强碱阴离子交换纤维对活性染料的吸附性能研究

采用聚丙烯强碱阴离子交换纤维对活性艳黄等几种活性染料进行静态吸附、动态吸附和再生实验,并与同类型树脂相比较.结果表明,强碱阴离子交换纤维对活性艳黄的吸附曲线符合Langmuer等温方程,吸附反应以液膜扩散为主,反应速率随温度和pH值的升高而增加,并且远大于树脂的吸附反应速率.动态吸附表明,强碱阴离子交换纤维对活性艳蓝、活性艳黄和活性艳红的吸附处理量依次增大.利用硝酸乙醇混合溶液再生,再生效率85.7%,纤维能够反复多次使用,可以作为活性染料废水的脱色剂使用.

Adsorption properties of anion ion-exchange fiber for reactive dyes

Reactive yellow X-RG and other two reactive dyes were adsorbed on strong base anion exchanger fiber. Adsorption behaviors were studied by using static and dynamic adsorption methods. Experimental results show that the adsorption behavior for reactive yellow X-RG obeys the Langmuir isotherm equation. Adsorption kinetics was mainly affected by expansion of the liquid surface. Adsorption rate of fiber is higher than resin and increase with the improving of temperature and pH. Dynamic adsorption capacity for reactive blue X-BR, reactive yellow X-RG and reactive red X-3B were increasing. HNO3-CH3OH solution can be used to regenerate the satu- rated fiber and the regenerate rate was 85.7 %. Strong base anion ion exchanger fiber can be used as discoloring agent for wastewater of reactive dyes.