酰胺接枝ACF的制备及其在处理水体中重金属Cu^(2+)的应用

Grafting Amide onto Activated Carbon Fiber's Surface and Its Application in the Disposal of Heavy Metal Ion Cu^(2+)

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110℃加热回流在其表面接枝胺基、酰胺基团对其进行改性,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)检测被处理溶液中的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+吸附去除能力具有显著的优势,前者约为后者的1.5倍.

The modification of ACF was carried out by converting the surface carboxyl of PAN-ACF to acyl-chlorine reaction with SOCl2,followed by heating reflux at 110 ℃ with ethylene diamine grafted the amide onto the ACF surface.The surface structure,element combination state and content variation of ACF before and after grafting were characterized by FTIR and XPS.And the concentration variation of Cu2＋ was detected by ICP-AES when NH-ACF was applied to remove the Cu2＋ in water as well as the maximal adsorption capacity qmax was obtained.The results showed that the modified ACF had higher adsorption and removal capacity,comparing to the unmodified.Its qmax value was about 1.5 times of unmodified one′s.