In this research study, the carboxymethyl chitosan/poly(pyrimidine-thiophene-amide)/Ni_0.2Zn_0.2Fe_2.6O₄ (CMC/P(PTA)/Ni_0.2Zn_0.2Fe_2.6O₄) was prepared as a novel magnetic bionanocomposite adsorbent. FE-SEM, EDX, NMR, XRD, FT-IR, and VSM techniques were applied for the analyses of the products. The adsorption behavior of the prepared bionanocomposite was investigated towards Nd⁺³, Tb⁺³, and Dy⁺³ as adsorbates. The adsorption process was evaluated considering the influence of independent parameters including pH of the solution, contact time, adsorbent dosage, initial metal ions concentration, and ionic strength. The adsorption efficiency values of 98.15, 97.6, and 99.42% were respectively obtained for Nd⁺³, Tb⁺³, and Dy⁺³ at optimum conditions of pH = 5.5, 30 mg/L of the ions, adsorbent dosage of 0.06 g, and contact time of 90 min. The data of the adsorption equilibrium of the ions were fitted well by Freundlich model. Kinetic studies showed that Nd⁺³, Tb⁺³, and Dy⁺³ adsorption followed both pseudo-second-order (PSO) and intra-particle diffusion (IPD) kinetic models. The values of ΔH^° indicated that the ions adsorption process onto the bionanocomposite was endothermic, and the ΔG^° values revealed that it was spontaneous at higher temperature. The CMC/P(PTA)/Ni_0.2Zn_0.2Fe_2.6O₄ could be regenerated by 0.2 M HNO₃ and its separation was viable utilizing a magnetic field with the saturation magnetization value of 14.88 emu/g.

在这项研究中，羧甲基壳聚糖/聚（嘧啶-噻吩-酰胺）/ Ni _0.2 Zn _0.2 Fe _2.6 O ₄（CMC / P（PTA）/ Ni _0.2 Zn _0.2 Fe _2.6 O ₄）被制备为新型的磁性纳米复合材料。吸附剂。FE-SEM，EDX，NMR，XRD，FT-IR和VSM技术用于产物分析。研究了制备的生物纳米复合材料对Nd ⁺³，Tb ⁺³和Dy ⁺³的吸附行为。作为被吸附物。考虑到包括溶液的pH，接触时间，吸附剂剂量，初始金属离子浓度和离子强度在内的独立参数的影响，评估了吸附过程。在pH = 5.5的最佳条件下，离子30 mg / L，吸附剂量为0.06 g，1.0 mg / L的条件下，Nd ⁺³，Tb ⁺³和Dy ⁺³的吸附效率分别为98.15、97.6和99.42％。和接触时间为90分钟。Freundlich模型很好地拟合了离子的吸附平衡数据。动力学研究表明Nd ⁺³，Tb ⁺³和Dy ⁺³吸附遵循伪二级（PSO）和颗粒内扩散（IPD）动力学模型。ΔH ^°的值表明离子在生物纳米复合材料上的吸附过程是吸热的，而ΔG ^°值表明其在较高温度下是自发的。CMC / P（PTA）/ Ni _0.2 Zn _0.2 Fe _2.6 O ₄可通过0.2 M HNO ₃再生，其分离可利用饱和磁化值为14.88 emu / g的磁场进行。