Departamento de Química, Universidade Federal de Santa Catarina, 88040-900 Florianópolis, SC, Brazil.
Bioresour Technol. 2011 Oct;102(19):8769-76. doi: 10.1016/j.biortech.2011.07.057. Epub 2011 Jul 22.
In this study, chitosan (CTS) was crosslinked with both epichlorohydrin (ECH) and triphosphate (TPP), by covalent and ionic crosslinking reactions, respectively. The resulting adsorbent (CTS-ECH-TPP) was characterized by SEM, CHN, EDS, FT-IR and TGA analyses, and tested for metal adsorption. The adsorbent was used in batch experiments to evaluate the adsorption of Cu(II) and Cd(II) ions in single and binary metal solutions. In single metal solutions the maximum adsorption capacities for Cu(II) and Cd(II) ions, obtained by Langmuir model, were 130.72 and 83.75 mg g⁻¹, respectively. Adsorption isotherms for binary solutions showed that the presence of Cu(II) decreased Cd(II) adsorption due to a significant competition effect, that is, the adsorbent was selective towards Cu(II) rather than Cd(II).
在这项研究中，壳聚糖（CTS）分别通过共价和离子交联反应与表氯醇（ECH）和三磷酸（TPP）交联。所得吸附剂（CTS-ECH-TPP）通过 SEM、CHN、EDS、FT-IR 和 TGA 分析进行了表征，并用于金属吸附测试。吸附剂在批量实验中用于评估 Cu(II)和 Cd(II)离子在单金属和双金属溶液中的吸附。在单金属溶液中，通过 Langmuir 模型获得的 Cu(II)和 Cd(II)离子的最大吸附容量分别为 130.72 和 83.75 mg g⁻¹。对于二元溶液的吸附等温线表明，Cu(II)的存在由于显著的竞争效应而降低了 Cd(II)的吸附，也就是说，该吸附剂对 Cu(II)的选择性大于 Cd(II)。
