.
- 评估二氧化碳前体及其降解产物的致癌和内分泌干扰潜力.
- 综合评估与不同的二氧化碳降解途径相关的环境健康风险.
主要方法:
- 密度函数理论 (DFT) 用于计算吉布斯自由能量以预测路径可行性.
- TOPKAT模型用于评估致癌潜力.
- 分子对接和主观分配用于评估内分泌干扰效应.
- 积极和消极指标标准化风险评估方法.
- 3D-QSAR建模用于研究验证.
主要成果:
- 演变路径被推断出来,DFT预测了它们的可能性.
- 一些降解产品显著增加了毒性,与它们的化学结构有关.
- 具有更高含量和与甲状腺激素结构相似的二氧化物转化产品表现出更大的内分泌干扰潜力.
- 在不同的降解途径中,环境健康风险各不相同.
结论:
- 该研究提供了一个理论框架,用于理解和减轻来自二氧化碳降解副产品的毒性风险.
- 识别的结构特征与增加的毒性和内分泌干扰相关.
- 这项研究为二氧化毒性评估和环境风险管理提供了至关重要的理论支持.
相关概念视频
01:36Types of Toxins
1.7K
Humans continually engage with an environment rich in potentially harmful chemicals. These are introduced to our bodies through inhalation, ingestion, or skin contact. These chemicals exist in various forms, such as air and environmental pollutants, agricultural chemicals, organic solvents, and heavy metals.
Air pollutants, primarily gases, pose significant threats to respiratory health, leading to conditions like hypoxia, lung cancer, and in extreme cases, death.
Environmental pollutants like...
Air pollutants, primarily gases, pose significant threats to respiratory health, leading to conditions like hypoxia, lung cancer, and in extreme cases, death.
Environmental pollutants like...
1.7K
01:25Mutagenicity and Carcinogenicity
1.2K
Mutagenicity and carcinogenicity refer to the ability of drugs to cause genetic defects and induce cancer, respectively. The International Agency for Research on Cancer (IARC) classifies agents into four groups based on their carcinogenic potential. Group 1 agents are known human carcinogens; group 2A agents are probably carcinogenic to humans; group 3 agents lack data to support their role in carcinogenesis; and group 4 includes agents for which data support that they are not likely to be...
1.2K