钙质磷矿石吸附Cd^(2+)离子性能的研究

Research on the Sorption of Cadmium(Ⅱ) Ion on Calcareous Phosphorite

用保康磷块岩对水溶液中镉离子的吸附试验表明 ,影响吸附效果的主要因素有 :介质的酸度、作用时间、初始Cd2 +浓度和样品用量。在 pH =6,作用时间为 15min ,初始Cd2 +浓度为 10mg/L的试验条件下 ,钙质磷块岩对镉离子的去除率可达 90 % ,去除容量为 4 .5mg(Cd2 +) /g(样品 )。磷块岩的矿物成分和结晶化学特性是影响吸附效果的主要内在因素。

The phosphorite from Baokang ores was used for sorption of aqueous cadmium(Ⅱ) ion. The experimental results shown that, in the condition of pH=6, reaction time=15min, initial Cd concentration=10mg/L, the Cadmium(Ⅱ) attenuation by Baokang calcareous phosphorite was 90% and attenuation Cd was 4.5mg/g(sample). As to the sorption of aqueous cadmium(Ⅱ) ion by phosphorite, crystal chemical characteristics and integrates of ores were major influential factors.