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中文摘要：
以离子液体（[Bmim]Cl）为反应介质,丙烯酸为单体,对纤维素进行均相接枝共聚,并采用油包水反相悬浮技术制得球形纤维素吸附剂。采用静态吸附实验方法研究了该吸附剂对水溶液中Cu^2＋的吸附性能,包括各种因素（溶液pH值,溶液初始浓度,吸附时间,吸附温度）对吸附效果的影响。研究结果表明,适当提高溶液pH值,增加溶液初始浓度,以及延长吸附时间都有利于改善吸附效果;球形纤维素吸附剂对Cu^2＋的吸附符合Langmuir吸附等温式,吸附过程是自发的放热过程;吸附剂对Cu^2＋的吸附符合二级吸附动力学模型,吸附过程由膜扩散和颗粒内扩散联合控制。球形纤维素吸附剂对Cu^2＋的具有很好的吸附性并具有良好的再生性能,可以循环使用。
英文摘要：
The spherical cellulose adsorbents,used for the removal of Cu（Ⅱ） from aqueous solutions,were obtained by homogeneous graft copolymerization of cellulose with acrylic acid and followed by water-in-oil suspension technique. Various factors affecting adsorption properties such as pH,initial concentration of Cu^2＋,adsorption time,and adsorption temperature were investigated and the adsorption thermodynamics and kinetics were also explored in detail. The results showed that the equilibrium data were well fitted to the Langmuir isotherm and the thermodynamic parameters were derived to predict the nature of adsorption process. The kinetics of adsorption followed pseudo-second-order model and the adsorption involved diffusion controlled process. The spherical cellulose adsorbents have good adsorption performance to Cu^2＋ as well as regeneration capacity.
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