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本文研究了羟肟浸渍树脂吸附铜离子的很多重要方面,其中包括对金属的吸附次序,吸附铜的容量和动力学以及循环使用的可能性。我们发现金属离子的分配系数与pH有关,吸附金属的pH是随Cu~(2+),Fe~(3+),Co~(2+)和Ni~(2+)的次序而增加的。高表面积(>400m~2/g)的多孔载体和树脂中适宜的羟肟含量以及适宜的操作温度被证实具有最高的吸附容量和快的吸附的速率。我们还发现二(2—乙基已基)磷酸(P204)和渗透剂OT作为添加剂将加快吸附速度。试验了镍阳极液和氯化钴溶液中所含铜离子的净化。发现其去除效果是令人满意的。我们还发现,在循环使用过程中树脂中羟肟的损失是极少的。
In this paper, many important aspects of the adsorption of copper ions by hydroxoxime impregnated resins are studied, including the order of metal adsorption, the capacity and kinetics of copper adsorption, and the possibility of recycling. We found that the partition coefficient of metal ions is related to pH, and the pH of adsorbed metal increases with the order of Cu 2+, Fe 3+, Co 2+ and Ni 2+. The appropriate hydroxoxime content in porous carriers and resins with high surface area (> 400m ~ 2 / g) and suitable operating temperature proved to have the highest adsorption capacity and fast adsorption rate. We also found that di (2-ethylhexyl) phosphoric acid (P204) and penetrant OT as an additive will accelerate the rate of adsorption. The purification of copper ions contained in the nickel anolyte solution and the cobalt chloride solution was tested. Found that its removal effect is satisfactory. We also found that there is very little loss of hydroxoxime in the resin during recycling.