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研究了Ｎ５０３（Ｎ，Ｎ二仲辛基乙酰胺）萃淋树脂在氢溴酸、硫酸－溴化钠体系中对镉的吸附性能。探讨了Ｎ５０３萃淋树脂在氢溴酸体系中吸附镉的动力学和机理，发现Ｎ５０３萃淋树脂吸附镉的反应按拟一级反应进行，并符合Ｆｒｅｕｎｄｌｉｃｈ等温吸附式。由斜率法和饱和容量法确定Ｎ５０３萃淋树脂吸附镉的反应，镉以ＣｄＢｒ－３形式吸附在Ｎ５０３萃淋树脂上，镉与Ｎ５０３的摩尔比为１∶３。
The adsorption properties of N503 (N, N-di-sec-octylacetamide) extraction resin on cadmium in hydrobromic acid and sulfuric acid-sodium bromide systems were studied. The kinetics and mechanism of adsorption of cadmium by N503 levitation resin in hydrobromic acid system were investigated. It was found that the adsorption of cadmium by N503 levitation resin proceeded as first order reaction and was in accordance with the Freundlich adsorption isotherm. The adsorption of cadmium by N503 extraction resin was determined by slope method and saturation capacity method. Cadmium was adsorbed on N503 extraction resin by CdBr-3. The molar ratio of cadmium to N503 was 1: 3.