<p><span style=color: rgba(23 43 77 1)>This reprint offers updated studies on functional membranes for strategic areas such as water cleaning and reuse environmental remediation drug delivery energy recovery and CO</span><sub style=color: rgba(23 43 77 1)>2</sub><span style=color: rgba(23 43 77 1)>&nbsp;capture but also the recycling of bio-based and ecofriendly materials for membrane manufacturing and purification processes that impact important domains of society and industry. Theoretical modelling structure-transport assessment and experimental findings contribute to creating a multidisciplinary representation of membrane science in its many facets. This reprint is a useful reference for inspiring scientists and students who want to tackle scientific and societal challenges within a sustainable and circular chemistry framework.</span></p>