论文部分内容阅读
用静态平衡批试法和放射性示踪技术研究了Cs+ 和Yb3 + 共存条件下 ,在方解石、高岭石、蒙脱石、绿泥石和海绿石等 5种矿物上的吸附行为。结果表明 ,在相同实验条件下 (液相初始酸度、液固相比和金属离子初始浓度 ) ,按单位质量矿物的吸附量计 ,蒙脱石对Cs+ 和Yb3 + 的吸附能力明显强于其它矿物 ,而其它矿物对Cs+的吸附能力的差异相对不大。Cs+ 和Yb3 + 的吸附率 ,均随金属离子初始浓度的增大呈现减小趋势 ,但Yb3 + 的变化趋势更大。所有吸附等温线均符合Freundlich等温式方程。在实验所用溶液酸度条件下 ,Cs+ ,Yb3 + 在高岭石、蒙脱石和绿泥石中的吸附作用有可能以离子交换反应为主。
The static equilibrium batch test and radioactive tracing technique were used to study the adsorption behavior of five minerals such as calcite, kaolinite, montmorillonite, chlorite and glauconite under the co-existence of Cs + and Yb3 +. The results show that the adsorption capacity of montmorillonite to Cs + and Yb3 + is obviously higher than that of other minerals under the same experimental conditions (initial liquid acidity, liquid-solid ratio and initial concentration of metal ions) , While the adsorption capacity of other minerals on Cs + is relatively small. The adsorption rates of Cs + and Yb3 + decrease with the increase of the initial concentration of metal ions, but the change tendency of Yb3 + is larger. All adsorption isotherms are in accordance with the Freundlich isotherm equation. Under the condition of solution acidity, the adsorption of Cs +, Yb3 + in kaolinite, montmorillonite and chlorite probably ion exchange reaction.