通过水热法合成铝基-金属有机骨架(MOFs)MIL-96材料,并将其作为吸附剂用于脱除水溶液中的萘。采用扫描电子显微镜、X射线衍射仪和N2吸附-脱附等方法对材料进行表征。通过考察吸附动力学、吸附等温线以及热力学特征研究了MIL-96材料的吸附性能。研究结果表明:在温度298K、MIL-96材料用量为0.5g/L时,对萘的最大去除率达到约98％;MIL-96对萘的吸附特征符合准二级吸附动力学模型,Temkin和D-R等温吸附模型对萘吸附过程的描述比其他模型准确;Temkin等温吸附方程中吸附热相关系数表明,MIL-96吸附水溶液中萘的过程为吸热过程,热力学参数中正的标准焓变(ΔHo)值也说明该吸附过程为吸热过程。
An aluminum-based metal-organic frameworks MIL-96 material was synthesized by hydrothermal method,and it was used as the adsorbent to remove naphthalene from aqueous solution.And MIL-96 was characterized by scanning electron microscopy,X-ray diffraction and N2 adsorption-desorption isotherms.Adsorption property of MIL-96 was investigated by analyzing kinetics,adsorption isotherms and thermodynamic.The results showed that the maximal removal efficiency of naphthalene by MIL-96 with the dosage of 0.5g/L reached up to about 98% at 298K.Adsorption kinetics of naphthalene onto MIL-96 followed the pseudo-second-order equation,the Temkin and the D-R isotherms fitted better than other models for the adsorption process.The parameter bT of the Temkin equation showed that the adsorption of naphthalene onto MIL-96 was an endothermic process and the positive ΔHo in the thermodynamic also proved that the adsorption process was endothermic.
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基金资助
国家自然科学基金(21407001)
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