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用于从水中去除直接红83:1的壳聚糖多糖基磁性凝胶的研制

Development of Chitosan Polysaccharide-Based Magnetic Gel for Direct Red 83:1 Removal from Water.

作者信息

Murcia-Salvador Ainoa, Rodríguez-López María Isabel, Pellicer José Antonio, Gómez-Morte Teresa, Auñón-Calles David, Yáñez-Gascón María Josefa, Cerón-Carrasco José Pedro, Gil-Izquierdo Ángel, Núñez-Delicado Estrella, Gabaldón José Antonio

机构信息

Molecular Recognition and Encapsulation Research Group (REM), Health Sciences Department, Universidad Católica de Murcia (UCAM), Campus de los Jerónimos 135, E-30107 Guadalupe, Spain.

Centro Universitario de la Defensa, Universidad Politécnica de Cartagena, C/Coronel López Peña s/n, Base Aérea de San Javier, E-30720 Santiago de la Ribera, Spain.

出版信息

Gels. 2024 Jul 26;10(8):496. doi: 10.3390/gels10080496.

DOI:10.3390/gels10080496
PMID:39195025
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC11354028/
Abstract

Water pollution caused by dyes is a significant environmental issue, necessitating the development of effective, cost-efficient decolorization methods suitable for industrial use. In this study, a Chitosan-Fe polymeric gel was synthesized, characterized, and tested for removing the azo dye Direct Red 83:1 from water. The polymeric magnetic chitosan was analyzed using various techniques: Field Emission Scanning Electron Microscopy (FE-SEM) revealed a porous structure, Differential Scanning Calorimetry (DSC) and Thermal Gravimetric Analysis (TGA) demonstrated the thermal stability, Infrared Spectrophotometry (IR) indicated the successful coordination of iron at the C3 position, and X-ray Powder Diffraction (XRD) confirmed the crystalline nature of the polymeric structure. Optimal conditions for kinetic and isotherm models were found at 1 g and pH 7.0. Adsorption behavior of Direct Red 83:1 onto magnetic chitosan gel beads was studied through kinetic tests and isotherm curves. The maximum adsorption capacity was 17.46 mg/g (qmax). The adsorption process followed pseudo-second-order kinetics (R = 0.999) and fit the Temkin isotherm (R = 0.946), suggesting heterogeneous surface adsorption. The newly synthesized Chitosan-Fe polymeric gel demonstrated good adsorption properties and facilitated easy separation of purified water.

摘要

染料造成的水污染是一个重大的环境问题，因此需要开发适用于工业用途的有效且经济高效的脱色方法。在本研究中，合成了一种壳聚糖 - 铁聚合物凝胶，对其进行了表征，并测试了其从水中去除偶氮染料直接红83:1的能力。使用多种技术对聚合磁性壳聚糖进行了分析：场发射扫描电子显微镜（FE-SEM）显示其具有多孔结构，差示扫描量热法（DSC）和热重分析（TGA）证明了其热稳定性，红外分光光度法（IR）表明铁在C3位置成功配位，X射线粉末衍射（XRD）证实了聚合物结构的晶体性质。动力学和等温线模型的最佳条件为1 g和pH 7.0。通过动力学测试和等温线曲线研究了直接红83:1在磁性壳聚糖凝胶珠上的吸附行为。最大吸附容量为17.46 mg/g（qmax）。吸附过程遵循准二级动力学（R = 0.999），并符合Temkin等温线（R = 0.946），表明存在非均相表面吸附。新合成的壳聚糖 - 铁聚合物凝胶表现出良好的吸附性能，便于净化水的分离。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/baaa/11354028/5125f7b2ab8d/gels-10-00496-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/baaa/11354028/369b90c2e1d2/gels-10-00496-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/baaa/11354028/1ba369895921/gels-10-00496-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/baaa/11354028/3ff7618327ba/gels-10-00496-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/baaa/11354028/971d429f82ee/gels-10-00496-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/baaa/11354028/935a2b3c8a5f/gels-10-00496-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/baaa/11354028/f00a2439268f/gels-10-00496-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/baaa/11354028/8c458cf1e45f/gels-10-00496-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/baaa/11354028/843afbbc0285/gels-10-00496-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/baaa/11354028/53232ecfe1ad/gels-10-00496-g009a.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/baaa/11354028/5125f7b2ab8d/gels-10-00496-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/baaa/11354028/369b90c2e1d2/gels-10-00496-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/baaa/11354028/1ba369895921/gels-10-00496-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/baaa/11354028/3ff7618327ba/gels-10-00496-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/baaa/11354028/971d429f82ee/gels-10-00496-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/baaa/11354028/935a2b3c8a5f/gels-10-00496-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/baaa/11354028/f00a2439268f/gels-10-00496-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/baaa/11354028/8c458cf1e45f/gels-10-00496-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/baaa/11354028/843afbbc0285/gels-10-00496-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/baaa/11354028/53232ecfe1ad/gels-10-00496-g009a.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/baaa/11354028/5125f7b2ab8d/gels-10-00496-g010.jpg

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