果胶对稀土金属镨(Ⅲ)的吸附研究

Study on the adsorption of rare earth metal Praseodymium(Ⅲ) by pectin

研究了低脂果胶对稀土金属镨(Ⅲ)的吸附,考察了吸附时间、吸附溶液的pH值、吸附温度、吸附剂果胶的用量、镨(Ⅲ)离子的浓度对果胶吸附镨(Ⅲ)的吸附容量的影响。对吸附前后的果胶做了红外光谱分析。结果表明:最佳的吸附时间为60min,pH值为2.0,吸附温度为45℃,吸附剂用量为0.01g,镨(Ⅲ)离子的浓度为5.0μg·m L^-1。在合适条件下,果胶对镨(Ⅲ)的吸附容量达到19.975 mg·g^-1,吸附后果胶与Pr发生了反应。

The adsorption of rare earth metal praseodymium(Ⅲ) by low-fat pectin was studied. Effects of adsorption time, p H of the solution, adsorption temperature, the dosage of pectin, and the concentration of praseodymium(Ⅲ) ion on adsorption capacity of pectin were investigated. Infrared spectroscopy was used to analyze the samples before and after adsorption. The results indicate that the optimal adsorption time, pH value, adsorption temperature, dosage of pectin, concentration of praseodymium(Ⅲ) ion is 60 min, 2.0, 45℃, 0.01 g, and5.0μg·m L^-1, respectively. Under a suitable condition, the adsorption capacity of pectin to praseodymium(Ⅲ) reaches 19.975 mg·g^-1. Pectin reacts with Pr3+after the adsorption.