分别用乙酰苯胺、水杨酸化学修饰氯甲基化低交联大孔苯乙烯-二乙烯苯聚合物,合成超高交联吸附树脂FZH03、FZH04。与Amberlite XAD-4对照,研究了这两种树脂在不同温度下对水溶液中对氯苯酚的静态吸附和动态吸附行为。结果表明,两种树脂的等温吸附数据可被Langmuir和Freundlich等温吸附方程很好地进行拟合,对对氯苯酚的吸附量明显高于XAD-4,是焓推动的吸附过程,对对氯苯酚吸附动力学均符合一级动力学方程,有两个独立的动力学过程,颗粒内扩散是该吸附过程的速控步骤。
Two adsorption resins （FZH03 and FZH04） were synthesized by modifying chloromethylatecl low- crosslinked polystyrene-divinylbenzene with acetanilide and salicylic acid respectively. The adsorption behavior of p- chlorophenol on FZH03 and FZH04 was investigated at different temperature using the commercial Amberlite XAD-4 as a reference. The results indicate that isothermal adsorption data is well fitted into Langmuir and Freundlich isotherm equations. The capacities of equilibrium ad~rption for p-chlorophenol on FZH03 and FZH04 resins from aqueous solution were higher than those on Amberlite XAD-4 within the temperature range 288K--318K, and the admrption mainly was a physical admrption process promoted by enthalpy. The adsorption dynamics of p- chlorophenol on FZH03 and FZH04 were fitted into first-order dynamics equation, including two independent dynamics process and intraparticle diffusion was the rate-deter mining step in the adsorption process.
参考文献
| [1] | Fei ZH;Chen JL;Cai HG;Gao GD;Li AM;Zhang QX .Adsorption characteristics of phenolic compounds onto a new hypercrosslinked polymeric resin containing the 2-carbonylbenzoyl group (ZH-01)[J].Adsorption Science & Technology,2004(5):439-449. |
| [2] | Fei ZH;Chen JL;Cai JG;Qiu YP;Li AM;Zhang QX .Adsorption of 2,4-dichlorobenzoxyacetic acid onto hypercrosslinked resin modified by phenolic hydroxyl group (AM-1)[J].Chinese journal of polymer science,2004(6):529-533. |
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