Life cycle assessment instructed preparation of wood-based filtration device with efficient water purification and oil reclamation by deep eutectic solvent

Organic oils and dyes are universal contaminants in the water environment that is exceptionally hazardous to health. However, low flux and degradation efficiency hinder those contaminants remove. Herein, the wood-based filtration device handles oily-dyed water by deep eutectic solvent (DES) treatment, exhibiting high specificity surface area and porosity. Life cycle assessment (LCA) provides evidence that the DES one-step treatment introduces fewer environmental impacts (EI) than the traditional two-step method of wood pretreatment. Moreover, DES-treated wood substrate (DTWS) decorated with palladium nanoparticles (PdNPs) shows high oil/water separation efficiency (98.9%) and excellent catalytic activity to convert MB (99.8%). Compared with numerous existing filtration membrane materials, the enhancement factors for outstanding oil/water separation and excellent catalytic performances are related to the high porosity and PdNPs content by adjusting DES treatment time. This wood-based filtration device with environmental-friendly, high flux, and excellent degradation efficiency gains optimistic expectations for practical sewage treatment application.