Physical Chemistry and Soft Matter, Wageningen University and Research, Wageningen, the Netherlands; College of Resources and Environment, Huazhong Agricultural University, Wuhan 430070, PR China.
College of Resources and Environment, Huazhong Agricultural University, Wuhan 430070, PR China.
Adv Colloid Interface Sci. 2020 Jun;280:102138. doi: 10.1016/j.cis.2020.102138. Epub 2020 Mar 10.
Aqueous sorption processes play an important role in, for example, pollutant binding to natural nanoparticles, colloid stability, separation and enrichment of components and remediation processes. In this article, which is a tribute to Hans Lyklema, models of localized (ad)sorption of molecules and ions from aqueous solution on homogeneous and heterogeneous nanoparticles are presented. The discussed models range from ideal monocomponent sorption on homogeneous (Langmuir) and heterogeneous sites, to multicomponent ideal sorption on homogeneous and heterogeneous sites, multicomponent multisite ion complexation with charge distribution (CD-MUSIC) and non-ideal competitive adsorption on heterogeneous sites (NICA). Attention is also paid to lateral interaction, site-induced aggregation, binding stoichiometry and multilayer formation. Electrical double layer models are discussed in relation to ion binding on impermeable and permeable nanoparticles. Insight in models that can describe sorption of molecules and ions on nanoparticles leads to awareness of the limitations of using simple models for complex systems and is needed for the selection and application of an appropriate model for a given system. This is relevant for all practical sorption processes and for a better understanding of the role of natural nanoparticles in the binding of nutrients and pollutants.
水相吸附过程在污染物与天然纳米粒子结合、胶体稳定性、成分分离和浓缩以及修复过程等方面起着重要作用。本文是对 Hans Lyklema 的致敬，介绍了从水溶液中在均相与多相纳米粒子上局部（吸附）吸附分子和离子的模型。讨论的模型范围从均相（朗缪尔）和多相位点上的理想单组分吸附，到均相和多相位点上的理想多组分吸附、带有电荷分布的多组分多位点离子络合（CD-MUSIC）以及多相位点上的非理想竞争吸附（NICA）。还关注了侧向相互作用、位点诱导聚集、结合化学计量和多层形成。讨论了与不可渗透和可渗透纳米粒子上离子结合相关的双电层模型。对可描述纳米粒子上分子和离子吸附的模型的深入了解，导致人们意识到在复杂体系中使用简单模型的局限性，并需要为给定体系选择和应用适当的模型。这对于所有实际的吸附过程以及更好地理解天然纳米粒子在营养物质和污染物结合中的作用都很重要。
