Ayman K. El-Sawaf, Saly R. El-Dakkony, Mahmoud F. Mubarak, Amal A. Nassar
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引用次数: 0
摘要
本研究旨在利用从刺梨植物材料中制备的 Opuntia ficus-indica 外壳开发一种绿色、可持续的壳聚糖-活性炭纳米复合材料，并评估其去除工业废水中 Sn (II) 和 As (V) 离子的效果。该纳米复合材料是通过一种环境友好型交联方法合成的。利用傅立叶变换红外光谱、X 射线衍射和扫描电镜分析等多种技术对合成的纳米复合材料进行了表征。在不同条件下进行了吸附实验，以优化影响 Sn (II) 和 As (V) 离子去除效率的关键参数。应用吸附动力学和等温线模型进一步了解了吸附过程的机理。结果表明，去除 Sn (II)、As (V) 离子的最佳 pH 值在 4-7 之间。在 25°C 条件下，壳聚糖用量为 0.4-0.5 g.L-1 时，对 Sn (II) 的最大吸附容量为 26 mg/g，对 As (V) 的最大吸附容量为 14.7 mg.g-1。吸附动力学和等温线表明，吸附涉及单层和异质机制，遵循假二阶动力学。这种绿色合成的壳聚糖-活性炭纳米复合材料对有毒的 Sn (II)、As (V) 离子具有极佳的去除效率，为废水处理应用提供了一种可持续的解决方案。利用丰富的罂粟壳实现了符合循环经济原则的生态友好型合成方法。 图文摘要
Synergistic effect of synthesized green nanocomposite of chitosan-activated carbon thin film (ACTF)@opuntia ficus-indica shell for removal of Sn (II) and As (V) ions from aqueous solution
The purpose of this study was to develop a green and sustainable chitosan-activated carbon nanocomposite using Opuntia ficus-indica shell prepared from prickly pear plant material and evaluate its effectiveness for removing Sn (II) and As (V) ions from industrial wastewater. The nanocomposite was synthesized via an environmentally friendly crosslinking method. The synthesized nanocomposite was characterized using several techniques, including FTIR, XRD, and SEM analysis. Adsorption experiments were conducted under various conditions to optimize the key parameters affecting Sn (II), and As (V) ions removal efficiency. The Adsorption kinetic and isotherm models were applied to further understand the mechanisms of the adsorption process. The results showed that the optimal pH for Sn (II), As (V) ions removal was in the range of 4–7. The maximum adsorption capacity for Sn (II) was 26 mg/g, and for As (V) was 14.7 mg.g−1, achieved with a chitosan dose of 0.4–0.5 g.L−1 at 25°C. The adsorption kinetics and isotherms indicated that the Adsorption involves monolayer and heterogeneous mechanisms, following pseudo-second-order kinetics. This green synthesized chitosan-activated carbon nanocomposite displayed excellent removal efficiency for toxic Sn (II), As (V) ions, providing a promising sustainable solution for wastewater treatment applications. The use of abundant opuntia ficus-indica shell enabled an eco-friendly synthesis approach aligned with circular economy principles.
期刊介绍：
Cellulose is an international journal devoted to the dissemination of research and scientific and technological progress in the field of cellulose and related naturally occurring polymers. The journal is concerned with the pure and applied science of cellulose and related materials, and also with the development of relevant new technologies. This includes the chemistry, biochemistry, physics and materials science of cellulose and its sources, including wood and other biomass resources, and their derivatives. Coverage extends to the conversion of these polymers and resources into manufactured goods, such as pulp, paper, textiles, and manufactured as well natural fibers, and to the chemistry of materials used in their processing. Cellulose publishes review articles, research papers, and technical notes.
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