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80min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。
A compound absorbent was made from bamboo charcoal and chitosan（bamboo charcoal/chitosanBCCTS）.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.
出处
《浙江林学院学报》
CAS
CSCD
北大核心
2010年第5期641-645,共5页
Journal of Zhejiang Forestry College
基金
浙江省科学技术重点项目(2006C13052)
浙江省宁波市鄞州区科技局资助项目(2008)
关键词
竹炭/壳聚糖
吸附Zn2+
反应动力学
机制
bamboo charcoal/chitosan
absorption of Zn2＋ ion
absorption kinetics
mechanism
