壳聚糖/聚氨酯多孔材料对Cu^(2+)、Cd^(2+)的吸附研究

Adsorption Performance of Chitosan/Polyurethane Porous Composite Material for Cu^(2+) and Cd^(2+) in Water

将壳聚糖、聚醚多元醇、甲苯二异氰酸酯混合发泡,制备了壳聚糖/聚氨酯(Cs/PU)多孔复合材料,利用原子吸收光谱研究了Cs/PU对水中Cu2+、Cd2+的吸附能力。结果表明:在28℃条件下,当吸附时间为30min,溶液pH=4～5时,Cu2+的最高去除率为96.67%,溶液pH=6～7时,Cd2+的去除率为95.67%。Cd2+、Cu2+的饱和吸附率容量分别为28.78mg/g和25.32mg/g。两种金属离子共存时,Cs/PU对Cu2+的选择性大于Cd2+。

Chitosan/polyurethane ( Cs/PU) porous composite based on chitosan, polyether polyols and tolylenediisocyanate ( TDI) was prepared. Adsorption of Cu2+、Cd2+ on Cs / PU was studied with the atomic adsorption spectroscopy. The results showed that the removing rate of Cu2+ reached 96.67% after adsorbing for 10 min at pH 4～5 and 28℃, the removing rate of Cd2+ reached 95.67% after adsorbing for 30 min at pH 6～7 and 28℃. The adsorption capacity of Cs/PU for Cu2+ and Cd2+ was 28.78mg/g and 25.32mg/g respectively. Th...