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.
Int J Biol Macromol. 2020 Jun 15;153:513-522. doi: 10.1016/j.ijbiomac.2020.03.015. Epub 2020 Mar 3.
A new crosslinked chitosan grafted with methyl methacrylate (M-CTS) adsorbent was synthesized via free radical polymerization for effective removal of Cu(II) ions from aqueous solution. Crosslinked chitosan (1 g) was grafted with 29.96 × 10 M methyl methacrylate in the presence of 2.63 × 10 M ammonium persulfate as initiator at 60 °C for 2 h to give grafting and yield percentages of 201% and 67%, respectively. Batch adsorption experiment was performed as a function of solution pH, initial metal ion concentration and contact time. The isotherm data were adequately described by Langmuir model, while kinetic study revealed that the pseudo-second order rate model best fitted for the experimental data. The maximum adsorption capacity for M-CTS at pH 4 was 192.31 mg g. Furthermore, the reusability of over six adsorption-desorption cycles suggested that M-CTS is a durable adsorbent and good candidate for metal ions treatment.
一种新型的接枝甲基丙烯酸甲酯的交联壳聚糖（M-CTS）吸附剂通过自由基聚合合成，用于从水溶液中有效去除 Cu(II)离子。在 60°C 下，将 2.63×10^-2 M 的过硫酸铵作为引发剂，用 1 g 交联壳聚糖接枝 29.96×10^-3 M 的甲基丙烯酸甲酯 2 小时，接枝率和产率分别为 201%和 67%。批量吸附实验作为溶液 pH 值、初始金属离子浓度和接触时间的函数进行。等温线数据被朗缪尔模型很好地描述，而动力学研究表明，伪二阶速率模型最适合实验数据。在 pH 值为 4 时，M-CTS 的最大吸附容量为 192.31 mg/g。此外，经过六次以上的吸附-解吸循环，证明 M-CTS 是一种耐用的吸附剂，是处理金属离子的良好候选材料。
