在与o-xylen同时暴露时,增加了对Eisenia fetida的氨酸毒性
Guofeng Li1,2, Zhongran Wu1,2, Haifeng Chi1,2
1State Key Laboratory for Ecological Security of Regions and Cities, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China. ccai@iue.ac.cn.
Environmental science. Processes & impacts
|May 28, 2025
概括
在土壤中,多环芳 (PAH) 和,,乙, (BTEX) 化合物的联合暴露加剧了对的毒性. 了解这些协同效应对于评估污染环境中的生态风险至关重要.
科学领域:
- 环境科学 环境科学
- 生态毒理学 生态毒理学
- 土壤科学 土壤科学
背景情况:
- 多环芳 (PAH) 和,,乙烯和 (BTEX) 是常见的土壤污染物,具有已知的毒性.
- 这些同时出现的污染物的生态风险和影响并未得到充分理解.
- 像Eisenia fetida这样的地是重要的土壤生物,也是环境污染的敏感指标.
研究的目的:
- 评估 (PHE) 和 (OX) 对Eisenia fetida的单独和联合毒性影响.
- 研究PHE和OX暴露的生物积累和生态毒理学影响,单独和组合.
- 阐明土壤生态系统中PHE和OX之间的有毒机制和协同相互作用.
主要方法:
- 暴露Eisenia fetida在人工土壤中不同度的PHE和OX.
- 对死亡率 (LC50) 和生殖效应 (EC50) 的评估.
- 对生物标志物反应的分析,包括抗氧化酶活性和马隆迪化物水平.
- 应用数学模型来确认协同效应和分析污染物相互作用.
主要成果:
- 对于PHE,单次暴露LC50为71.6mgkg-1;对于OX,单次暴露LC50为121mgkg-1.
- 单次暴露EC50用于PHE的生殖是4.73毫克公斤-1和OX是5.20毫克公斤-1.1.
- 与PHE和OX同时暴露显著加剧了毒性,与单独PHE相比,降低了15%以上的生育能力,表明了协同效应.
- 生物标志物反应表明PHE和OX单独具有不同的毒性机制,但PHE在联合治疗中似乎占主导地位.
- *o*-Xylene 作为催化剂,增强了 PHE 积累和虫中的毒性.
结论:
- PHE和OX的联合暴露对*Eisenia fetida*具有协同毒性,OX可能会增强PHE的作用.
- 对于PHE和OX存在不同的毒理途径,但PHE在联合毒性中起着主要作用.
- 准确评估共污染土壤的生态风险需要考虑污染物相互作用和协同效应.
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