Preparation of SA-Fe Cation Exchange Membrane and It's Application in Electrodialysis for Treating Wastewater

摘要

An insoluble SA-Fe membrane was prepared by being linked soluble sodium alginate with FeCl_3. IR spectrum indicated that Fe~(3+) was linked with -COOH and -OH in SA membrane. As a cationic exchanging membrane in electrodialysis the membrane was applied in treating inorganic wastewater with high concentration of inorganic ammonia and azote. The results of experiment showed that it was well-selective to ammonia and azote. The percentage of the removal of ammonia and azote in wastewater was up to 80%. Sodium alginate (SA) is a nature macromolecule polysaccharide, which can be dissolved in water at room temperature. SA molecules consist of the residues of β-D-mannuronic and α-L-guluronic acids. In this paper, an insoluble SA-Fe membrane was prepared by being linked soluble sodium alginate and was applied in treating inorganic wastewater with high concentration of inorganic ammonia and azote.