海藻吸附水中铀离子初步研究

Study of Algae's Adsorption to Uranium Ion in Water Solution

在不同pH、不同铀离子浓度、不同温度及添加其他金属离子的铀溶液中,对铀离子在海藻上的吸附效率进行初步研究,同时考察溶液中一些共存金属离子对海藻吸附铀离子效率的影响。研究结果表明：pH为5～8时,烟台红藻和海菠菜受pH影响较小,吸附容量约为1.40μg/g;海木耳吸附能力受pH影响较大,吸附容量在1.03～2.23μg/g范围内波动;海藻的吸附效率及吸附容量与铀离子浓度有关,最大分别达到95.8%和65.4μg/g;在24 h内,吸附过程是一不依赖温度的过程;实验中所用的金属离子对烟台红藻的铀吸附能力的影响程度在不同的时间段有所不同。

The adsorption efficiencies of the algae to uranium ion were determined at various pH, uranium ion concentrations, adsorption temperatures and the species of coexisted metal ions, and the effect of coexisted metal ion on the adsorption efficiency was researched. The experimental results at pH= 5-8 are as follows：1） the adsorption capacity is a constant to be about 1.40μg/g for the Yantai red alga and the sea spinach, and is changeable in the range of 1.03-2.23μg/g with pH for the sea edible fungus; 2） for the algae the adsorption efficiency and adsorption capacity are related to uranium ion concentration, and the maximum adsorption efficiency and capacity is 95.8% and 65.4 μg/g, respectively; 3） the adsorption process for 24 h is not dependent on the temperature; 4） the effect of the species of coexisted metal ions on the adsorption capacity of uranium ion is various with the time during adsorption process.