文献类型：期刊文献

英文题名：Surface Charge Regulation of Nanoplastics in Aquatic Environments

作者：Xu, Zheng[1,2,3];Yang, Jie[1,2,4];Lian, Cheng[1,2,3];Xu, Shouhong[1,2,3];Liu, Honglai[1,2,3]

机构：[1]East China Univ Sci & Technol, Shanghai Engn Res Ctr Hierarch Nanomat, Frontiers Sci Ctr Materiobiol & Dynam Chem, State Key Lab Chem Engn & Low Carbon Technol, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Sch Chem & Mol Engn, Shanghai 200237, Peoples R China;[3]East China Univ Sci & Technol, Sch Chem Engn, State Key Lab Chem Engn & Low Carbon Technol, Shanghai 200237, Peoples R China;[4]Dongfeng Motor Corp Res & Dev Inst, Wuhan 430000, Hubei, Peoples R China

年份：2025

卷号：129

期号：50

起止页码：12952

外文期刊名：JOURNAL OF PHYSICAL CHEMISTRY B

收录：;EI(收录号：20255119755004);WOS:【SCI-EXPANDED(收录号:WOS:001632746200001)】；

基金：This work was sponsored by the National Key Research and Development Program of China (Project No. 2024YFC3712700), the National Natural Science Foundation of China (No. 22378112).

语种：英文

外文关键词：Association reactions - Health hazards - Particle size analysis - Sulfur compounds - Surface reactions

摘要：Nanoplastics (NPs) pose significant environmental and health hazards, with their aquatic transport and aggregation being critically governed by surface charge properties. However, the factors controlling NPs' surface charge remain incompletely understood. This study develops a coupled model that integrates the Poisson-Nernst-Planck (PNP) equation (encompassing electrostatic field and diffusive transport) with a surface adsorption reaction model. Employing polystyrene NPs adsorbing sulfate ions as a model system, we systematically analyze the effects of particle size, shape, and ionic exclusion on surface charge across varying pH. Interparticle interaction energies are quantified via Derjaguin-Landau-Verwey-Overbeek (DLVO) theory. This work provides quantitative insights into the mechanisms governing the variability of NPs' surface charge. The findings offer a theoretical basis for developing strategies to control the aggregation and removal of NPs in aqueous environments.