生物相容性吸附剂的开发对于控制和减少生态系统中的污染和废物积累的环境修复至关重要。生物相容性水凝胶代表一类创新的材料,主要由形成其结构框架的聚合物链单元组成。它们对水分子具有高亲和力。因此,这项研究旨在将氧化铁颗粒掺入明胶基质中以生产明胶水凝胶珠,以从水溶液中去除六价铬。合成的珠子,以其一致的尺寸而闻名,低摩擦,高比表面积,机械稳定性,和轻量级的特点,证明了它们对各种工业应用的适用性。这些水凝胶在去除六价铬离子方面的有效性通过使用FTIR等技术的全面分析得到证实,TGA,SEM,EDX,VSM,和XPS。批量实验表明,明胶基纳米复合珠在酸性条件下表现出最佳的吸附效率,铬离子的初始浓度较低,延长接触时间,和升高的温度(50-60°C)。该复合材料在pH为1时达到了99%的最大去除效率,在50°C时吸附剂剂量为0.5克,初始浓度为每升50毫克。在再生过程中使用0.7NNaOH可以达到70.5%的解吸效率,实现潜在的再利用和再生。重要的是,即使在四个解吸-再吸附循环之后,解吸效率仍然始终如一地高,有助于铬去除的经济和环境可持续性。此外,研究确定吸附过程是可行的,自发的,和吸热。这些共同的发现表明,磁性明胶水凝胶珠可以作为一种经济有效的替代吸附剂,用于从水溶液中有效去除铬离子。
The development of biocompatible adsorbents is vital for environmental remediation to control and reduce pollution and waste accumulation in ecosystems. Biocompatible hydrogels represent an innovative class of materials that are primarily composed of polymer chain units forming their structural framework. They have a high affinity for water molecules. This research thus aims to incorporate iron oxide particles into the gelatin matrix to produce gelatin hydrogel beads to remove hexavalent chromium from an aqueous solution. The synthesized beads, known for their consistent size, low friction, high specific surface area, mechanical stability, and lightweight characteristics, demonstrated their suitability for various industrial applications. The effectiveness of these hydrogels in removing hexavalent chromium ions was confirmed through a thorough analysis using techniques such as FTIR, TGA, SEM, EDX, VSM, and XPS. Batch experiments revealed that the gelatin-based nanocomposite beads exhibited optimal adsorption efficiency under acidic conditions, lower initial concentrations of chromium ions, extended contact time, and elevated temperature (50-60 °C). The composite achieved a maximum removal efficiency of 99% at pH 1, with an adsorbent dose of 0.5 g at 50 °C, and an initial concentration of 50 mg per liter. The use of 0.7 N NaOH in the regeneration process resulted in a commendable 70.5% desorption efficiency, enabling potential reuse and regeneration. Significantly, the desorption efficiency remained consistently high even after four desorption-readsorption cycles, contributing to the economic and environmental sustainability of chromium removal. Additionally, the study determined that the sorption process was feasible, spontaneous, and endothermic. These collective findings suggest that magnetic gelatin hydrogel beads could serve as a cost-effective alternative adsorbent for the efficient removal of chromium ions from aqueous solutions.