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电容法去离子技术是近年来一种新型绿色的水处理或离子富集回收技术。文中以交联壳聚糖为基体制备聚吡咯/交联壳聚糖复合电极材料,研究分析了聚吡咯/交联壳聚糖复合电极用于电容法去离子技术的操作条件对其吸附性能的影响规律,并优化了操作参数。实验结果表明,工作电压在0.8～1.8V范围内,电极的吸附量随着电压的增加而增加,但增加幅度逐渐减小,当工作电压高于1.4V时,电极的吸附量基本不变;电极吸附量随着吸附时间的增加而增加,但吸附速率逐渐减小,当吸附进行100min时,电极吸附量趋于饱和,为76.40mg/g。循环吸附/脱附实验表明,复合电极在经过20次循环吸附/脱附后,其吸附量仅降低8.96%,说明电极具有良好的稳定性。
Abstract：As a novel desalination and enrichment technology, capacitive deionization(CDI) has some advantages such as low energy cast and no additional chemical contaminate, and so on. Polypyrrole/chitosan(PPy/CS) composite electrode will be obtained by chemical polymerization at room temperature. The relationship of operating conditions such as working voltage and adsorbing time and adsorbing capacity of PPy/CS electrode was investigated. Based on the results, the operating parameters were optimized. The experimental results indicated that the adsorbing capacity of PPy/CS electrode was increased with a higher working voltage, but the adding extent was decreased, and the adsorbing capacity was change little when the working voltage was more than 1.4 V. The adsorbing capacity was rose with a growing adsorbing time, and it added up to 76.40 mg/g at 100 min, then it had no remarkable change. It can be said that the saturated adsorbing capacity attained at 100 min of adsorbing time. Result of mulit-adsorption/deadsorption experiment shown that the adsorbing capacity of PPy/CS electrode only declined 8.96% after 20 cycles, mean a fine stability.
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基本信息:
DOI：10.16026/j.cnki.iea.2018040347
中图分类号:O647.3;X703
引用信息:
[1]张玉洁,薛娟琴,李飞,等.聚吡咯/壳聚糖复合电极对Cu~(2+)吸附性能研究[J].离子交换与吸附,2018,34(04):347-356.DOI:10.16026/j.cnki.iea.2018040347.
基金信息:
陕西省自然科学基金青年项目(No.2016JQ5053);; 陕西省教育厅专项(NO.14JK1422)