Department of Chemical Engineering, National United University, Miao-Li 360, Taiwan.
J Environ Manage. 2010 Mar-Apr;91(4):798-806. doi: 10.1016/j.jenvman.2009.10.018. Epub 2009 Nov 14.
A literature survey on liquid-phase adsorption of selected heavy metals including Cu(II), Zn(II), Ni(II), Cd(II), Pb(II), Hg(II), and Cr(VI) on chitosan (CTS) and its derivatives was made from the viewpoint of adsorption capacity. This parameter was obtained from the Langmuir fit of isotherm data. The magnitude of adsorption capacity of heavy metals on pristine CTS was also used to discuss the mechanism of adsorption; that is, how many amino groups in CTS chains would coordinate with one heavy metal ion. Furthermore, a newly defined parameter, the approaching equilibrium factor R(L), was proposed to quantitatively indicate the favorability of the related adsorption process and to judge the correctness of adsorption capacity determined by the Langmuir equation.
从吸附容量的角度对壳聚糖（CTS）及其衍生物对 Cu(II)、Zn(II)、Ni(II)、Cd(II)、Pb(II)、Hg(II) 和 Cr(VI) 等几种重金属的液相吸附的文献进行了综述。该参数是通过等温线数据的朗缪尔拟合获得的。还利用重金属在原始 CTS 上的吸附容量的大小来讨论吸附机制，即 CTS 链上有多少个氨基与一个重金属离子配位。此外，还提出了一个新定义的参数，即接近平衡因子 R(L)，用于定量表示相关吸附过程的有利程度，并判断由朗缪尔方程确定的吸附容量的正确性。
