改性壳聚糖珠对水溶液中橙 G 的增强去除：性能与机理。
Enhanced removal of Orange G from aqueous solutions by modified chitosan beads: Performance and mechanism.
机构信息
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.
出版信息
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。
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