便携式热解-微等离子碳光学发射光谱仪装置用于检测水中的微塑料和纳米塑料
Luji Yang1, Yuhui Cai1, Hao Liu1
1College of Materials and Chemistry & Chemical Engineering, Chengdu University of Technology, Chengdu, Sichuan 610059, China.
Analytical chemistry
|February 24, 2025
概括
一种新方法使用便携式 pyrolyzer 和光学发射光谱仪来量化水中的微塑料和纳米塑料 (MNPs). 这种方法提供了一种灵敏而准确的方法,可以在现场监测MNP污染,减少对昂贵设备的需求.
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:
- 塑料分解成微塑料和纳米塑料 (MNP),造成严重的环境和健康风险.
- 由于当前仪器仪表的局限性,在水中的MNP的准确现场量化具有挑战性.
- 开发具有成本效益和可移植的MNP检测方法对于环境监测至关重要.
研究的目的:
- 开发一种简单的现场方法,用于在水样中监测总微型和纳米塑料 (MNP) 污染.
- 使用便携式 pyrolyzer (Pyr) 与微型点放电光学发射光谱仪 (μPD-OES) 结合用于 MNP 分析.
- 建立总有机碳 (TOC) 作为MNP量化可靠指数.
主要方法:
- 一种新的方法,涉及硫化和芬顿消化,以隔离颗粒黑碳 (PBC).
- 通过过氧硫酸氧化和芬顿消化收集MNP和PBC,根据差异计算MNP TOC.
- 收集的MNP在便携式热解剂中的分解,用μPD-OES分析碳排放线的热解产品.
主要成果:
- 拟议的方法实现了MNP的0.438.56μg C L-1的低检测极限.
- 证明了高精度,相对标准偏差 (RSD) 优于4.0% (n=11).
- 在各种水表 (水龙头,河流,海水,污水,工业废水) 中成功应用,结果与商业TOC分析仪相美.
结论:
- 开发的方法为现场MNP监控提供了灵敏,准确和便携式的解决方案.
- 它大大减少了对昂贵和庞大的实验室仪器的依赖.
- 该方法显示了在环境MNP污染评估中广泛应用的强大潜力,最大限度地降低了能源消耗.
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