A novel biosorbent yttrium/sodium alginate (Y/SA) hydrogel was prepared by the crosslinking of sodium alginate (SA) and yttrium (Y) ions and characterized by Scanning Electron Microscopy (SEM) and Energy Dispersive Spectroscopy (EDS), X-ray Diffraction (XRD), Fourier Transform-Infrared (FTIR), UV visible diffuse reflectance spectroscopy (UV–Vis DRS) and Thermogravimetric Analysis (TGA), respectively. The important parameters affecting the adsorption of Congo Red (CR) and Weak Acid Brilliant Blue RAW (WABB RAW) onto Y/SA were investigated systematically, respectively. The results show that Y/SA gel beads have super-strong adsorption performance for CR and WABB RAW dyes in a wide pH range of 2.0–10.0. The equilibrium data fitted by Langmuir and Freundlich models were found to completely follow Langmuir model where the obtained maximum adsorption capacities of 1567 and 1087 mg/g for CR and WABB RAW were very close to the experimental adsorption capacities, respectively, showing the adsorption of monomolecular layer. The adsorption kinetic data of two dyes by Y/SA fully accorded with the pseudo-second-order rate equation and adsorption processes were mainly controlled by intraparticle diffusion. The results of thermodynamic study indicate the feasible, spontaneous and exothermic nature of adsorption reaction. The further study revealed that electrostatic adsorption, hydrogen bonding and ion exchange reaction were the predominant adsorption for dye removal from aqueous solution by Y/SA gel beads. As a highly efficient, green and conducive to solid–liquid separation biosorbent, Y/SA hydrogel has great potential-application prospects for the purification of high-concentration dyestuff effluent.

通过海藻酸钠（SA）和钇（Y）离子交联制备了新型生物吸附剂钇/海藻酸钠（Y / SA）水凝胶，并通过扫描电子显微镜（SEM）和能量分散光谱（EDS），X射线进行了表征衍射（XRD），傅立叶红外光谱（FTIR），紫外可见漫反射光谱（UV-Vis DRS）和热重分析（TGA）。分别系统地研究了影响刚果红（CR）和弱酸性亮蓝RAW（WABB RAW）吸附在Y / SA上的重要参数。结果表明，Y / SA凝胶珠在2.0-10.0的宽pH范围内对CR和WABB RAW染料具有超强的吸附性能。发现Langmuir和Freundlich模型拟合的平衡数据完全遵循Langmuir模型，其中对CR和WABB RAW的最大吸附容量分别为1567和1087 mg / g，非常接近实验吸附容量，表明对单分子的吸附层。Y / SA对两种染料的吸附动力学数据完全符合拟二级速率方程，吸附过程主要受颗粒内扩散控制。热力学研究结果表明吸附反应是可行的，自发的和放热的。进一步的研究表明，静电吸附，氢键和离子交换反应是Y / SA凝胶珠去除水溶液中染料的主要吸附方法。作为高效的