Water Research, Год журнала: 2025, Номер 281, С. 123678 - 123678

Опубликована: Апрель 24, 2025

The application of nanofiltration (NF) membranes for resource recovery, particularly lithium (Li) extraction from high magnesium (Mg) brines, is a rapidly growing research area. However, the trade-off between Li+ purity and recovery remains challenging. In our study, we extend widely adopted Donnan Steric Pore Model with Dielectric Exclusion (DSPM-DE) to analyze membrane structure-property-performance relationships at process scale. For first time, quantify how intrinsic parameters (e.g., pore size, effective thickness, charge density) affect under module-scale processes. Under this framework, demonstrate that electrically neutral positively charged outperform negatively membranes, albeit cost slightly higher required hydraulic pressure. Notably, smaller size yet water permeance (40-80 L m-2 h-1 bar-1) are preferred, which could simultaneously achieve excellent (∼98 %) (∼93 in single-pass process, effectively overcoming purity-recovery correlation. We further negative rejection plays crucial role correlation by significantly increasing recovery. Nevertheless, poor system flux distribution inadvertently observed regions where strong occurs, highlighting need careful consideration balance stability performances. Our study identifies critical achieving optimal performance scale, offering fundamental insights designing high-performance

Язык: Английский