A cationic chelating polymer, namely biopolymer chitosan CHI with a molecular weight of 117 kDa is employed in the present study to bring about the retention of azoic dyes from its aqueous solutions by way of polymer enhanced ultrafiltration (PEUF). The effects of process parameters, namely, operating time, CHI and sodium chloride concentrations, transmembrane pressure, and pH of solution on the retention rate and permeate flux were examined. CHI enhanced ultrafiltration achieved in the presence of CHI shows an increasing in the retention rate up to 86% for methyl orange (MO) and 89% for Direct Blue 71 (DB71). The retention rate of the studied azoic dyes decreases with sodium chloride concentration increasing. High retention percentage was also obtained at pH range from 2 to 6. In addition, the permeate flux decreases when both, feed chitosan concentration and pH of solution increase.

在本研究中，采用阳离子螯合聚合物，即分子量为117 kDa的生物聚合物壳聚糖CHI，通过聚合物增强超滤（PEUF）使其水溶液中保留了偶氮染料。研究了工艺参数，即操作时间，CHI和氯化钠浓度，跨膜压力和溶液的pH对保留率和渗透通量的影响。在存在CHI的情况下，CHI增强的超滤表现出保留率的提高，甲基橙（MO）高达86％，直接蓝71（DB71）高达89％。研究的偶氮染料的保留率随氯化钠浓度的增加而降低。在2至6的pH范围内，也获得了较高的保留率。此外，当两种情况下，