A novel biosorbent (‘Manna_COOH’) was synthesized via dual reaction stages of direct carbonylation of hydroxyl groups of richly cellulosic manna root powder and subsequent esterification of the resultant anhydride analogue into an ester of high carboxyl content. Both the biosorbent precursor and the 2,3-dihydroxybutanedioic acid sustain complementary features that ensured their efficient complexation. The biosorbent depicted a carboxyl content of 412.36 m.eq −COOH/100 g sample and was characterized using scanning electron microscopy (SEM), X-ray diffraction (XRD), and Fourier-transform infrared spectroscopy (FTIR). The study further evaluated the cobalt ion adsorption capacity of the synthesized ‘Manna_COOH’ under the effect of some process variable via batch mode. The Freundlich and pseudo-second-order models emerged as the best fit for the equilibrium and kinetic data, respectively. The rich oxygen-based surface functional groups entrenched on the ‘Manna_COOH’ sequel to its functionalization played a major role in making it a promising biosorbent for aqueous Co (II) uptake.

通过将富含纤维素的甘露根粉末的羟基直接羰基化和随后将所得酸酐类似物酯化成高羧基含量的酯的双重反应阶段，合成了一种新型生物吸附剂（' Manna_COOH '）。生物吸附剂前体和 2,3-二羟基丁二酸都具有互补特性，确保了它们的有效络合。生物吸附剂描绘了 412.36 m.eq -COOH/100 g 样品的羧基含量，并使用扫描电子显微镜 (SEM)、X 射线衍射 (XRD) 和傅里叶变换红外光谱 (FTIR) 进行表征。该研究进一步评估了合成的' Manna_COOH的钴离子吸附能力' 通过批处理模式在某些过程变量的影响下。Freundlich 和伪二阶模型分别成为平衡和动力学数据的最佳拟合。丰富的基于氧的表面官能团根植于其功能化的“ Manna_COOH ”后遗症，在使其成为一种有前途的 Co (II) 水溶液吸收的生物吸附剂方面发挥了重要作用。