【摘要】 分别采用戊二醛和三价铁离子改性壳聚糖和羧甲基纤维素,制备了CS-CMC聚合物双极膜,并被用于电解法制备水处理剂高铁酸盐.经IR分析表明,该聚合物膜两极分别含有N CHR、—COO—官能团.CS-CMC双极膜的溶胀率较小,能稳定存在于浓酸、浓碱溶液中.在电极上迭加变频不对称脉冲方波可及时去除阳极表面的氧化膜.在14 mol/L的NaOH溶液中,室温下以5 mA/cm2的电流密度、脉冲方波频率2 Hz,电解6 h,电流效率平均为51.27%,高铁酸盐浓度达到37 mmol/L.更多还原

【Abstract】 The CS-CMC bipolar membrane(BM) was prepared by using of the modified chitosan and carboxymethylcellulose,and was used as the septum of the cylinder electrolytic bath for the electro-generation of ferrate.The FT-IR spectrum analysis show that the two poles of the CS-CMC BM contained NCRH2+ and —COO-functional groups,respectively.The swelling characteristic of the CS-CMC BM was improved.Compared to CS and CMC membranes,the CS-CMC BM was also more stabile in both strong acid and base solutions.The oxide layer on the cast iron anode could be removed by applying a asymmetrical square wave to the electrode.The ferrate concentration reached 37.0 mmol/L in 14 mol/L NaOH solution under the conditions of current density of 5 mA/cm2,frequency of square wave pulse of 2 Hz,electrolysis time of 6 hours,average current efficiency of 51.2% and at room temperature.更多还原