[在水溶液中的紫外线老化聚烯微塑料上的吸附特性]
Hai-Tao Yu1, Guo-Xin Li1, Heng Zhang1
1Key Laboratory of Water Resources Utilization and Protection of Xiamen, College of Environmental Science and Technology, Xiamen University of Technology, Xiamen 361024, China.
Huan jing ke xue= Huanjing kexue
|February 9, 2026
概括
紫外线衰老的聚烯微塑料 (PP MP) 通过化学吸收增强了 (As(V)) 的吸附. 这项研究表明,紫外线老化增加了表面积和功能组,提高了As(V) 清除效率,并为生态风险评估提供了信息.
科学领域:
- 环境科学 环境科学
- 材料科学 材料科学 材料科学
- 分析化学 分析化学
背景情况:
- 微塑料 (MP) 是普遍存在的水生污染物,具有显著的吸附能力.
- 紫外线老化对MP吸附特定污染物如 (As) 的影响仍然未得到充分研究.
- 了解老年议员的污染物吸附对于环境风险评估至关重要.
研究的目的:
- 通过原始和紫外线老化聚烯微塑料 (PP MPs) 调查 (As(V)) 的吸附动力学和异温.
- 评估环境因素 (pH,溶解有机物,NO3-) 对老年PPMP的吸作用.
- 阐明吸附机制并量化紫外线老化导致的吸附能力的变化.
主要方法:
- 静态吸附实验使用原始和紫外线老化PPMP进行.
- 吸附动力学和同热吸附数据使用伪二阶,弗洛伊德利希和朗穆尔模型进行了分析.
- 系统地研究了pH,溶解有机物和NO3对As (V) 吸附的影响.
主要成果:
- 紫外线老化在PP MP上产生了更粗的表面,具有更多的孔隙和含氧的功能组,从而增加了结晶性.
- 在12小时内达到吸附平衡,紫外线衰老的MP显示出更强的附加伪二次动力模型 (化学吸附).
- 弗洛伊德利希模型最好地描述了异热吸附,表明表面复杂化和范德瓦尔斯力;老年MP的最大吸附能力 (Qm) 增加了11.8%.
结论:
- 紫外线老化显著提高了PP MPs对As{V}的吸附能力,主要是通过化学吸附.
- 环境因素,如NO3-和溶解有机物质影响老年MP的As (V) 吸附,具有复杂的度依赖的效应.
- 这项研究提供了评估生物地化学循环和与老化微塑料污染相关的生态风险的关键数据.
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