溶解性有机质对二氧化钛纳米颗粒环境行为及生物学效应的影响

Influence of Dissolved Organic Matter on Environmental Behavior and Biological Effects of Titanium Dioxide Nanoparticles

溶解性有机质(DOM)与二氧化钛纳米颗粒(nTiO_(2))的相互作用及其效应是当前研究的热点之一。随着nTiO_(2)在各个领域的广泛应用,了解其在环境中与DOM之间的复杂关系对于环境保护和人类健康至关重要。一旦nTiO_(2)进入环境中,它与水体中存在的DOM发生多层次的物理和化学相互作用。这些相互作用包括但不限于配位体交换、疏水性作用、静电作用力以及分子间作用力等。这一过程导致nTiO_(2)的表面电荷、疏水性和表面官能团等物理化学性质发生显著变化。这种变化不仅影响了nTiO_(2)在水体中的胶体稳定性,还可能改变其对环境中污染物的迁移和转化能力。此外,DOM的存在可能显著影响nTiO_(2)的富集、产生自由基以及在生物体系中引起的生物效应。为深入了解DOM与nTiO_(2)相互作用的机制和效应,近年来的研究已取得一系列重要成果。通过总结这些研究成果,可以更好地理解DOM对nTiO_(2)在环境中行为和效应的关键影响因素,为未来的环境保护和纳米材料应用提供有益的指导。

The interaction and effects of dissolved organic matter(DOM)with titanium dioxide nanoparticles(nTiO_(2))are a current focus of research.The widespread use of nTiO_(2) in various fields;necessitates an understanding of its complex relationship with DOM in the environment,which is crucial for both environmental protection and human health.Once in the environment,nTiO_(2) engages in multi-level physical and chemical interactions with DOM in aquatic systems.These interactions include coordination exchange,hydrophobic interactions,electrostatic forces,and intermolecular forces,leading to significant changes in nTiO_(2)’s physicochemical properties,such as surface charge,hydrophobicity,and surface functional groups.These changes affect the colloidal stability of nTiO_(2) in water and may alter its ability to migrate and transform environmental pollutants.Moreover,DOM’s presence significantly impact the enrichment of nTiO_(2),free radical generation,and the biological effects it induces in biological systems.Recent research has provided important findings that deepen our understanding of the mechanisms and effects of DOM-nTiO_(2) interactions.Summarizing these outcomes enhances our comprehension of the key factors influencing DOM’s impact on nTiO_(2) behavior in the environment,as well as its biological effects.This understanding offers valuable guidance for future environmental protection and the application of nanomaterials.