Laboratory of Environmental Technology, INET, Tsinghua University, Beijing 100084, PR China.
J Hazard Mater. 2012 Jun 30;221-222:155-61. doi: 10.1016/j.jhazmat.2012.04.026. Epub 2012 Apr 19.
The competitive adsorption of Pb(II), Cu(II) and Zn(II) onto a novel xanthate-modified magnetic chitosan (XMCS) was systematically investigated in single and ternary metal systems. In single system, equilibrium studies showed that the adsorption of Pb(II), Cu(II) and Zn(II) followed the Langmuir model and the maximum adsorption capacities were found to be 76.9, 34.5 and 20.8mg/g, respectively. In ternary system, the combined action of the metals was found to be antagonistic and the metal sorption followed the order of Pb(II)>Cu(II)>Zn(II); the Langmuir isotherm fitted the data of Pb(II) and Cu(II) well while the isotherm data of Zn(II) correlated well with the Freundlich model. The Fourier transform infrared spectroscopy (FTIR) and X-ray photoelectron spectra (XPS) studies showed that the thiol and amino group participated in the adsorption of Pb(II), Cu(II) and Zn(II).
系统研究了新型黄原酸酯修饰的磁性壳聚糖（XMCS）在单一和三元金属体系中对 Pb(II)、Cu(II)和 Zn(II)的竞争吸附。在单一体系中，平衡研究表明，Pb(II)、Cu(II)和 Zn(II)的吸附符合 Langmuir 模型，最大吸附容量分别为 76.9、34.5 和 20.8mg/g。在三元体系中，发现金属的联合作用是拮抗的，金属吸附遵循 Pb(II)>Cu(II)>Zn(II)的顺序；Langmuir 等温线很好地拟合了 Pb(II)和 Cu(II)的数据，而 Zn(II)的等温线数据与 Freundlich 模型很好地相关。傅里叶变换红外光谱（FTIR）和 X 射线光电子能谱（XPS）研究表明，巯基和氨基参与了 Pb(II)、Cu(II)和 Zn(II)的吸附。
