Fabrication and Application of Removing Microcystin of CTA-based Forward Osmosis Membrane

Abstract

CTA-based membranes for forward osmosis (FO) were prepared by immersion precipitation. Casting composition and coagulation conditions-solvent/acetone ratio, temperature, evaporation time of coagulation bath-were optimized to obtain membranes with best performance. Membranes were characterized by various available methods to testify the performance in forward osmosis system. The CTA membrane showed a water flux higher than 3.8 LMH and a good NaCl rejection of 95% when using 2 M glucose solution as the draw solution and 0.6 M NaCl solution as feed solution. Besides, experiments were attempted to remove microcystin by applying FO technology. More than 80% of the microcystin removal rate was obtained in this experiment.