复杂的多环芳香化合物混合物在中国大城市的PM2.5:时空变化,毒性和来源分配
Yuan Zeng1, Hui-Min Ma2, Qian-Yu Zhang3
1School of Environment, Guangdong Provincial Key Laboratory of Chemical Pollution and Environmental Safety & MOE Key Laboratory of Theoretical Chemistry of Environment, South China Normal University, Guangzhou 510006, China.
Environment international
|August 22, 2023
概括
微细颗粒物 (PM2.5) 中的多环芳香化合物 (PAC) 有助于空气毒性. 工业来源和高分子量PAH是大城市反应性氧物种生成的关键驱动因素.
科学领域:
- 环境化学环境化学
- 毒理学 毒理学 毒理学
- 空气污染 造成的空气污染
背景情况:
- 多环芳香化合物 (PAC) 是细颗粒物 (PM2.5) 的有毒成分.
- 了解PM2.5毒性与环境空气中的PAC之间的联系至关重要.
- 需要对PM2.5-bound PACs的时空变化和毒理影响进行研究.
研究的目的:
- 研究PM2.5.5中的PACs的时空变化.
- 描述由PM2.5有机提取物诱导的活性氧物种 (ROS) 生成和细胞毒性.
- 在复杂的PAC混合物中使用高级回归模型识别关键毒素.
主要方法:
- 从中国一个大城市的11个地点收集了PM2.5样本.
- 进行细胞测试以测量ROS生成和细胞毒性.
- 利用额外的树回归和回归来识别有毒物质.
- 分析了PAC度,包括多环芳 (PAHs).
主要成果:
- 总PAC度在2.12至71.7 ng/m3之间.
- 来自废物处理设施的PM2.5显示出最高的毒性.
- ROS生成与高分子量PAHs (MW302 PAHs) 有着强烈的相关性.
- 煤炭/生物质燃烧 (30.2%) 和工业来源 (31.0%) 是主要的PAC来源.
- 工业来源与显著的ROS产生有关.
结论:
- 高分子量PAHs (MW302PAHs) 具有强大的ROS产生潜力.
- 工业PAC排放大大导致PM2.5毒性和大城市的ROS产生.
- 调查结果强调需要更严格的工业排放控制,以减轻空气污染对健康的风险.
关键词:
细胞死亡率 细胞死亡率高分子量PAHs (MW302PAHs) 是一种高分子量PAHs.化PAHs (NPAHs) 是一种有氧化化合物.有氧化PAHs (OPAHs) 是一种有氧化PAHs.多环芳 (PAHs) 是一种多环芳.反应性氧物种 (ROS) 是一种反应性氧物种.更多相关视频
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