Despite the massive accumulation of nanoplastics (NPs) in the freshwater system, research so far has highly focused on the marine environment. NPs interaction with mineral surfaces can influence their fate in freshwater, which will further impact their bioavailability and transport to the oceans. Current work focuses on understanding NPs interaction with weathering sequence of minerals in freshwater under varying geochemical conditions. Primary mineral feldspar and weathering originated secondary minerals, i.e., kaolinite and gibbsite, were investigated for interaction with NPs under batch mode under relevant environmental conditions. Minerals-NPs interaction was also investigated in natural water samples. Results showed that the amorphous nature, small particle size, and positive surface charge of gibbsite resulted in multi-fold sorption of NPs (108.1 mg/g) compared to feldspar (7.7 mg/g) and kaolinite (11.9 mg/g). FTIR spectroscopy revealed hydrogen bonding and complexation as major players in gibbsite-NPs interaction suggesting the possibility of their co-precipitation. The continuous adsorption-desorption and limited sorption capacity of feldspar and kaolinite can be attributed to their negative surface charge, larger size, crystalline nature, and physical sorption. Therefore, both minerals can co-transport and enhance the mobility of NPs.

尽管纳米塑料（NPs）在淡水系统中大量积累，但迄今为止的研究高度集中在海洋环境上。NPs 与矿物表面的相互作用会影响它们在淡水中的命运，这将进一步影响它们的生物利用度和向海洋的运输。目前的工作重点是了解 NPs 与不同地球化学条件下淡水中矿物质风化序列的相互作用。在相关环境条件下，以批处理模式研究了原生矿物长石和风化衍生的次生矿物，即高岭石和三水铝石与纳米颗粒的相互作用。还在天然水样中研究了矿物质-NPs 的相互作用。结果表明，无定形性质，粒径小，与长石 (7.7 mg/g) 和高岭石 (11.9 mg/g) 相比，三水铝石的正表面电荷导致 NPs (108.1 mg/g) 的多倍吸附。FTIR 光谱显示氢键和络合是三水铝石-NPs 相互作用的主要参与者，表明它们可能发生共沉淀。长石和高岭石的连续吸附-解吸和有限的吸附能力可归因于它们的负表面电荷、较大的尺寸、结晶性质和物理吸附。因此，两种矿物都可以共同运输并增强 NPs 的流动性。长石和高岭石的连续吸附-解吸和有限的吸附能力可归因于它们的负表面电荷、较大的尺寸、结晶性质和物理吸附。因此，两种矿物都可以共同运输并增强 NPs 的流动性。长石和高岭石的连续吸附-解吸和有限的吸附能力可归因于它们的负表面电荷、较大的尺寸、结晶性质和物理吸附。因此，两种矿物都可以共同运输并增强 NPs 的流动性。