聚酰胺胺-环糊精共聚物对水中2,4-二氯酚的吸附  

Adsorption of 2,4-dichlorophenol in aqueous solutions by polyamidoamine-cyclodextrin copolymer

作　　者：李宁[1] 王超[1] 

机构地区：[1]重庆工商大学环境与生物工程学院,重庆400067

出　　处：《环境工程学报》2012年第12期4367-4371,共5页Chinese Journal of Environmental Engineering

基　　金：国家自然科学基金资助项目(20907076);重庆高校创新团队建设计划(KJTD201020)

摘　　要：采用新型聚酰胺胺-环糊精共聚物(PAMAM-CD)静态吸附模拟废水中的2,4-二氯酚(DCP)。通过单因素和正交实验,研究了吸附时间、pH值、PAMAM-CD投加量(W)、溶液体积(V)、吸附温度(T)、溶液初始浓度(C0)等因素对吸附的影响,初步探讨了PAMAM-CD对DCP的吸附机理。实验结果表明:吸附条件对吸附容量(qe)的影响顺序为:C0>W>V>T。最佳吸附条件:C0=150 mg/L,W=25 mg,V=75 mL,T=15℃。在此条件下的qe平均值达105.6 mg/g,说明PAM-AM-CD对DCP吸附能力强,吸附机理主要是因PAMAM-CD对DCP的包合、氢键等作用。Batch adsorption experiments were carried out for the removal of 2, 4-dichlorophenol （DCP） from aqueous solutions using a novel polyamidoamine-cyclodextrin copolymer （PAMAM-CD）. The main factors which might affect the adsorption capacity were investigated by single factor tests, including contact time, pH, adsorbent dosage（ W）, solution volume （ V）, DCP initial concentration （Co） and adsorption temperature （T）. The adsorption mechanism of PAMAM-CD toward DCP was studied. The results of the orthogonal test indicated that the effect of adsorption conditions on the adsorption capacity was in the following order： CO 〉 W 〉 V 〉 T. And the most suitable adsorption conditions were determined as follows： Co = 150 mg/L, W =25 mg, V = 75 mL, T = 15℃. The adsorption capacity of DCP was even up to 105.6 mg/g under these conditions. The adsorp- tion mechanism was probably simultaneously dominated by complex, hvdrogen bonding, etc.

关 键 词：聚酰胺胺 环糊精 2 4-二氯酚 吸附 

分 类 号：X703[环境科学与工程—环境工程]