作为一类重要的萘衍生物,萘酚和萘胺广泛用作染料中间体。萘酚和萘胺在水系统中的存在可能由于其致癌性而对环境和公众健康构成风险。在这项研究中,获得了由β-环糊精衍生物和四氟对苯二甲腈制备的四种介孔聚合物,并将其用于吸附1-萘胺,2-萘胺,1-萘酚,和来自水中的2-萘酚。吸附时间的影响,萘酚和萘胺的初始浓度,分别考察了温度和温度对四种聚合物吸附效率的影响。四种聚合物对萘酚和萘胺具有快速的吸附动力学,达到93~100%的1-萘酚吸附平衡吸收,1-萘胺,2-萘胺在15分钟内,在15分钟内对2-萘酚的平衡吸收为87〜90%。动力学可以通过伪二级动力学模型很好地描述。四种聚合物对萘酚和萘胺的吸附等温线符合Redlich-Peterson或Sips模型。1-萘胺的最大吸附容量,2-萘胺,1-萘酚,和2-萘酚为189.9mg/g,82.8mg/g,137.7mg/g,和88.7毫克/克,分别。随着萘酚和萘胺初始浓度的降低,吸附率迅速增加。5mg/L的萘酚和萘胺在25℃下的吸附率可达到95%以上。此外,这四种聚合物可以毫不费力地再生一个温和和简单的洗涤程序,在性能降低。通过提高吸附温度可以改善四种聚合物对四种萘衍生物的吸附性能。总之,制备的β-环糊精聚合物在去除四种低浓度萘衍生物方面具有快速的水处理,再生方便,重复使用性好。
As one group of important naphthalene derivatives, naphthol and naphthylamine are diffusely employed as dye intermediates. The presence of naphthol and naphthylamine in water systems may pose risks to the environment and public health due to their carcinogenicity. In this study, four mesoporous polymers prepared by β-cyclodextrin derivatives and tetrafluoroterephthalonitrile were obtained and applied to adsorbing 1-naphthylamine, 2-naphthylamine, 1-naphthol, and 2-naphthol from water. The impact of adsorption time, initial concentration of naphthol and naphthylamine, and temperature on the adsorption efficiency of the four polymers were explored separately. The four polymers present fast adsorption kinetics toward naphthol and naphthylamine, attaining 93 ~ 100% of adsorption equilibrium uptake for 1-naphthol, 1-naphthylamine, 2-naphthylamine in 15 min, and 87 ~ 90% of equilibrium uptake for 2-naphthol in 15 min. The kinetics could be depicted well by the pseudo-second-order kinetic model. The adsorption isotherms of the four polymers toward naphthol and naphthylamine accord with the Redlich-Peterson or Sips model. The maximum adsorption capacities of 1-naphthylamine, 2-naphthylamine, 1-naphthol, and 2-naphthol are 189.9 mg/g, 82.8 mg/g, 137.7 mg/g, and 88.7 mg/g, respectively. The adsorption ratio increases fast with reducing the initial concentration of naphthol and naphthylamine, and the adsorption ratio of naphthol and naphthylamine in 5 mg/L can achieve over 95% in 25 °C. In addition, the four polymers can be effortlessly regenerated by a gentle and simple washing procedure with little reduction in performance. The adsorption performance of the four polymers toward the four naphthalene derivatives can be improved by increasing the adsorption temperature. In conclusion, the prepared β-cyclodextrin polymers exhibit rapid water treatment in removing the four low-concentration naphthalene derivatives with convenient regeneration and good reusability.