MIEX对水中DBP的去除效果及机理分析

发布时间：2018-11-28 14:21

【摘要】：邻苯二甲酸二丁酯(DBP)是水源水中常见的内分泌干扰物。以新型的饮用水处理材料离子交换树脂(MIEX)为吸附剂,以DBP为目标污染物,从动力学、吸附等温线、电荷密度测定、红外光谱表征、X射线光电子能谱以及共存组分影响等方面分析了MIEX去除DBP的效果和机理。MIEX去除DBP的过程仅需20 min即达到平衡,可用准二级动力学描述,中性溶液中DBP的饱和吸附量为0.944 mg·g-1。中性条件下DBP带电量仅为2.7×10~(-3)mmol·mmol~(-1),MIEX与DBP间的作用并非离子交换,而是以DBP分子与MIEX基材间的疏水作用以及氢键作用为主。高浓度SO_4~(2-)和Cl~-不会对DBP的去除效果产生影响;高浓度的腐殖酸(HA)轻微抑制DBP的去除,但微量DBP并不会影响MIEX对HA的去除效果。因此,MIEX作为能高效去除水中天然有机物的新型材料,也可用于去除其中微量的DBP,适用于饮用水复合污染的处理。
[Abstract]:Dibutyl phthalate (DBP) is a common endocrine disruptor in source water. A new type of drinking water treatment material, ion exchange resin (MIEX), was used as adsorbent, DBP as target pollutant, from kinetics, adsorption isotherm, charge density measurement, infrared spectrum characterization. The effect and mechanism of DBP removal by MIEX were analyzed from the aspects of X-ray photoelectron spectroscopy (XPS) and the influence of coexisting components. The process of DBP removal by MIEX only needs 20 min to achieve equilibrium, which can be described by quasi-second-order kinetics. The saturated adsorption capacity of DBP in neutral solution is 0.944 mg g ~ (-1). Under neutral conditions, the electricity of DBP band is only 2.7 脳 10 ~ (-3) mmol mmol~ (-1), MIEX) and the interaction between DBP and DBP is not ion exchange, but the hydrophobic interaction and hydrogen bond between DBP molecule and MIEX substrate. High concentrations of SO_4~ (2-) and Cl~- had no effect on the removal of DBP, while high concentration of (HA) slightly inhibited the removal of DBP, but a small amount of DBP did not affect the removal of HA by MIEX. Therefore, MIEX, as a new material which can efficiently remove natural organic compounds in water, can also be used to remove trace DBP, which is suitable for the treatment of drinking water compound pollution.
【作者单位】：天津工业大学环境与化学工程学院;省部共建分离膜与膜过程国家重点实验室(天津工业大学);
【基金】：国家自然科学基金项目(51478314,51138008,21206125,51308391,51308390) 天津市科技计划项目(14ZCDGSF00128,14JCQNJC09000)~~
【分类号】：X52

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