摘要
在本文利用聚丙烯腈基活性碳纤维(PAN-ACF)表面存在的羧基与氯化亚砜SOCl2发生酰氯化反应后与乙二胺110oC加热回流在其表面接枝胺基、酰胺基团对其进行了改性,用傅立叶转换红外光谱仪(FTIR)、X射线光电子能谱仪(XPS)对改性前后活性碳纤维的表面结构和元素结合态及含量变化进行了表征并将改性后的活性碳纤维(NH-ACF)应用于水体中Cu2+离子的去除处理,用电感耦合等离子体原子发射光谱仪(ICP-AES)检测了所处理溶液中的Cu2+离子浓度变化进而得出Cu2+离子在NH-ACF上的最大吸附量qmax。结果表明,NH-ACF比未改性处理的PAN-ACF对Cu2+吸附去除具有显著的优势。
The modification of ACF by two-step organic reaction was carried out, which has never been reported before. First, the surface carboxyl of ACF were converted to acyl-chlorine by reacting to SOCl2, then the acyl-chlorine were reacted to diamine in order to graft amide onto the ACF’ surface. It was obvious that amide was successfully grafted onto the surface of ACF according to the results of FT-IR and XPS. In the disposal of Cu2+, a toxic heavy metal, ACF before and after grafting was applied as its sorbent and ICP-AES was utilized to detect the change of Cu2+’s concentration. Comparing the maximal adsorption capacity qmax, we found that the modified ACF had the higher adsorption capacity, its qmax value was about 1.5 times of unmodified one’s. The enhancement can be ascribed to the formation of coordination bond between N atom and Cu2+.
