Adsorptive removal of 1-naphthol from water with Zeolitic imidazolate framework-67
Adsorptive removal of 1-naphthol from water with Zeolitic imidazolate framework-67
复制标题
用沸石咪唑酯框架 67 吸附去除水中 1-萘酚
DOI：
10.1016/j.jpcs.2017.03.024
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发表时间：
2017
影响因子：
4
通讯作者：
Zhou Min
中科院分区：
文献类型：
--
作者：
Yan Xinlong;Hu Xiaoyan;Chen Tao;Zhang Shiyu;Zhou Min
1-萘酚被广泛用作塑料、染料、纤维和橡胶生产领域的中间体，导致土壤和水环境中检测到越来越多的1-萘酚，由于其急性毒性和负面环境影响而特别令人关注。考虑到ZIFs（沸石咪唑骨架）材料的高比表面积和良好的稳定性，合成了ZIF-67（一种代表性的钴基ZIFs材料），并将其用作从水溶液中去除1-萘酚的吸附剂。采用XRD、TEM、XPS、N2物理吸附和TG等手段对ZIF-67进行了表征，并对ZIF-67的吸附等温线、吸附动力学和再生进行了研究。ZIF-67对1-萘酚的吸附符合准二级动力学方程，符合Langmuir吸附模型，在313 K时最大吸附量为339 mg/g，远高于活性炭和碳纳米管等常用吸附剂的吸附量。这可以通过控制该过程的主要机制即静电吸引来解释。此外，ZIF-67显示出从碱性水溶液中去除1-萘酚的理想的可重复使用性。
1-Naphthol is widely used as an intermediate in the plastics, dyes, fibers and rubbers production areas, leading to the increasing detection of 1-naphthol in the soil and water environment, which is of particular concern due to its acute toxicity and negative environmental impacts. Considering the high surface area and good stability of ZIFs (zeolitic imidazole frameworks) material, ZIF-67 (a representative cobalt-based ZIFs material) was synthesized and applied as an adsorbent for removal of 1-naphthol from aqueous solution. The obtained ZIF-67 was characterized by XRD, TEM, XPS, N2physisorption and TG, and the adsorption isotherm, kinetics, and regeneration of the adsorbent were studied in detail. The adsorption of 1-naphthol on ZIF-67 followed a pseudo-second-order equation kinetics and fitted Langmuir adsorption model with a maximum adsorption capacity of 339 mg/g at 313 K, which is much higher than that of the common adsorbents reported such as activated carbon and carbon nanotubes et al. The solution pH was found to be an important factor influencing the adsorption process, which could be explained by the predominant mechanism controlling the process, i.e. electrostatic attraction. In addition, the ZIF-67 showed desirable reusability toward 1-naphthol removal from alkaline aqueous solution.