The performance of electropositive nanofibrous filter media

► Four types of electropositive nanofibrous filter with and without nano powdered activated carbon were investigated, named EPN-1, EPNPAC-2, EPN-3, EPNPAC-4. ► The Zeta potential, specific surface area, porosity and permeation flux of nanofibrous filter was measured. The isoelectric point and pure water permeability coefficient were also calculated. ► The microstructures and surface characteristics of nanofibrous were supported in the paper. The foundation of nanofilter was based on the results of this experiment.