A thiourea-modified weak base anion exchange resin, ZGA451 (thiourea@ZGA451), was prepared. Thiourea@ZGA451 exhibited excellent potential for Au(III) adsorption. The maximum adsorption capacity of Au(III) by thiourea@ZGA451 was 995.6 mg/g at 298 K. The adsorption process followed the Freundlich and pseudo-second-order models, which are monolayer and chemisorption adsorption, respectively. The adsorption mechanism of Au(III) on thiourea@ZGA451 involves electrostatic attraction, chelation, and redox. Thermodynamic experiments showed that the reaction exhibited spontaneous endothermic behavior. Thus, thiourea@ZGA451 possesses outstanding Au(III) adsorption properties.

制备了硫脲改性弱碱阴离子交换树脂ZGA451（硫脲@ZGA451）。硫脲@ZGA451 表现出优异的 Au(III) 吸附潜力。硫脲@ZGA451在298 K时对Au(III)的最大吸附量为995.6 mg/g。吸附过程遵循Freundlich和准二级模型，分别为单层吸附和化学吸附。Au(III)在硫脲@ZGA451上的吸附机理包括静电吸引、螯合和氧化还原。热力学实验表明该反应表现出自发的吸热行为。因此，硫脲@ZGA451具有出色的Au(III)吸附性能。