分子印迹聚合物在从水中选择性去除氯贝酸中的应用。

Application of molecularly imprinted polymers to selective removal of clofibric acid from water.

作者信息

Dai Chaomeng, Zhang Juan, Zhang Yalei, Zhou Xuefei, Liu Shuguang

机构信息

College of Civil Engineering, Tongji University, Shanghai, China ; State Key Laboratory of Pollution Control and Resource Reuse, Tongji University, Shanghai, China.

出版信息

PLoS One. 2013 Oct 31;8(10):e78167. doi: 10.1371/journal.pone.0078167. eCollection 2013.

A new molecularly imprinted polymer (MIP) adsorbent for clofibric acid (CA) was prepared by a non-covalent protocol. Characterization of the obtained MIP was achieved by scanning electron microscopy (SEM) and nitrogen sorption. Sorption experimental results showed that the MIP had excellent binding affinity for CA and the adsorption of CA by MIP was well described by pseudo-second-order model. Scatchard plot analysis revealed that two classes of binding sites were formed in the MIP with dissociation constants of 7.52 ± 0.46 mg L(-1) and 114 ± 4.2 mg L(-1), respectively. The selectivity of MIP demonstrated higher affinity for CA over competitive compound than that of non-imprinted polymers (NIP). The MIP synthesized was used to remove CA from spiked surface water and exhibited significant binding affinity towards CA in the presence of total dissolved solids (TDS). In addition, MIP reusability was demonstrated for at least 12 repeated cycles without significant loss in performance.

通过非共价方法制备了一种用于氯贝酸（CA）的新型分子印迹聚合物（MIP）吸附剂。通过扫描电子显微镜（SEM）和氮吸附对所得MIP进行了表征。吸附实验结果表明，MIP对CA具有优异的结合亲和力，并且MIP对CA的吸附可用伪二级模型很好地描述。Scatchard图分析表明，MIP中形成了两类结合位点，解离常数分别为7.52±0.46 mg L(-1)和114±4.2 mg L(-1)。MIP的选择性表明，与非印迹聚合物（NIP）相比，其对CA的亲和力高于竞争性化合物。合成的MIP用于从加标的地表水中去除CA，并且在总溶解固体（TDS）存在的情况下对CA表现出显著的结合亲和力。此外，MIP至少可重复使用12个循环，性能无明显损失。