将活性炭(AC)浸渍于5%~15%的柠檬酸钠溶液中,制得柠檬酸钠-活性炭(Nx-AC,x%为柠檬酸钠溶液质量浓度).利用N2吸附法、傅里叶转换红外光谱法和Boehm滴定法表征了Nx-AC的孔结构和表面化学性质,并采用静态吸附法,考察了Nx-AC及吸附饱和再生后的Nx-AC对铜离子的吸附性能.结果表明,表面总酸度对Nx-AC的吸附性能有显著的影响.随着柠檬酸钠浸渍液浓度的增加,Nx-AC对铜离子的吸附容量逐渐增大,其中,吸附剂N15-AC对铜离子的吸附容量可达AC对铜离子的吸附容量的2.76倍.一次再生和二次再生后的N15-AC对铜离子的吸附容量分别可达新鲜N1s-AC的98.2%和95.9%.
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