Chemistry Department, Universidade Federal da Paraíba, 58051-970 João Pessoa, Paraíba, Brazil.
Int J Biol Macromol. 2013 Oct;61:471-8. doi: 10.1016/j.ijbiomac.2013.08.017. Epub 2013 Aug 22.
Chitosan-montmorillonite (KSF-CTS) beads were prepared by crosslinking with pentasodium tripolyphosphate (TPP). Montmorillonite (KSF-Na), CTS and KSF-CTS biocomposite were used to remove Cu(II) from aqueous solutions. These materials were characterized before and after copper adsorption by XRD, FTIR and thermogravimetry (TG). The data indicated that the adsorption process proceeds kinetically according to a pseudo-second-order model. The adsorption processes were adjusted to the Langmuir model for KSF-Na and CTS and to the Temkin model for KSF-CTS. The maximum adsorption capacity followed the order CTS>KSF-CTS>KSF-Na. Percentages desorption of copper ions from the KSF-CTS composite after three desorption cycles were 86%, 85% and 84%, respectively, using EDTA as regeneration agents.
壳聚糖-蒙脱石（KSF-CTS）珠粒是用五聚磷酸钠（TPP）交联制备的。蒙脱石（KSF-Na）、壳聚糖（CTS）和 KSF-CTS 复合材料被用于从水溶液中去除 Cu(II)。这些材料在吸附铜前后通过 XRD、FTIR 和热重分析（TG）进行了表征。数据表明，吸附过程根据拟二级动力学模型进行。吸附过程分别被调整为 Langmuir 模型（KSF-Na 和 CTS）和 Temkin 模型（KSF-CTS）。最大吸附容量的顺序为 CTS>KSF-CTS>KSF-Na。用 EDTA 作为再生剂，三次解吸循环后，KSF-CTS 复合材料中铜离子的解吸率分别为 86%、85%和 84%。
