Synthesis of a perfluorooctanoic acid molecularly imprinted polymer for the selective removal of perfluorooctanoic acid in an aqueous environment

2016 ◽  
Vol 133 (15) ◽  
pp. n/a-n/a ◽  
Author(s):  
Fengmei Cao ◽  
Lei Wang ◽  
Xinhao Ren ◽  
Hongwen Sun
Keyword(s):  
Molecularly Imprinted Polymer ◽  
Perfluorooctanoic Acid ◽  
Selective Removal ◽  
Aqueous Environment ◽  
Imprinted Polymer ◽  
Molecularly Imprinted

scholarly journals Selective Removal of Perfluorooctanoic Acid Using Molecularly Imprinted Polymer-Modified TiO2Nanotube Arrays

2016 ◽  
Vol 2016 ◽  
pp. 1-10 ◽  
Author(s):  
Yunbo Wu ◽  
Yi Li ◽  
Aijun Tian ◽  
Kai Mao ◽  
Jian Liu
Keyword(s):  
Molecularly Imprinted Polymer ◽  
Degradation Mechanism ◽  
Pure Water ◽  
Perfluorooctanoic Acid ◽  
Selective Removal ◽  
Secondary Effluent ◽  
Imprinted Polymer ◽  
Molecularly Imprinted ◽  
Treatment Processes ◽  
Perfluorinated Chemicals

Perfluorinated chemicals have attracted worldwide concern owing to their wide occurrence and resistance to most conventional treatment processes. In this work, a novel photocatalyst was fabricated by modifying TiO2nanotube arrays with molecularly imprinted polymers. The molecularly imprinted polymer-modified TiO2nanotubes (MIP-TiO2NTs) were characterized and tested for the selective removal of perfluorooctanoic acid (PFOA) from water. The amount of PFOA adsorbed by the MIP-TiO2NTs was as high as 0.8125 μg/cm2. PFOA decomposition and defluorination by the MIP-TiO2NTs reached 84% and 30.2% after 8 h reaction, respectively. The Freundlich model and pseudo-first-order kinetics were used to describe the observed adsorption and decomposition of PFOA, respectively. Compared with TiO2NTs and nonmolecularly imprinted polymer-modified TiO2NTs, the MIP-TiO2NTs exhibited not only a higher PFOA degradation rate but also enhanced selectivity for target chemicals. The MIP-TiO2NTs could also selectively and rapidly remove PFOA from secondary effluent, exhibiting a decomposition of 81.1%, almost as high as that observed in pure water. Investigation of the effects of scavengers on the photocatalytic reaction indicated that photogenerated holes were the main oxidant for PFOA decomposition, and the PFOA degradation mechanism and pathway were proposed.

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