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.
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 ferrat. The FT- IR spectrum analysis show that the two poles of the CS- CIVIC BM contained -N=CRH2^＋ and -COO functional groups, respectively. The swelling characteristic of the CS- CMC BM was improved. Compared to CS and CIVIC membranes, the CS- CMC BM was also more stabile in both strong acid and base solutions. The oxide layer on the east 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/cm^2, frequency of square wave pulse of 2 Hz, electrolysis time of 6 hours, average current efficiency of 51.2 % and at room temperature.
出处
《膜科学与技术》
CAS
CSCD
北大核心
2007年第6期72-76,共5页
Membrane Science and Technology
基金
福建省发改委项目(DH-361)
福建省计委项目(JH-006)
关键词
双极膜
壳聚糖
羧甲基纤维素
胶体滴定
高铁酸盐
bipolar membrane
chitosan
carboxymethylcellulose
colloid titration
ferrate
