In this study, zirconium(IV)-chitosan (Zr-CTS) hydrogel beads were synthesized for boron(III) removal. Zr-CTS was characterized by a series of experimental techniques, including SEM, XRD and FTIR. Kinetic, isotherm, and thermodynamic investigations were employed to understand the adsorption behavior. It was found that boron removal is a pH-dependent process, having the highest performance at pH 6–7. It was also shown that the process of boron adsorption follows the pseudo-second-order kinetic model and is dependent on Zr(IV) content in hydrogel beads, achieving the maximum adsorption capacity of 24.5 mg/g. Thermodynamic constants demonstrated a feasible, spontaneous, and endothermic adsorption. Boron removal by Zr-CTS was found to occur through the adsorption of boron species on the surface of amorphous zirconium hydroxide via complexation mechanism. The results indicated that due to its efficiency in removing boron, good regeneration capacity and convenient form, Zr-CTS might be considered as a promising adsorbent for water purification.

在这项研究中，锆（IV）-壳聚糖（Zr-CTS）水凝胶珠被合成用于去除硼（III）。Zr-CTS通过一系列实验技术进行了表征，包括SEM，XRD和FTIR。动力学，等温线和热力学研究被用来了解吸附行为。发现除硼是一个pH依赖的过程，在pH 6-7时具有最高的性能。还表明，硼吸附过程遵循拟二级动力学模型，并取决于水凝胶珠粒中Zr（IV）的含量，最大吸附容量为24.5 mg / g。热力学常数表明可行，自发和吸热吸附。发现Zr-CTS脱硼是通过络合机理将硼吸附在非晶态氢氧化锆表面上而发生的。结果表明，由于Zr-CTS的除硼效率高，再生能力好，形态方便，可以作为一种有希望的净水吸附剂。