Ceramic Ultrafiltration and Nanofiltration Membrane for Removal of Black Carbon Ink, Blue Dye Ink, Fe3+ and Cu2+ Ions from Water

This paper reports on performance of ceramic ultrafiltration and nanofiltration membrane to remove carbon ink particles, blue ink dye, Fe3+ and Cu2+ ions from water. The ceramic filters have α-Al2O3 flat-sheet supporter, with TiO2 nanoparticles sintered membrane on the surface of supporter. Carbon ink particles, blue ink dye, FeCl3 and CuSO4 water solution were used to test their filtration performance. The results show that the ceramic ultrafilter can 100% decolored the black carbon solution. The nanomembrane can 100% decolored blue ink dye, FeCl3 and CuSO4 solution. Electrical conductivity rate of ironflocculated dye waste water from a textile company can be reduced by the nanomembrane from 4000 μs/cm to 1000 μs/cm. It assumed that the ultramembrane pore size is about 10 nm, and the nanomembrane pore size might be 1 nm. The performance can fulfill the requirements for removal of heavy metal ions, materials with molecule bigger than 250 Dalton and salts retention from water, air filtration of novel corona virus defending mask and negative pressure patient room.