Chitosan biopolymer was extracted from chitin and utilized for the synthesis of CaNiFe₂O₄/Chitosan as a new magnetic nanocomposite. The structural and morphological properties of the synthesized samples were characterized by FT-IR, XRD, XPS, SEM, and TEM techniques. Adsorption of methylene blue (MB) was evaluated onto CaNiFe₂O₄/Chitosan nanomaterial. UV–Vis spectrophotometry was used to monitor the removal efficiency. Batch experiments were performed to research the effect of various factors including solution pH, adsorbent dosage, contact time, MB initial concentration, and temperature on the adsorption removal of MB. This study reveals that the CaNiFe₂O₄/Chitosan nanocomposite is indeed an effective, applicable, and affordable adsorbent for the removal of MB with adsorption efficiency of about 88 percent. The highest removal was recorded at 25 °C, 7.6 pH, and 100 mg of CaNiFe₂O₄/Chitosan dosage. The adsorption data validity was estimated by applying various equilibrium adsorption models and fitted by linear and non-linear regression models (kinetic and isotherm models). Thermodynamically, MB adsorption onto CaNiFe₂O₄/Chitosan nanocomposite demonstrated spontaneity and viability based on the (negative) values of ∆G and ∆H.

从几丁质中提取壳聚糖生物聚合物，并将其用于合成CaNiFe ₂ O ₄ /壳聚糖作为一种新型的磁性纳米复合材料。通过FT-IR，XRD，XPS，SEM和TEM技术对合成样品的结构和形貌特性进行了表征。在CaNiFe ₂ O ₄ /壳聚糖纳米材料上评估了亚甲基蓝（MB）的吸附。紫外可见分光光度法用于监测去除效率。进行批处理实验以研究各种因素的影响，包括溶液的pH值，吸附剂的用量，接触时间，MB的初始浓度和温度对MB吸附去除的影响。这项研究表明，CaNiFe ₂ O ₄/壳聚糖纳米复合材料确实是一种有效，适用且可负担的吸附剂，用于去除MB，吸附效率约为88％。在25°C，7.6 pH和100 mg CaNiFe ₂ O ₄ /壳聚糖剂量下记录的最高去除率。吸附数据的有效性通过应用各种平衡吸附模型估算，并通过线性和非线性回归模型（动力学模型和等温线模型）进行拟合。热力学上，MB在CaNiFe ₂ O ₄ /壳聚糖纳米复合材料上的吸附基于∆G和∆H的（负）值显示出自发性和生存能力。