文献类型：期刊文献

英文题名：Adsorption of gallium from bauxite Bayer liquor using acrylonitrile–Divinylbenzene–Amidoxime resin and deactivation after multiple cycles due to aluminum hydroxide layer

作者：Xie, Jiangqin Qin, Qingdong Sheng, Ailin Shi, Haolan Yin, Hongxia Zheng, Kai Xie, Lilan Liu, Wei Li, Yang

第一作者：Xie, Jiangqin

机构：[1] School of Materials and Energy Engineering, Guizhou Institute of Technology, Guiyang, 550003, China; [2] School of Materials and Architectural Engineering, Guizhou Normal University, Guiyang, 550025, China

第一机构：贵州理工学院

通信机构：School of Materials and Energy Engineering, Guizhou Institute of Technology, Guiyang, 550003, China|贵州理工学院;

年份：2026

卷号：243

外文期刊名：Hydrometallurgy

收录：EI(收录号：20261920673959)

语种：英文

外文关键词：Adsorption - Bauxite deposits - Environmental technology - Recovery - Suspensions (fluids)

摘要：In recent years, the rapid development of high-tech industries including semiconductors and new energy has boosted the demand for gallium (Ga), a critical strategic metal. Bayer liquor derived from bauxite processing is the major primary source of Ga. Given increasing resource scarcity and environmental restrictions, developing efficient and eco-friendly Ga recovery technologies has attracted extensive interest. In this study, an acrylonitrile–divinylbenzene (AN–DVB) resin was synthesized via suspension polymerization and further amidoxime (AO)-functionalized with hydroxylamine hydrochloride to obtain AN–DVB–AO resin. Adsorption–desorption behavior and deactivation mechanism of the resin were systematically investigated in real bauxite Bayer liquor. Results demonstrated that the AN–DVB–AO resin exhibited high selectivity for Ga. The maximum adsorption capacity reached 13.1 mg/g after 12 h of amidoximation. After 14 reuse cycles, the Ga adsorption capacity decreased to 6.22 mg/g, representing 52.6% reduction. The primary reason for resin deactivation was the formation of a dense aluminum hydroxide (Al(OH)3) layer after multiple cycles, which blocked active sites and degraded selective Ga adsorption. The aluminum (Al) content on the resin surface increased by 42.7% after 14 cycles, confirming that Al precipitation was the dominant cause of deactivation. The adsorption mechanism was clarified, providing a theoretical basis and technical support for practical Ga recovery from Bayer liquor using AO-modified resin. ? 2026 Elsevier B.V.