YANGXue.Interaction between Engineered Nanomaterials and Dissolved Organic Matters in River Sediments[J].China Water & Wastewater,2025,41(21):31-37.
Interaction between Engineered Nanomaterials and Dissolved Organic Matters in River Sediments
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第41卷
Number:
第21期
Page:
31-37
Column:
Date of publication:
2025-11-01
- Keywords:
- river sediment; nano-titanium dioxide; dissolved organic matter; environmental behavior; spectroscopy
- Abstract:
- Engineered nanomaterials (ENMs) continuously accumulate in the sediments of rivers and lakes. The properties of ENMs such as bioavailability can be altered through interactions with dissolved organic matters (DOM) present in the sediment, potentially impacting environmental systems and human health. In this study, DOM was extracted from sediment samples collected from a river channel in Qingpu District, Shanghai. Nano-titanium dioxide (nano-TiO2) was selected as the model ENMs, and the interaction mechanism between DOM and nano-TiO2 was investigated using three-dimensional fluorescence spectroscopy in conjunction with other analytical techniques. The three primary DOM components, namely proteins, humic substances, and fatty acids, could all interact with ENMs, potentially leading to alterations in their molecular structures. Compared to proteins and fatty acids, humic substances exhibited a stronger binding affinity toward ENMs, and lower temperatures enhanced the stability of the resulting complexes. Furthermore, proteins, humic substances, and fatty acids were adsorbed onto the surface of nanoparticles following their interaction with ENMs.
Last Update:
2025-11-01