期刊论文

Xia, L.-S.

中文

化学工程

1005-9954

2010

38

11

10-13

10.3969/j.issn.1005-9954.2010.11.003

(09w025):湖南省高等学校科研委托项目

本校为第一且通讯机构

为了了解榕树叶吸附铀的过程机制,改善榕树叶吸附能力,提高铀的去除率,采用红外光谱仪,扫描电镜仪,X射线衍射仪,X射线光电子能谱仪等现代分析仪器探讨榕树叶吸附铀的机理.结果表明:榕树叶主要由碳水化合物,木质素及纤维素等组成,其吸收峰是由C=O的伸缩振动峰,苯环的骨架振动峰,苯羟基中C--O的伸缩振动峰构成;吸附UO22+后,榕树叶细胞的表面形态发生了改变,表面上分布的空隙和空洞减少,呈现出较多电子不透明的微小颗粒,相互黏合在一起,但没有形成新晶形结构,只是吸附过程中部分晶相转变为非晶相,其基本结构仍保持完整;因此榕树叶吸附铀的机理为表面络合吸附机理,UO22+主要与细胞表面上--OH,C=O,P-...

In order to realize the process mechanism that banyan leaves (B. L) adsorb uranium, improve its adsorbing capacity and enhance the dislodging rate of uranium, the adsorption mechanisms of uranium with B. L were studied by FTIR, SEM, XRD, XPS spectroscopy. The results show that B. L contains carbohydrates, lignin and cellulose and so on. The adsorbing peaks are made up of stretching vibration of CO, frame stretching vibration of benzene ring and the stretching vibration of C-O. After the B. L adsorption of UO22+, the B. L cell surface morphology is changed, the gaps and caverns on B. L surface ...