离子交换树脂酸解析回收氨浸液中镍钴的工艺与机理研究
Journal: Ecological Environment and Protection DOI: 10.32629/eep.v9i1.3018
Abstract
本研究系统考察了酸解析法从饱和离子交换树脂中回收氨浸液镍、钴的工艺参数及机理。通过对比盐酸、硫酸、硝酸、草酸和醋酸的解析性能,筛选出最优解析剂；重点研究了酸浓度、液固比、反应时间等因素对解析效率的影响规律,并深入探讨了解析动力学机制与树脂再生循环性能。结果表明：盐酸(HCl)为最优解析剂,在浓度1.0 mol/L、液固比20 mL/g、25℃、250 r/min条件下解析180 min,Ni²⁺和Co²⁺解析率分别达96.5%和94.8%。解析过程符合准二级动力学模型(R²>0.999),速率控制步骤为化学脱附反应。树脂经3次"吸附-解析"循环后,吸附量保留率>94%,解析率下降幅度<4%,展现出良好的再生稳定性与工业化应用前景。本研究为树脂法回收氨浸液中镍、钴提供了关键工艺参数与理论支撑。
Keywords
镍钴回收；氨浸液；离子交换树脂；酸解析；动力学；树脂再生
Funding
重庆市教育委员会科学技术研究项目(项目编号：KJQN202301327),基于金属M-F配位的氟吸附剂的制备及其除氟性能研究；重庆市自然科学基金项目-面上项目(项目编号：CSTB2024NSCQ-MSX0519),基于配体交换的树脂基Al纳米复合材料的制备及其深度除氟性能研究。
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