中文摘要：

以橘子皮为基体，经环氧氯丙烷交联后，以Ce^4＋为引发剂将丙烯酸甲酯单体接枝到橘子皮上，再经过皂化制备改性橘子皮生物吸附剂。研究溶液pH、吸附时间和Cu^2＋初始浓度对生物吸附剂吸附性能的影响。结果表明，在pH值为5．5，Cu^2＋初始质量浓度为50mg／L，吸附时间为3h的条件下，该生物吸附剂对Cu^2＋去除率为94．6％，吸附容量为24．41mg／g。Cu^2＋在该生物吸附剂上的吸附过程可以用准二级动力学方程很好地描述。吸附等温线结果表明，该生物吸附剂对Cu^2＋的吸附用Freundlich方程拟合效果优于用Langmuir方程拟合效果。将该生物吸附剂用于含Cu^2＋ 5．8mg／L的电镀废水，Cu^2＋去除率可达97％。通过红外光谱表征该生物吸附剂的结构，说明羧基和羟基与金属离子的结合引起该生物吸附剂对Cu^2＋的吸附。该生物吸附剂可以再生重复使用4次以上。

英文摘要：

The chemically modified orange peel was prepared from hydrolysis of the grafted copolymer, which was synthesized by interacting methyl acrylate with cross-linking orange peel. Various factors were investigated by batch experiments, including pH value, adsorption time and initial concentration of Cu^2＋, to study their effects on adsorption characteristics of the biosorbent on Cu^2＋. The results show that when pH value is 5.5 and the initial concentration of Cu^2＋ is 50 mg/L, the removal rate achieves 94.6% after 3 h adsorption, and the adsorption capacity is 24.41mg/g. The kinetic characteristics of Cu^2＋ biosorption were investigated and the adsorption processes were found to follow pseudo-second order type adsorption kinetics. The adsorption isotherms results indicate that Freundlich model fits the adsorption process much better than the Langmuir model. The removal rate of 5.8 mg/L Cu^2＋ in 50 mL of electroplating wastewater is 97% when 1 g of the biosorbent is used at pH value of 5.5, The biosorbent was characterized by using infrared spectroscopy, The analysis of IR spectrum indicates that the adsorption of Cu^2＋ by the biosorbent caused the combination of carboxyl and hydroxyl groups with heavy metal. The biosorbent is suitable for repeated use more than four cycles.