Effective Removal of Aqueous Cu(II) Pollution by a Novel Readily Prepared Porous Biomaterial Using Crab Shell Wastes
Effective Removal of Aqueous Cu(II) Pollution by a Novel Readily Prepared Porous Biomaterial Using Crab Shell Wastes
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利用蟹壳废物制备新型多孔生物材料有效去除水中铜（II）污染
DOI：
10.1007/s11270-023-06249-0
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发表时间：
2023
期刊：
影响因子：
--
通讯作者：
Jun
中科院分区：
文献类型：
--
作者：
Yafeng Ge;Liang Zhang;Yong Zhang;Jia;Hui Gao;Shiquan Li;Jun
利用甲壳类废弃物制备甲壳素/壳聚糖生物吸附剂因其在废弃物回收利用和环境修复方面具有广阔的应用前景而受到越来越多的关注。然而，传统的酸碱处理甲壳素从原料到最终的生物吸附剂，工艺复杂，二次污染严重。本工作以三疣梭子贝为原料，通过一步法合成了一种新型的EDTA接枝甲壳素(ECH)。得到的生物材料具有三维多孔结构和额外的官能团，对铜(II)的吸附具有优异的吸附效率和重复使用性能。铜(II)的去除效率最高可达99.4%，相应的吸附容量可达223.70 mg/g−1。吸附数据符合朗缪尔等温式，符合准一级和准二级动力学模型。进一步研究表明，ECH对铜(II)的吸附机理应为形成EDTA-甲壳素-铜络合物。这些发现将有助于以甲壳类废弃物为原料，以更简便、更绿色的方式开发更新颖的甲壳素生物吸附材料，并将其应用于环境修复。
Using crustacean shell wastes to produce chitin/chitosan-based biosorbents has gained increasing attention because of its promising potential for waste recycling and environmental remediation. However, from raw materials to final biosorbents, the traditional acid-alkaline-treated chitin suffered from complicated procedures and serious secondary pollution. In this work, via an integrating one-step environmental-friendly procedure, a novel EDTA-grafted chitin (ECH) was successfully prepared usingPortunus trituberculatashells. The obtained biomaterial possessed a three-dimensional porous microstructure and extra functional groups, and showed exceptional adsorption efficiency and reusability for Cu(II) adsorption. The highest Cu(II) removal rate reached 99.4%, while the corresponding adsorption capacity reached 223.70 mg g−1. Moreover, the adsorption data followed better with the Langmuir isotherm model, while it fitted well with both the pseudo-first-order model and the pseudo-second-order kinetics model. Further study suggested that the adsorption mechanisms of Cu(II) by the ECH should be a formation of EDTA–chitin–Cu complex. These findings would enlighten the development of more novel chitin-based biosorbents using crustacean shell wastes via more facile and green ways, as well as their application as biosorbents for environmental restoration.