The need for a viable and sustainable environment has triggered the increased preference for eco-friendly agro-based biosorbents to synthetic ones. In this study, a superabsorbent hydrogel (‘c-hydrogel’) synthesized from a renewable agro-based precursor via polyacrylonitrile (PAN) graft copolymerization and subsequent hydrolysis was utilized for aqueous lead [Pb(II)] uptake. The chemical structure (using Fourier transform infrared spectroscopy, FTIR equipment), surface morphology (using scanning electron microscopy, SEM equipment) and the physicochemical properties of the synthesized ‘c-hydrogel’ were investigated. Similarly, the effect of some process variables on the biosorbents’ adsorption capacity, as well as the process equilibrium and kinetics modelling, was also undertaken in the study. The isotherm data were best fitted to the Langmuir and Temkin model, with a maximum adsorption capacity of 264.37 mg/g and fast kinetics of 40 min at pH 5.0. Conversely, the kinetic data were well fitted to the pseudo-first-order model. The ‘c-hydrogel’ showed a high water absorbency of 550 g water/g ‘c-hydrogel’ and demonstrated effectiveness, as a renewable and eco-friendly biosorbent for the aqueous lead ion [Pb (II)] removal.

对可行和可持续环境的需求引发了对生态友好型农业生物吸附剂的偏好，而不是合成吸附剂。在这项研究中，通过聚丙烯腈 (PAN) 接枝共聚和随后的水解由可再生的农业基前体合成的超吸收性水凝胶 ( “c-水凝胶” ) 用于水性铅 [Pb(II)] 的吸收。合成的“c-水凝胶”的化学结构（使用傅里叶变换红外光谱、FTIR 设备）、表面形态（使用扫描电子显微镜、SEM 设备）和理化性质被调查。同样，研究中还进行了一些工艺变量对生物吸附剂吸附能力的影响，以及工艺平衡和动力学建模。等温线数据最符合 Langmuir 和 Temkin 模型，最大吸附容量为 264.37 mg/g，在 pH 5.0 时快速动力学为 40 分钟。相反，动力学数据很好地拟合了伪一级模型。“c-水凝胶”显示出 550 克水/克“c-水凝胶”的高吸水率，并且作为一种可再生和环保的生物吸附剂用于去除水性铅离子 [Pb (II)]，证明了其有效性。