[1]杨雪.河道底泥溶解性有机物与工程纳米材料的相互作用[J].中国给水排水,2025,41(21):31-37.
　YANGXue.Interaction between Engineered Nanomaterials and Dissolved Organic Matters in River Sediments[J].China Water & Wastewater,2025,41(21):31-37.
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河道底泥溶解性有机物与工程纳米材料的相互作用

中国给水排水[ISSN:1000-4062/CN:12-1073/TU] 卷: 第41卷 期数: 2025年第21期 页码: 31-37 栏目: 出版日期: 2025-11-01
Title:
Interaction between Engineered Nanomaterials and Dissolved Organic Matters in River Sediments
作者:
杨雪
（上海市政工程设计研究总院<集团>有限公司，上海 200092）
Author(s):
YANG　Xue
（Shanghai Municipal Engineering Design Institute Co. Ltd.， Shanghai 200092， China）
关键词:
河道底泥;  纳米二氧化钛;  溶解性有机物;  环境行为;  光谱学
Keywords:
river sediment;  nano-titanium dioxide;  dissolved organic matter;  environmental behavior;  spectroscopy
摘要:
工程纳米材料（ENMs）不断在河道或湖泊底泥中积累，通过与底泥中溶解性有机物（DOM）结合，ENMs生物利用度等特性会被改变，进而对环境和人类健康造成影响。为此，自上海市青浦区某河道底泥中提取DOM，以纳米二氧化钛（TiO2）为ENMs模式物，采用三维荧光光谱等技术解析二者的相互作用机制。结果表明，蛋白质、腐殖质和脂肪酸三种主要DOM组分均可与ENMs结合，且分子结构会被ENMs改变；相比蛋白质和脂肪酸，腐殖质与ENMs具有更好的结合能力，且低温有利于结合物的稳定；另外，蛋白质、腐殖质和脂肪酸与ENMs结合后均吸附在纳米颗粒表面。
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.

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更新日期/Last Update: 2025-11-01