巯基化蔗渣纤维素纳米纤维用于汞（II）离子吸附。
l-Cysteine functionalized bagasse cellulose nanofibers for mercury(II) ions adsorption.
机构信息
Department of Chemistry, Himachal Pradesh University, Summer Hill, Shimla 171005, India.
Department of Chemistry, Himachal Pradesh University, Summer Hill, Shimla 171005, India.
出版信息
Int J Biol Macromol. 2018 Jun;112:728-736. doi: 10.1016/j.ijbiomac.2018.01.206. Epub 2018 Feb 6.
Presence of mercury ions in water, even in trace amounts, is a serious environmental hazard. Hence, there is imperative need to develop innovative and environmentally-friendly materials for their removal from wastewaters. In the present study, cellulose nanofibers (CNFs) extracted from bagasse was esterified with l-cysteine to yield thiol and amine functionalized green material (Cys-CNFs) for removal of Hg ions. The Cys-CNFs were well characterized by SEM, TEM, FTIR, EDS and XRD and evaluated for selective removal of Hg ions from the simulated wastewater. It was observed that Cys-CNFs adsorb Hg ions even at a very low concentration of 1.0mg/L and it exhibited a maximum adsorption capacity of 116.822mgg. Kinetic analysis of the data revealed that pseudo-second order kinetics and Langmuir isotherm were followed for adsorption of Hg ions.
水中汞离子的存在，即使是痕量的，也是一种严重的环境危害。因此，迫切需要开发创新的、环保的材料，以从废水中去除这些汞离子。在本研究中，从甘蔗渣中提取的纤维素纳米纤维（CNFs）与 L-半胱氨酸酯化，得到巯基和胺功能化的绿色材料（Cys-CNFs），用于去除 Hg 离子。Cys-CNFs 通过 SEM、TEM、FTIR、EDS 和 XRD 进行了很好的表征，并评估了其从模拟废水中选择性去除 Hg 离子的能力。结果表明，即使在 1.0mg/L 的极低浓度下，Cys-CNFs 也能吸附 Hg 离子，最大吸附容量为 116.822mgg。数据的动力学分析表明，Hg 离子的吸附遵循准二级动力学和朗缪尔等温线。
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