Issue 6, 2024

Highly selective capture and efficient concentration of trace titanium dioxide nanoparticles in environmental waters by phosphorylated ferroferric oxide

Abstract

Selectively and efficiently capturing trace titanium dioxide nanoparticles (TiO2NPs) in environmental waters is a prerequisite for their determination to understand their occurrence, behavior and effects in the environment. Herein, we report the determination of TiO2NPs by using magnetic microextraction with phosphorylated Fe3O4 as a selective adsorbent, followed by inductively coupled plasma mass spectrometry (ICP-MS) detection. The phosphorylated Fe3O4 was prepared by modifying phosphoric acid groups on the surface of synthesized Fe3O4, added into the water samples to selectively adsorb and agglomerate with TiO2NPs, and collected using a permanent magnet. Under the optimized extraction parameters, the factors including sizes and concentrations of TiO2NPs, volumes of water samples, and dissolved organic matter (0–30 mg C L−1) showed little effects on the extraction process. The feasibility of the method was further validated by the analysis of natural water samples, with spiked recoveries of 81.9–99.1% and an extremely low detection limit of 0.4 ng L−1. This method is capable of accurately detecting and quantifying the concentration of trace TiO2NPs in aquatic systems, which contributes to monitoring the fate of TiO2NPs in the environment and assessing their hazards.

Graphical abstract: Highly selective capture and efficient concentration of trace titanium dioxide nanoparticles in environmental waters by phosphorylated ferroferric oxide

Supplementary files

Article information

Article type
Paper
Submitted
05 févr. 2024
Accepted
15 avr. 2024
First published
10 mai 2024

Environ. Sci.: Nano, 2024,11, 2541-2549

Highly selective capture and efficient concentration of trace titanium dioxide nanoparticles in environmental waters by phosphorylated ferroferric oxide

R. Zheng, S. Yu, R. Yang, P. Li, Q. Li, L. Li, Y. Chen, Y. Cai and J. Liu, Environ. Sci.: Nano, 2024, 11, 2541 DOI: 10.1039/D4EN00095A

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