金标法对天然水中纳米塑料的定量是否合适?

IF 2.1 4区 环境科学与生态学 Q2 ENGINEERING, CIVIL
Februriyana Pirade, Kim Lompe, Javier Jimenez-Lamana, Sulalit Bandyopadhyay, Katharina Zürbes, Nesrine Bali, Dušan Materić, Jan Willem Foppen
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引用次数: 0

摘要

摘要在地表水中检测到纳米塑料,但准确定量其颗粒数浓度仍然是一个重大挑战。在这项研究中,我们测试了金标记方法在含水基质的天然有机物质(NOM)中量化纳米塑料的适用性。明胶包覆的金纳米粒子(Au-gel NPs)通过静电相互作用与纳米塑料形成偶联物,产生峰值信号,可通过单粒子电感耦合等离子体质谱(SP-ICP-MS)转化为粒子数浓度。我们使用了不同浓度的水样,分别添加和不添加1 × 107个L−1纳米塑料颗粒。我们的研究结果表明,低NOM样品(<1 mg·C L−1)中的纳米塑料可以成功地定量。然而,在高NOM样品(>15 mg·C L−1)中,只有13-19%添加的纳米塑料被成功定量。进一步消化去除NOM只产生了10%的加标纳米塑料。高NOM样品中的这种差异可能归因于纳米塑料与水样中存在的NOM之间的竞争,以与金凝胶NPs结合。我们的研究强调了金凝胶标记方法在低NOM水样中定量纳米塑料的适用性。然而,进一步的优化,包括预消化步骤,是必要的,以有效地将该方法应用于高NOM水样。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
How suitable is the gold-labelling method for the quantification of nanoplastics in natural water?
Abstract Nanoplastics are detected in surface water, yet accurately quantifying their particle number concentrations remains a significant challenge. In this study, we tested the applicability of a gold-labelling method to quantify nanoplastics in natural organic matter (NOM) containing water matrices. Gelatin-coated gold nanoparticles (Au-gel NPs) form conjugates with nanoplastics via electrostatic interaction which produces peak signals which can be translated into particle number concentration using single-particle inductively coupled plasma–mass spectrometry (SP-ICP-MS). We used water samples with various NOM concentrations, with and without the addition of 1 × 107 particles L−1 nanoplastics. Our results indicate that nanoplastics in low NOM samples (&lt;1 mg·C L−1) could be successfully quantified. However, in high NOM samples (&gt;15 mg·C L−1), only 13–19% of added nanoplastics were successfully quantified. Further digestion to remove NOM yielded only 10% of spiked nanoplastics. This discrepancy in high NOM samples could likely be attributed to the competition between nanoplastics and NOM existing in the water sample to bind with Au-gel NPs. Our study highlights the suitability of the Au-gel labelling method for quantifying nanoplastics in low NOM water samples. Nevertheless, further optimization, including pre-digestion steps, is essential to apply this method for high NOM water samples effectively.
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来源期刊
CiteScore
4.10
自引率
21.10%
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审稿时长
20 weeks
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