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以Ui O-66型金属有机框架为吸附剂,研究了时间、p H值和温度对自制金属有机框架Ui O-66吸附2,4-D性能的影响.结果表明,Ui O-66的吸附平衡时间为24 h;初始溶液最佳p H值为4.0;Ui O-66上的平衡吸附量随温度的升高而增加,实验最佳温度应控制在30℃.Ui O-66对2,4-D的吸附符合Langmuir吸附模型;吸附动力学符合拟二级模型;颗粒内扩散过程是吸附速率控制步骤;热力学计算结果显示ΔG<0、ΔH>0、ΔS>0,由此判断吸附是自发、吸热、熵增加的化学过程.本实验表明,Ui O-66在去除农业废水中2,4-D领域有实际应用的潜力.
The effects of time, p H value and temperature on the adsorption of 2,4-D on Ui O-66 were studied using Ui O-66 metal-organic framework as adsorbent. The results showed that the adsorption of Ui O-66 The equilibrium time was 24 h, the optimum pH of the initial solution was 4.0, the equilibrium adsorption capacity of Ui O-66 increased with the increase of temperature, and the optimum temperature of the experiment should be controlled at 30 ℃ .Ui O- The adsorption kinetics of 4-D accords with the Langmuir adsorption model; the adsorption kinetics conforms to the pseudo-second-order model; the intra-particle diffusion process is the adsorption rate control step; the thermodynamic calculation results show that ΔG <0, ΔH> 0 and ΔS> Spontaneous, endothermic, entropy increase of the chemical process.This experiment shows that, Ui O-66 in the removal of agricultural wastewater 2,4-D field has practical application of the potential.