从废水中提取微塑料的创新性铁声尼方法
Juviya Mathew1, Gaurav Bhardwaj1, Rama Pulicharla1
1Department of Civil Engineering, Lassonde School of Engineering, York University, Toronto, Canada.
The Science of the total environment
|August 18, 2024
概括
一种新的铁-超声波 (Fe-UlS) 方法有效地从废水中去除悬浮固体,大大改善了微塑料 (MP) 的提取. 这种优化的预处理确保了废水样本中精确的MP分析.
科学领域:
- 环境化学环境化学
- 分析化学 分析化学
- 水处理技术水处理技术
背景情况:
- 在废水 (WW) 中精确的微塑料 (MP) 分析受到悬浮固体 (SS) 的阻碍,这些固体干扰过和检测.
- 有效的预处理方法对于复杂的WW矩阵中可靠的MP量化至关重要.
研究的目的:
- 开发和优化一种新的预处理方法,铁-超声波 (Fe-UlS),以有效地从WW中提取MP.
- 为了减少SS干扰,提高废水中的MP分析的准确性和可靠性.
主要方法:
- 使用混合式预处理,结合芬顿反应和超声波 (Fe-UlS) 来消化和去除SS.
- 使用Box-Behnken设计的响应表面方法 (RSM) 来优化Fe-UlS参数 (超声波振幅,时间,H2O2剂量).
- 优化Fe-UlS方法在真实WW中使用尖端MP (PE,PP,PET) 进行了验证,采用LC-MS和LD-IR等技术.
主要成果:
- 优化Fe-UlS实现了0.984的可取性,最佳条件包括1:1的芬顿比率,31%的超声波振幅和30分钟的处理时间.
- 该方法在45°C的30分钟内有效地去除了83%的总悬浮固体 (TSS),而没有显著改变MP特性.
- LC-MS证实了工艺稳定性,没有显示MP漏,LD-IR检测到3434个MP (9-500μm) 在100毫升初级流量中.
结论:
- 开发的Fe-UlS混合预处理方法显著提高了废水中的MP提取效率.
- 这种方法简化了样本处理,减少了试剂的使用,并提供了准确,可靠的数据,用于MP监测在第二次世界大战.
- Fe-UlS为环境样本中微塑料分析的关键挑战提供了一种经过验证,高效的解决方案.
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