The recovery of gold from secondary resources has significant implications for both the environment and the economy. In this paper, using four types of polyphenols including 4,4′-oxydiphenol, 4,4′-methylenebisphenol, 4,4′-thiodbisphenol, and 2,2′,4,4′-tetrahydroxybenzophenone as the organic ligand and Cr(NO₃)₃·9H₂O as the metal center, four kinds of amorphous coordination polymers (aCPs), namely Cr-ODP, Cr-MBP, Cr-TDP, and Cr-TDBP were directly synthesized by solvothermal method. Each of the four aCPs exhibits remarkable selectivity and reusability for Au(III) adsorption. The adsorption processes of Au(III) adsorption by the four aCPs are spontaneous, endothermic and entropy increasing. All of the adsorption kinetics follows the pseudo-second-order model, and the adsorption isotherms fit well with Redlich-Peterson isotherm model. Cr-TDBP has faster adsorption rate than the other three aCPs, and only needs 8 min to completely adsorb Au(III) at 12 mg/L. The adsorption capacities of Cr-ODP, Cr-MBP, Cr-TDP and Cr-TDBP at 298 K are up to 1943 mg/g, 2015 mg/g, 1807 mg/g, and 2046 mg/g, respectively. At 328 K, the adsorption uptake of Cr-TDBP could be increased significantly to 3455 mg/g. The excellent adsorption performance of the four aCPs mainly are attributed to their abundant phenolic hydroxyl group, which could act as active sites for adsorbing Au(III) through a redox reaction.

从二次资源中回收黄金对环境和经济都有重大影响。本文以4,4'-氧联苯酚、4,4'-亚甲基双酚、4,4'-硫代双酚和2,2',4,4'-四羟基二苯甲酮四种多酚为有机配体，Cr(以NO ₃ ) ₃ ·9H ₂ O为金属中心，采用溶剂热法直接合成了Cr-ODP、Cr-MBP、Cr-TDP和Cr-TDBP四种非晶态配位聚合物(aCPs)。四种 aCP 均对 Au(III) 吸附表现出卓越的选择性和可重复使用性。四种aCP对Au(III)的吸附过程是自发的、吸热的和熵增的。所有吸附动力学均遵循准二阶模型，吸附等温线与Redlich-Peterson等温线模型吻合良好。Cr-TDBP比其他三种aCP具有更快的吸附速率，仅需要8 min即可完全吸附12 mg/L的Au(III)。Cr-ODP、Cr-MBP、Cr-TDP和Cr-TDBP在298 K下的吸附容量分别高达1943 mg/g、2015 mg/g、1807 mg/g和2046 mg/g。在328 K时，Cr-TDBP的吸附量可显着增加至3455 mg/g。四种aCP的优异吸附性能主要归因于其丰富的酚羟基，可以作为通过氧化还原反应吸附Au(III)的活性位点。