Department of Chemistry, Faculty of Science, Universiti Teknologi Malaysia, 81310 UTM Johor Bahru, Johor, Malaysia.
Department of Chemistry, Faculty of Science, Universiti Teknologi Malaysia, 81310 UTM Johor Bahru, Johor, Malaysia; Centre for Sustainable Nanomaterials, Ibnu Sina Institute for Scientific and Industrial Research, Universiti Teknologi Malaysia, 81310 UTM Johor Bahru, Johor, Malaysia.
Int J Biol Macromol. 2019 Jul 15;133:1260-1267. doi: 10.1016/j.ijbiomac.2019.04.188. Epub 2019 Apr 29.
Grafting of crosslinked chitosan with monomer, N-vinyl-2-pyrrolidone, has been carried out to investigate its adsorption capacity toward Orange G (OG) from aqueous solutions. The adsorption performance of modified chitosan (cts(x)-g-PNVP) was examined and compared with that of the unmodified chitosan. The effects of initial pH, contact time and initial dye concentration were investigated in a batch system. The experimental data were correlated with the Langmuir and Freundlich isotherm models. The maximum adsorption capacity of cts(x)-g-PNVP (63.7mgg) based on Langmuir equation was relatively higher than that of the unmodified chitosan (1.7mgg). The kinetic studies showed that the adsorption process was consistent with the pseudo-second order kinetic model. Interaction mechanisms between OG and cts(x)-g-PNVP were also proposed. The overall results suggested that the prepared cts(x)-g-PNVP stands a good candidate as adsorbent for removal of anionic dye from aqueous solutions.
用单体 N-乙烯基-2-吡咯烷酮对交联壳聚糖进行接枝，以研究其对水溶液中橙 G（OG）的吸附能力。考察了改性壳聚糖（cts(x)-g-PNVP）的吸附性能，并与未改性壳聚糖进行了比较。在批处理系统中考察了初始 pH 值、接触时间和初始染料浓度的影响。实验数据与 Langmuir 和 Freundlich 等温模型相关联。根据 Langmuir 方程，cts(x)-g-PNVP 的最大吸附容量（63.7mgg）相对高于未改性壳聚糖（1.7mgg）。动力学研究表明，吸附过程符合准二级动力学模型。还提出了 OG 与 cts(x)-g-PNVP 之间的相互作用机制。总体结果表明，所制备的 cts(x)-g-PNVP 是一种很有前途的吸附剂，可用于从水溶液中去除阴离子染料。
