Toward a rapid and convenient nanoplastic quantification method in laboratory-scale study based on fluorescence intensity

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外文摘要：The thorough investigation of nanoplastics(NPs)in aqueous environments requires efficient and expeditious quantitative analytical methods that are sensitive to environmentally relevant NP concentrations and convenient to employ.Optical analysis-based quantitative methods have been acknowledged as effective and rapid approaches for quantifying NP concentrations in laboratory-scale studies.Herein,we compared three commonly used optical response indicators,namely fluorescence intensity(FI),ultraviolet absorbance,and turbidity,to assess their performance in quantifying NPs.Furthermore,orthogonal experiments were conducted to evaluate the influence of various water quality parameters on the preferred indicator-based quantification method.The results revealed that FI exhibits the highest correlation coefficient(＞0.99)with NP concentration.Notably,the limit of quantification(LOQ)for various types of NPs is exceptionally low,ranging from 0.0089 to 0.0584 mg/L in ultrapure water,well below environmentally relevant concentrations.Despite variations in water quality parameters such as pH,salinity,suspended solids(SS),and humic acid,a robust relationship between detectable FI and NP concentration was identified.However,an increased matrix,especially SS in water samples,results in an enhanced LOQ for NPs.Nevertheless,the quantitative method remains applicable in real water bodies,especially in drinking water,with NP LOQ as low as 0.0157-0.0711 mg/L.This exceeds the previously reported detectable concentration for 100 nm NPs at 40 μg/mL using surface-enhanced Raman spectroscopy.This study confirms the potential of FI as a reliable indicator for the rapid quantification of NPs in aqueous environments,offering substantial advantages in terms of both convenience and cost-effectiveness.

外文关键词：

Nanoplastic quantificationFluorescence intensityDrinking waterLimit of quantification(LOQ)Matrix effects

作者：

Ruiqi Yan、Sen Lin、Qian Ding、Lei Zhang、Xia Yu、Wentao Zhao、Qian Sui

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作者单位：

State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process,School of Resources and Environmental Engineering,East China University of Science and Technology,Shanghai 200237,China

State Key Laboratory of Pollution Control and Resource Reuse,College of Environmental Science and Engineering,Tongji University,Shanghai 200092,China

Shanghai Institute of Pollution Control and Ecological Security,Shanghai 200092,China

基金：

National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaScience and Technology Commission of Shanghai Municipality's zhongYangfan Special Project(China)Postdoctoral Innovation Talents Support Program(China)Fundamental Research Funds for the Central Universities(China)

项目编号：

223760662207604523YF1408400BX20230123

出版年：

2024

DOI：

10.1007/s11783-024-1821-6

环境科学与工程前沿

高等教育出版社

环境科学与工程前沿

影响因子：0.545

ISSN：2095-2201

年,卷(期)：2024.18(5)