文献类型：期刊文献

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

作者：Yan, Ruiqi[1];Lin, Sen[1];Ding, Qian[1];Zhang, Lei[1];Yu, Xia[1];Zhao, Wentao[2,3];Sui, Qian[1,3]

机构：[1]East China Univ Sci & Technol, Sch Resources & Environm Engn, State Environm Protect Key Lab Environm Risk Asses, Shanghai 200237, Peoples R China;[2]Tongji Univ, Coll Environm Sci & Engn, State Key Lab Pollut Control & Resource Reuse, Shanghai 200092, Peoples R China;[3]Shanghai Inst Pollut Control & Ecol Secur, Shanghai 200092, Peoples R China

年份：2024

卷号：18

期号：5

外文期刊名：FRONTIERS OF ENVIRONMENTAL SCIENCE & ENGINEERING

收录：;EI(收录号：20240915661638);WOS:【SCI-EXPANDED(收录号:WOS:001174613900001)】；

基金：This research was partly supported by the National Natural Science Foundation of China (Nos. 22376066 and 22076045), the Science and Technology Commission of Shanghai Municipality's zhongYangfan Special Project (China) (No. 23YF1408400), the Postdoctoral Innovation Talents Support Program (China) (No. BX20230123), and the Fundamental Research Funds for the Central Universities (China).

语种：英文

外文关键词：Nanoplastic quantification; Fluorescence intensity; Drinking water; Limit of quantification (LOQ); Matrix effects

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 mu g/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.