<br>荧光 EEM 结合 FRI 和 PARAFAC 揭示口罩中溶解有机物的浸出行为,Water Research

当前位置： X-MOL 学术 › Water Res. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

荧光 EEM 结合 FRI 和 PARAFAC 揭示口罩中溶解有机物的浸出行为
Water Research ( IF 11.4 ) Pub Date : 2024-03-05 , DOI: 10.1016/j.watres.2024.121399
Zhong Jin ₁ , Weibo Zhang ₂ , Xihuan Wang ₂ , Ang Liu ₂ , Zhongyu Li ₃ , Yingchen Bai ₁ , Fengchang Wu ₂

Affiliation

尽管进行了大量研究调查了微塑料的发生和归宿，但尚未致力于探索从 COVID-19 大流行期间主要由塑料和大量使用的添加剂制成的口罩中浸出的溶解有机物（DOM）的特性。通过使用 FTIR、紫外-可见光、荧光 EEM 与 FRI 和 PARAFAC 耦合以及浸出实验的动力学模型，我们探索了口罩衍生的 DOM （FM-DOM）从常用口罩（包括 N95、KN95、医用外科口罩等）中的浸出行为。FM-DOM 的浓度在 0-48 小时早期迅速增加，并在约 48 小时达到平衡，根据溶解有机碳和荧光强度测量。在 1 至 360 h 的浸出实验中，通过荧光 EEM-FRI 分析的四种类型的 FM-DOM 中，蛋白质样材料在荧光响应百分比（Pi，n）的 80.32 % 至 89.40% 范围内占主导地位。通过荧光 EEM-PARAFAC 模型鉴定出 4 种荧光成分，包括色氨酸样成分、酪氨酸样成分、微生物蛋白样成分和黄腐样成分。基于伪动力学模型推导的方程，多阶动力学模型（Radj2 0.975–0.999）比零阶和一阶动力学模型（Radj2 0.936–0.982）更适合 FM-DOM 的所有 PARAFAC 分量。4 个 FM-DOM 样品的浸出速率常数（kn）范围为 0.058 至 30.938，半衰期（T1/2）范围为 2.73 至 24.87 h，遵循 0 至 360 h 期间四种口罩的黄腐样成分（C4） > 微生物蛋白样成分（C3） > 色氨酸样成分（C1） > 酪氨酸样成分（C2）的溶解度顺序。这些新发现将有助于理解口罩对水生生态系统中被低估的环境影响。

"点击查看英文标题和摘要"

Leaching behaviors of dissolved organic matter from face masks revealed by fluorescence EEM combined with FRI and PARAFAC

Despite numerous studies investigating the occurrence and fate of microplastics, no effort has been devoted toward exploring the characteristics of dissolved organic matter (DOM) leached from face masks mainly made of plastics and additives used in large quantities during the COVID-19 pandemic. By using FTIR, UV–vis, fluorescence EEM coupling with FRI and PARAFAC, and kinetic models of leaching experiments, we explored the leaching behaviors of face mask-derived DOM (FM-DOM) from commonly used face masks including N95, KN95, medical surgical masks, etc. The concentration of FM-DOM increased quickly at early 0–48 h and reached equilibrium at about 48 h measured in terms of dissolved organic carbon and fluorescence intensity. The protein-like materials ranged from 80.32 % to 89.40 % of percentage fluorescence response (Pi,n) were dominant in four types of FM-DOM analyzed by fluorescence EEM-FRI during the leaching experiments from 1 to 360 h. Four fluorescent components were identified, which included tryptophan-like components, tyrosine-like components, microbial protein-like components, and fulvic-like components with fluorescence EEM-PARAFAC models. The multi-order kinetic model (Radj2 0.975–0.999) fitted better than the zero-order and first-order kinetic model (Radj2 0.936–0.982) for all PARAFAC components of FM-DOM based on equations derived by pseudo kinetic models. The leaching rate constants (kn) ranged from 0.058 to 30.938 and the half-life times (T1/2) ranged from 2.73 to 24.87 h for four FM-DOM samples, following the solubility order of fulvic-like components (C4) > microbial protein-like components (C3) > tryptophan-like components (C1) > tyrosine-like components (C2) for FM-DOM from four types of face masks during the leaching experiment from 0 to 360 h. These novel findings will contribute to the understanding of the underappreciated environment impact of face masks in aquatic ecosystems.

更新日期：2024-03-05

点击分享查看原文

点击收藏

阅读更多本刊新发论文本刊介绍/投稿指南