This research incorporates iron-loaded crosslinked chitosan (CS) polymeric structure into the interlayer lattice space of Montmorillonite clay (MT) to enhance the phosphate adsorption capacity of MT. The synthesized Fe-loaded crosslinked chitosan montmorillonite composite (Fe-CS-MT) is evaluated effectively for phosphate removal from aqueous media. Batch adsorption experiments optimized the influence of adsorption parameters, i.e., contact time (50 min), solution pH (3), and adsorbent dosage (2 g L⁻¹) for phosphate removal. The experimental results of equilibrium and kinetic studies indicated that phosphate adsorption on Fe-CS-MT follows Pseudo-second-order kinetic and Freundlich isotherm models with a high degree of accuracy. A series of analytical tools used to profile the investigated material's surface features involves CHNS Analyser, SEM-EDX, FTIR, XRD, XRF, UV-Visible Spectrophotometer, TGA, DSC, and surface analysis. The calculations of the thermodynamic study confirmed the endothermic and spontaneous nature of the phosphate adsorption process. This study presents an eco-friendly adsorbent tested in natural conditions to assess the feasibility of removing phosphate from an aqueous phase.

本研究将载铁交联壳聚糖 (CS) 聚合物结构纳入蒙脱石粘土 (MT) 的层间晶格空间，以提高 MT 的磷酸盐吸附能力。合成的负载 Fe 的交联壳聚糖蒙脱石复合材料 (Fe-CS-MT) 被有效评估从水性介质中去除磷酸盐。批量吸附实验优化了吸附参数的影响，即接触时间（50 分钟）、溶液 pH 值（3）和吸附剂用量（2 g L ^-1) 去除磷酸盐。平衡和动力学研究的实验结果表明，磷酸盐在 Fe-CS-MT 上的吸附遵循伪二级动力学和 Freundlich 等温线模型，具有很高的准确性。用于分析所研究材料表面特征的一系列分析工具包括 CHNS 分析仪、SEM-EDX、FTIR、XRD、XRF、紫外-可见分光光度计、TGA、DSC 和表面分析。热力学研究的计算证实了磷酸盐吸附过程的吸热和自发性质。本研究提出了一种在自然条件下测试的环保吸附剂，以评估从水相中去除磷酸盐的可行性。