The study involved the synthesis of a novel adsorbent via the direct carbonylation of butane-1,4-dioic acid impregnated Alhagi root powder to its acid anhydride analogue and the subsequent esterification of the highly cellulosic plant material by the anhydride to an ester of high carboxyl content. The high carboxyl content of the synthesized adsorbent was recorded as 451.76 m.eq –COOH/100 g sample. The adsorbent was effectively characterized using Scanning electron microscopy, Energy dispersion X-ray, and Fourier-transform infrared spectroscopy, as well as utilized for aqueous cobalt ion sequestration. Similarly, the effect of the process variable on the carboxyl content and adsorption capacity of ‘ATAG’ was elucidated. The Dubinin–Radushkevich model satisfactorily predicted the isotherm data. Meanwhile, the intraparticle diffusion model was best at predicting the kinetic data at adsorbate concentration of 300 and 450 mg/L, while the pseudo-first-order model emerged as the best fit at 600 mg/L concentration. The maximum adsorption capacity of 188.67 mg/g was recorded at optimum adsorption conditions (pH 6.0, 60 min, and 30 °C), and the adsorption mechanism was also proposed. The abundant surface oxygenous functional groups on ‘ATAG’ positively influenced its adsorption capacity; thus, making it a promising biosorbent for aqueous Co (II) uptake.

该研究涉及一种合成新的吸附剂的方法，该方法是将浸渍有1,4-丁二酸的Alhagi根粉直接羰基化为其酸酐类似物，然后将高纤维素植物材料通过酸酐酯化为高羧基酯。内容。合成吸附剂的高羧基含量记录为451.76 m.eq –COOH / 100 g样品。使用扫描电子显微镜，能量色散X射线和傅立叶变换红外光谱对吸附剂进行了有效表征，并用于钴离子螯合。类似地，阐明了工艺变量对'ATAG'的羧基含量和吸附容量的影响。Dubinin–Radushkevich模型可以令人满意地预测等温线数据。同时，颗粒内扩散模型最适合预测吸附剂浓度为300和450 mg / L时的动力学数据，而伪一级方程式最适合于600 mg / L浓度时的动力学拟合。在最佳吸附条件（pH 6.0、60 min和30°C）下记录的最大吸附容量为188.67 mg / g，并提出了吸附机理。“ ATAG”上丰富的表面含氧官能团对其吸附能力产生积极影响。因此，使它成为吸收Co（II）水溶液的有前途的生物吸附剂。并提出了吸附机理。“ ATAG”上丰富的表面含氧官能团对其吸附能力产生积极影响。因此，使它成为吸收Co（II）水溶液的有前途的生物吸附剂。并提出了吸附机理。“ ATAG”上丰富的表面含氧官能团对其吸附能力产生积极影响。因此，使它成为吸收Co（II）水溶液的有前途的生物吸附剂。