刚果红和Cu(Ⅱ)二元体系壳聚糖的吸附动力学  

ADSORPTION KINETICS OF CONGO RED AND Cu(Ⅱ) BY CHITOSAN UNDER BINARY SYSTEM

作　　者：李善评[1] 崔江杰[1] 李冲[1] 连军锋[1] 王洪波[1] 

机构地区：[1]山东大学环境科学与工程学院,山东济南250100

出　　处：《水处理技术》2009年第9期11-14,共4页Technology of Water Treatment

基　　金："十一五"国家科技支撑项目(2006BAJ05A12)

摘　　要：分别研究了单体系和二元体系下壳聚糖对刚果红(CR)和Cu2+的吸附性能。结果表明,单体系下,壳聚糖对CR和Cu2+的吸附较好地拟合了伪2级动力学模型。二元体系下,壳聚糖对CR和Cu2+的吸附则表现为竞争吸附,吸附量减少为单体系下壳聚糖对CR和Cu2+分别吸附时的70%和80%左右。但是,总铜(络合铜和Cu2+)的吸附量有所增加,且在二元体系下,壳聚糖对CR和铜的总吸附量相对单体系下对CR和Cu2+分别吸附时的吸附量要大。二元体系中,壳聚糖对Cu2+表现出更高的亲和力和选择性,且二者的吸附动力学仍符合伪2级动力学模型。Batch experiments were applied to study the adsorption behavior of Congo red and Cu^2＋ on chitosan in single and binary systems. Kinetic studies indicated that Congo red and Cu^2＋ ions adsorption onto chitosan in a single component system agree to the second-order kinetics. In the binary system, Congo red and Cu^2＋ exhibit competitive adsorption on ehitosan. The adsorption is reduced to about 70% and 80% of single component of Congo red and Cu^2＋, respectively. However, the total adsorption of Cu is higher, and the total adsorption is higher. In the binary system Cu^2＋ exhibits relative higher affinity and selectivity to be adsorbed on chitosan. The dynamic adsorption of Congo red and Cu^2＋ still follow the second-order kinetics.

关 键 词：壳聚糖 染料 重金属 竞争吸附 动力学 

分 类 号：TQ424[化学工程]