绿茶对金(Ⅲ)、锗(Ⅳ)离子捕集性能的研究

Study on catching of gold and germanium ions by green-tea

以绿茶做捕集剂 ,对水溶液中的金 (Ⅲ )、锗 (Ⅳ )两种离子进行了捕集性能的研究。实验结果表明 ,绿茶在pH 5～ 7和pH 6～ 7时 ,对金 (Ⅲ )、锗 (Ⅳ )两种离子的捕集率分别可达 97%和 96%以上 ,金 (Ⅲ )、锗 (Ⅳ )的捕集容量分别为7 6mg/g和 5 7mg/g。捕集后的金属离子可分别用 1 0g/L亚硫酸钠溶液和 5mol/L盐酸进行洗脱。

The catching of Au(Ⅲ) and Ge(Ⅳ) from solution by green tea was studied. In the optimal condition, the catching rate and quantity of Au(Ⅲ) was found to be 97% and 7.6mg/g, respectively, while those of Ge(Ⅳ) was found to be 96% and 5.7 mg/g, respectively. Au(Ⅲ) and Ge(Ⅳ) absorbed on the tea could be eluted by 10 g/L Na 2SO 3 solution and 5 mol/L HCl. The tea could be recovered after eluting.