Abstract: A new emerging hormone pollutants in aquatic environment, phthalic acid monoesters can lead to potential human health and ecological risks. In the present study, the adsorption performance of NXD-2（a hydrophilic bifunctional polymeric resin with tertiary amine groups）for mono-n-butyl phthalate (MBP) was studied by means of isotherms, thermodynamics, kinetics and dynamic column adsorption-desorption experiments. An analysis for sorption isotherms and thermodynamics showed that the adsorption of NXD-2 for MBP relied mainly on contribution of hydrogen bonding. The equilibrium adsorption capacities and adsorption rates increased with the increasing temperature in the range of 288—313 K. The results of continuous column adsorption demonstrated that at the condition of inflow with high concentration of MBP 300 mg·L^-1，the removal efficiency of NXD-2 could make the MBP content in effluent lower the detection limit (10 mg·L^-1) for first 100BV of effluent. Furthermore, NXD-2 was of good desorption performance, adsorbed MBP could be completely desorbed when adsorption volume reached 20BV. These results showed that NXD-2 could be an effective sorbent for the removal of phthalic acid monoesters in aqueous solution.

Key words: bifunctional polymeric adsorbent, phthalic acid monoesters, environmental hormone, adsorption, desorption, adsorbents

摘要： 酞酸单酯是水体环境中一类新型的环境激素污染物。以含叔胺基的复合功能树脂NXD-2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、热力学、动力学和柱吸附脱附实验，考察了NXD-2对MBP的吸附性能。研究结果表明，NXD-2对MBP的吸附以氢键作用为主，在288～313 K的温度范围内，平衡吸附量随温度的升高而升高；升高温度有利于加快NXD-2对MBP的去除速率。柱吸附脱附研究表明，在进水浓度为300 mg·L^-1的高浓度条件下，吸附出水的前100 BV中，溶液中MBP的浓度低于检测限（10 mg·L^-1），说明NXD-2对MBP具有较高的处理深度；同时NXD-2具有较好的脱附效果，脱附体积达到20 BV时，脱附率接近100%。因此，复合功能树脂NXD-2作为一种吸附剂，在水体中酞酸单酯的去除方面具有良好的应用前景。

关键词: 复合功能树脂, 酞酸单酯, 环境激素, 吸附, 脱附, 吸附剂