聚苯乙烯?二乙烯苯树脂对苯酚和2-萘酚的吸附性能

Adsorption Properties of Polystyrene?Divinyl Benzene Resin to Phenol and 2-Naphthol

合成了聚苯乙烯?二乙烯苯吸附树脂NDA-150,研究了NDA-150和市售吸附树脂XAD-4对苯酚和2-萘酚的静态和动态吸附性能.结果表明,在研究的浓度范围内,吸附符合Langmuir等温吸附方程且吸附为放热过程.NDA-150对苯酚和2-萘酚的吸附与树脂的比表面积、微孔面积及酚类物质的疏水性有关.随流速增大,树脂穿透时间及饱和时间提前,平衡吸附量降低;初始溶液浓度增大,树脂穿透时间及饱和时间提前,平衡吸附量增大.NDA-150树脂对2-萘酚和苯酚的动态吸附较好地符合Thomas模型和LDF模型.含0.1 mol/L Na OH的60%乙醇溶液从NDA-150树脂中脱附2-萘酚和苯酚,脱附率可达90%以上.

Polystyrene-divinyl benzene resin NDA-150 was prepared, and its static and dynamic adsorption properties of NDA-150 resin toward phenol and 2-naphthol were compared with commercially available XAD-4 resin. Taking the properties of adsorption resins and phenolics into account, the differences of adsorption capacities resulted from the specific surface area and micropore volume of adsorbents and Kow value of phenolics. Dynamic experimental data showed that breakthrough time and saturation time of the resin advanced with the increase of velocity, while saturating adsorption capacity decreased, but with the increase of initial concentration, breakthrough time and saturation time of the resin advanced, and equilibrium adsorption capacity increased. The dynamic experimental data of NDA-150 resin on adsorption of phenol and 2-naphthol accorded well with Thomas and LDF models. The ethanol solution of 60% mass fraction dissolved with 0.1 mol/L Na OH had a desorption rate of over 90% for 2-naphthol and phenol.