-
摘要: 以竹炭粉和壳聚糖为原料,制备竹炭/壳聚糖复合吸附剂,进行扫描电镜(吸收光谱SEM)、红外吸收(FTIR)、X-射线衍射(XRD)等图谱表征,并进行Zn2+吸附试验。结果表明:①壳聚糖较好地负载在竹炭上,凸凹不平明显,蜂窝增强;复合吸附剂对Zn2+的吸附率在80 min后达到93%。②竹炭/壳聚糖复合吸附剂对Zn2+吸附过程的动力学表明,吸附过程符合多孔结构的吸附特征,方程拟合结果更符合二级动力学模型。③Zn2+吸附前后的红外吸收图谱表明,与竹炭/壳聚糖复合吸附剂吸附配位主要发生在NH2中的氮原子、OH和C=O中氧原子上。图9参11Abstract: A compound absorbent was made from bamboo charcoal and chitosan (bamboo charcoal/chitosan-BCCTS). Then the compound was characterized with a Scanning Electron Microscope(SEM),a Fourier Transform Infrared(FTIR) spectrometer,and X-ray diffraction(XRD). Using BCCTS as the absorption reagent,adsorption to Zn2+ was studied. Results showed that:(1) chitosan was efficiently loaded onto bamboo charcoal forming an increased,but uneven,honeycomb structure with an absorption reagent rate up to 93%. (2) Adsorption characteristics matched those of a vesicular structure with simulation results producing a second order kinetic equation. (3) Comparing the infrared absorption spectrogram results of Zn2+ before and after absorption showed that adsorption sites for Zn2+ on the bamboo charcoal/chitosan absorbent were mainly located at N atoms in NH2 and O atoms in OH and C O groups.[Ch,9 fig. 11 ref.]
-
Key words:
- bamboo charcoal/chitosan /
- absorption of Zn2+ ion /
- absorption kinetics /
- mechanism
-
链接本文:
https://zlxb.zafu.edu.cn/article/doi/10.11833/j.issn.2095-0756.2010.05.001
计量
- 文章访问数: 5119
- HTML全文浏览量: 371
- PDF下载量: 2050
- 被引次数: 0