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

IF 8.2 2区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY ACS Applied Materials & Interfaces Pub Date : 2024-07-26 DOI:10.3390/gels10080496

Ainoa Murcia-Salvador, M. I. Rodríguez-López, José Antonio Pellicer, T. Gómez-Morte, D. Auñón-Calles, M. Yáñez-Gascón, J. P. Cerón-Carrasco, Á. Gil-Izquierdo, E. Núñez-Delicado, J. A. Gabaldón

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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 (R2 = 0.999) and fit the Temkin isotherm (R2 = 0.946), suggesting heterogeneous surface adsorption. The newly synthesized Chitosan-Fe polymeric gel demonstrated good adsorption properties and facilitated easy separation of purified water.

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开发壳聚糖多糖基磁性凝胶，用于从水中直接去除 83:1 红色素

染料造成的水污染是一个重大的环境问题，因此有必要开发适合工业用途的高效、低成本脱色方法。本研究合成了壳聚糖-锗聚合物凝胶，并对其进行了表征和测试，以去除水中的偶氮染料直接红 83:1。该聚合磁性壳聚糖采用了多种技术进行分析：场发射扫描电子显微镜（FE-SEM）显示了多孔结构，差示扫描量热法（DSC）和热重力分析（TGA）显示了热稳定性，红外分光光度法（IR）显示了铁在 C3 位置的成功配位，X 射线粉末衍射（XRD）证实了聚合物结构的结晶性质。动力学和等温线模型的最佳条件是 1 克和 pH 值为 7.0。通过动力学测试和等温线曲线研究了直接红 83:1 在壳聚糖磁性凝胶珠上的吸附行为。最大吸附容量为 17.46 mg/g（qmax）。吸附过程遵循伪二阶动力学（R2 = 0.999），并与 Temkin 等温线（R2 = 0.946）相吻合，表明表面存在异质吸附。新合成的壳聚糖-铁聚合物凝胶具有良好的吸附性能，易于分离纯水。

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来源期刊

ACS Applied Materials & Interfaces 工程技术-材料科学：综合

CiteScore

16.00

自引率

6.30%

发文量

4978

审稿时长

1.8 months

期刊介绍： ACS Applied Materials & Interfaces is a leading interdisciplinary journal that brings together chemists, engineers, physicists, and biologists to explore the development and utilization of newly-discovered materials and interfacial processes for specific applications. Our journal has experienced remarkable growth since its establishment in 2009, both in terms of the number of articles published and the impact of the research showcased. We are proud to foster a truly global community, with the majority of published articles originating from outside the United States, reflecting the rapid growth of applied research worldwide.