活性炭固定床吸附分离溶液中表面活性剂和多环芳烃

Adsorption and separation of surfactants and polycyclic aromatic hydrocarbons from solution in activated carbon fixed bed

利用活性炭固定床吸附分离表面活性剂和多环芳烃(PAH)的混合溶液,选取了具代表性的表面活性剂(TX100)和PAH(菲(PHE)等)。实验结果表明,流量越低、活性炭填充量越多、表面活性剂浓度越高、PAH浓度越低,越有利于表面活性剂的回收和PAH的去除。定义了有效回收时间,该时间是指PAH穿透10%的时间与表面活性剂穿透90%的时间之差,该时间越长,越有利于表面活性剂的回收。采用BDST和Thomas模型对TX100和PHE进行了吸附模拟,效果均较好;BDST模型拟合结果表明,当活性炭对TX100的吸附接近饱和时仍对PHE有较强的吸附能力。活性炭固定床吸附分离法可节约运行成本0.06元/L。

Surfactants and polycyclic aromatic hydrocarbons （PAH） represented by surfactant TX100 and phenanthrene （PHE） were adsorbed and separated from solution in an activated carbon fixed bed. The experimental result showed that the lower flow, more activated carbon amount, higher surfactant concentration and lower PAH concentration, the more beneficial to surfactant recovery and PAH removal. The effective recovery time was defined as the time difference between 10% of PAH breakthrough and 90% of TX100 breakthrough, and long effective recovery time benefited to surfactant recovery. The adsorption of TX100 and PHE fired BDST and Thomas models well, and the BDST model firing results showed that the near TX100-saturated activated carbon still had good adsorption capability. The running costs could reduce about 0.06 Yuan/L by this process.