Key Laboratory of Eco-environments in Three Gorges Reservoir Region, Ministry of Education, Faculty of Urban Construction and Environmental Engineering, Chongqing University, Chongqing, 400044, China.
State Key Laboratory of Urban Water Resource and Environment, School of Environmental Engineering, Harbin Institute of Technology, Harbin, China.
Environ Sci Pollut Res Int. 2018 Nov;25(33):33056-33081. doi: 10.1007/s11356-018-3225-2. Epub 2018 Sep 28.
The growing development of nanotechnology has promoted the wide application of engineered nanomaterials, raising immense concern over the toxicological impacts of nanoparticles on the ecological environment during their transport processes. Nanoparticles in aquatic systems may undergo deposition onto environmental surfaces, which affects the corresponding interactions of engineered nanoparticles (ENPs) with other contaminants and their environmental fate to a certain extent. In this review, the most common ENPs, i.e., carbonaceous, metallic, and nonmetallic nanoparticles, and their potential ecotoxicological impacts on the environment are summarized. Colloidal interactions, including Derjaguin-Landau-Verwey-Overbeek (DLVO) and non-DLVO forces, involved in governing the depositional behavior of these nanoparticles in aquatic systems are outlined in this work. Moreover, laboratory approaches for examining the deposition of ENPs on collector surfaces, such as the packed-bed column and quartz crystal microbalance (QCM) method, and the limitations of their applications are outlined. In addition, the deposition kinetics of nanoparticles on different types of surfaces are critically discussed as well, with emphasis on other influencing factors, including particle-specific properties, particle aggregation, ionic strength, pH, and natural organic matter. Finally, the future outlook and challenges of estimating the environmental transport of ENPs are presented. This review will be helpful for better understanding the effects and transport fate of ENPs in aquatic systems. Graphical abstract ᅟ.
纳米技术的不断发展促进了工程纳米材料的广泛应用，同时也引发了人们对纳米颗粒在运输过程中对生态环境产生毒性影响的极大关注。水系统中的纳米颗粒可能会沉积到环境表面，这在一定程度上影响了工程纳米颗粒（ENP）与其他污染物的相应相互作用及其环境归宿。在本综述中，总结了最常见的 ENP，即碳质、金属和非金属纳米颗粒，及其对环境的潜在生态毒理学影响。本文概述了胶体相互作用，包括控制这些纳米颗粒在水系统中沉积行为的德加古因-朗道-范韦斯伯格（DLVO）和非-DLVO 力。此外，还概述了用于检查 ENP 在集尘表面上沉积的实验室方法，如填充床柱和石英晶体微天平（QCM）方法，以及它们应用的局限性。此外，还对不同类型表面上纳米颗粒的沉积动力学进行了批判性讨论，重点讨论了其他影响因素，包括颗粒特性、颗粒聚集、离子强度、pH 值和天然有机物。最后，提出了估计 ENP 在环境中传输的未来展望和挑战。本综述将有助于更好地理解 ENP 在水系统中的作用和迁移命运。
