棉基纤维吸附剂的制备及其对重金属离子的去除。
Preparation of cotton-based fibrous adsorbents for the removal of heavy metal ions.
机构信息
Department of Building Environment and Energy Engineering, Guilin university of aerospace technology, Guilin 541004, China; School of Resources, Environment and Materials, GuangXi University, Nanning 530004, China.
Department of Building Environment and Energy Engineering, Guilin university of aerospace technology, Guilin 541004, China.
出版信息
Carbohydr Polym. 2019 Dec 1;225:115218. doi: 10.1016/j.carbpol.2019.115218. Epub 2019 Aug 20.
Cotton fiber functionalized with tetraethylenepentamine and chitosan (CTPC) was prepared and used as absorbents for the removal of Cu(II), Pb(II) and Cr(III) ions from aqueous solution. The functionalized materials (CTPC) were characterized by SEM/EDX, FTIR, BET and XRD to confirm the characterization and structural changes of fibers before and after the modifying process. The adsorption performance of CTPC was investigated with different pH, contact time and initial concentration of three kinds of metal ions. Results showed that the maximum adsorption capacity was 81.97 mg g for Cu(II), 123.46 mg g for Pb(II) and 72.99 mg g for Cr(III) based on the Langmuir isotherm model at optimal pH (5.0). Adsorption kinetics of CTPC fibers for Cu(II), Pb(II), and Cr(III) ions followed the pseudo-second-order model. The adsorption-desorption experiments demonstrated that CTPC showed better stability, and CTPC would be an effective and practical material for the treatment and recycling of heavy metal ions in the wastewater.
用四乙烯五胺和壳聚糖（CTPC）功能化棉花纤维，将其用作从水溶液中去除 Cu(II)、Pb(II) 和 Cr(III)离子的吸附剂。通过 SEM/EDX、FTIR、BET 和 XRD 对功能化材料（CTPC）进行了表征，以确认纤维在修饰前后的特征和结构变化。通过不同的 pH 值、接触时间和三种金属离子的初始浓度研究了 CTPC 的吸附性能。结果表明，在最佳 pH 值（5.0）下，基于 Langmuir 等温模型，CTPC 对 Cu(II)、Pb(II) 和 Cr(III)的最大吸附容量分别为 81.97 mg g、123.46 mg g 和 72.99 mg g。CTPC 纤维对 Cu(II)、Pb(II) 和 Cr(III)离子的吸附动力学符合拟二级模型。吸附-解吸实验表明，CTPC 表现出更好的稳定性，CTPC 将是处理和回收废水中重金属离子的一种有效且实用的材料。
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