13X分子筛对水体中钒离子的吸附

为研究分子筛对水体中重金属的吸附效果，选取了13X分子筛作为实验材料，研究其对钒离子的吸附效果。分别研究了在不同温度、时间、溶液pH值和初始钒浓度的条件下，13X分子筛对钒离子的吸附量，结果表明：酸性条件更利于13X分子筛对钒的吸附，溶液pH≥5时吸附量趋于0；随着反应温度的升高，13X分子筛对钒离子的吸附量逐渐增加；13X分子筛对钒离子的吸附符合Langmuir模型和拟二级动力学模型。13X分子筛对钒离子具有一定的吸附效果，在一定的处理工艺条件下，可作为水体钒污染的修复材料。但针对不同来源废水的特点，需对分子筛进行改性并进一步优化修复工艺条件以实际应用。

Adsorption of vanadium on 13X molecular sieve in aqueous solution

To study the potential of using zeolite molecular sieve to remove heavy metals from aqueous environment, the adsorption of vanadium (V) on 13X molecular sieve were studied under different temperatures, solution pH values, and initial V(V) concentrations. The results shows that 1) the adsorption amount of V on 13X molecular sieve was much higher in acidic solution than in alkaline solution; 13X molecular sieve had no adsorption ability towards V(V) at pH ≥5; 2) the amount of V adsorbed on 13X molecular sieve increased gradually with increasing temperature; 3) the adsorption of V(V) on 13X molecular sieve fitted the Langmuir model and the pseudo-second-order kinetic model well. These results indicate that 13X molecular sieve is a potential absorbent that can be used to remediate V-contaminated water. However, before this technology is used widely in water treatment, more detailed studies are required on V absorbed on 13X molecular sieve under different environmental conditions and on the modification of 13X molecular sieve to improve the removal rate.