超高交联树脂NXD-4对水中邻苯二甲酸单丁酯的去除性能

Adsorption of Mono-n-butyl Phthalate from Aqueous Phase onto Hyper-crosslinked Polymeric Adsorbent NXD-4

以新合成的超高交联吸附树脂NXD-4为吸附剂,以邻苯二甲酸单丁酯(MBP)为目标污染物,通过吸附等温线和动力学实验,考察了NXD-4对MBP的去除性能并与活性炭AC-1进行了对比。结果表明,NXD-4和AC-1对MBP的去除均以物理吸附为主,在288~313 K温度范围内,最大吸附量随温度的升高而降低;相同条件下,NXD-4对MBP的吸附量明显大于AC-1的;而且,它们对MBP均具有较快的去除速率,在1750min左右即可达到吸附平衡,但AC-1对MBP的吸附速率大于NXD-4的;脱附再生实验表明,相比于AC-1,NXD-4的脱附再生效果更好,脱附率可以达到96%以上。因此,NXD-4作为吸附剂,对水体中邻苯二甲酸单酯的去除方面具有良好的应用前景。

A hyper-crosslinked resin NXD-4 was synthesized,and then the adsorption performance of mono-nbutyl phthalate(MBP) onto NXD-4 was studied compared with activated carbon(AC-1). Analyses of sorption isotherms and thermodynamics proved that their adsorption behaviors both are physical adsorption, their unit adsorption capacities decreased with increasing temperature of the solution and NXD-4 's unit adsorption capacity is higher than that of AC-1 at the same condition. The results of the adsorption kinetic of NXD-4 for MBP illustrated that the time of equilibrium adsorption of MBP is about 1750 min although this adsorption rate is slower than that of AC-1.In addition,compared to AC-1,desorption MBP out of NXD-4 with a significant desorption rate above 96%. These results indicated NXD-4 to be effective sorbents that can be used to remove relative high concentration of MBP from aqueous solution.