一个简单的方法来识别和量化微塑料,使用差分扫描热量计
Jooyoung Lee1, Soyeong Yoon1, Taesoon Jang1
1Department of Environmental Engineering, Kangwon National University, Chuncheon 24341, Republic of Korea.
The Science of the total environment
|November 13, 2024
概括
差分扫描热量计 (DSC) 提供了一种成本效益高且简单的方法,用于在水中环境中识别和量化微塑料 (MP). 这种热分析技术为昂贵且耗时的光谱方法提供了可行的替代方案.
科学领域:
- 环境科学 环境科学
- 分析化学 分析化学
- 材料科学 材料科学 材料科学
背景情况:
- 水生生态系统中的微塑料 (MP) 污染是全球日益关注的问题.
- 目前的检测方法,如μ-富里埃变换红外光谱法 (μ-FTIR),是昂贵的,耗时的,缺乏量化质量度数据.
- 需要可访问的分析技术来识别和量化水中的MP.
研究的目的:
- 开发和验证使用差分扫描热度计 (DSC) 进行微塑料识别和定量化的成本效益和简单方法.
- 评估DSC的可行性,作为水生样本中微塑料分析的μ-FTIR的替代方案.
主要方法:
- 差分扫描热量计 (DSC) 用于分析六种半晶体和四种无形聚合物.
- 在20°C/分钟的加热-冷却-加热方法被用来确定点和玻璃过渡温度.
- 斯式和不对称的双西格形模型用于峰值解卷.
- 一个案例研究分析了废水处理厂的废水,将DSC结果与μ-FTIR数据进行比较.
主要成果:
- DSC成功地根据其特有的热过渡确定和量化了微塑料.
- 对废水废水的分析通过DSC.产生了0.70-0.79μg/L的MP度.
- 这意味着每天将105-117.75g的MP排放到Uiam湖中.
- 与μ-FTIR (0.54-2.03μg/L) 相比,DSC结果显示了一些变化,可能是由于转换方法偏差.
结论:
- 差分扫描热量计 (DSC) 是一种可行的,经济的,简单的分析方法,用于识别和量化水中环境中的微塑料.
- DSC为常规微塑料监测提供了一个有前途的替代方案,补充了现有的光谱技术.
- 该研究强调了热分析在解决微塑料污染评估挑战方面的潜力.
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