Fixed-bed column study for deep removal of copper(Ⅱ) from simulated cobalt electrolyte using polystyrene-supported 2-aminomethylpyridine chelating resin

模拟氯化钴电解液深度除铜用聚氯乙烯基2-氨甲基吡啶螯合树脂的动态吸附研究（英文）

This study presents the deep removal of copper (Ⅱ) from the simulated cobalt electrolyte using fabricated polystyrene-supported 2-aminomethylpyridine chelating resin (PS-AMP) in a fixed-bed.The effects of bed height (7.0–14.0 cm),feed flow rate (4.5–9.0 mL/min),initial copper (Ⅱ) concentration of the feed (250–1000 mg/L),feed temperature (25–40 ℃) and the value of pH (2.0–4.0) on the adsorption process of the PS-AMP resin were investigated.The experimental data showed that the PS-AMP resin can deeply eliminate copper (Ⅱ) from the simulated cobalt electrolyte.The bed height,feed flow rate,initial copper (Ⅱ) concentration of the feed,feed temperature and feed pH value which corresponded to the highest removal of copper (Ⅱ) were 7.0 cm with 35 mm of the column diameter,4.5 mL/min,40℃,1000 mg/L and 4.0,respectively.The breakthrough capacity,the saturated capacity of the column and the mass ratio of Cu/Co (g/g) in the saturated resin were correspondingly 16.51 mg/g dry resin,61.72 mg/g dry resin and 37.67 under the optimal experimental conditions.The copper (Ⅱ) breakthrough curves were fitted by the empirical models of Thomas,Yoon-Nelson and Adam-Bohart,respectively.The Thomas model was found to be the most suitable one for predicting how the concentration of copper (Ⅱ) in the effluent changes with the adsorption time.

介绍了在固定床中使用自制聚苯乙烯基2-氨基甲基吡啶螯合树脂(PS-AMP)从模拟钴电解液中深度去除铜(Ⅱ)的研究。研究了床高(7.0~14.0cm),进料流速(4.5~9.0mL/min),初始铜(Ⅱ)浓度(250~1000mg/L),料液温度(25~40℃)和pH值(2.0~4.0)对PS-AMP树脂吸附过程的影响。实验数据表明,PS-AMP树脂可以从模拟钴电解液中深度除铜(Ⅱ)。选用玻璃柱直径为35mm时,去除铜的最佳床高,进料流速,料液初始铜(Ⅱ)浓度,料液温度和pH值分别为7.0cm,4.5mL/min,1000mg/L,40℃和4.0。在最佳实验条件下,穿透容量,饱和容量和饱和树脂中Cu/Co(g/g)的质量比相应地为16.51mg/g干树脂,61.72mg/g干树脂和37.67。铜(Ⅱ)穿透曲线分别由Thomas模型,Yoon-Nelson模型和Adam-Bohart模型拟合。Thomas模型是最适合预测流出物中铜(Ⅱ)浓度如何随吸附时间变化的模型。