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

Dai C, Zhang J, Zhang Y, Zhou X, Liu S - PLoS ONE (2013)

Bottom Line: 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.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.

View Article: PubMed Central - PubMed

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

ABSTRACT
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.

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MIP regeneration cycles in spiked lake water.
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pone-0078167-g007: MIP regeneration cycles in spiked lake water.

Mentions: The regeneration of MIP was investigated in twelve sequential cycles of adsorption–desorption. After adsorption of CA onto the MIP, the MIP was regenerated using the methanol/acetic acid mixture (9∶1, v:v). Fig. 7 shows the adsorption efficiency of the MIP for CA in twelve consecutive adsorption-regeneration cycles. It was shown that the MIP can be used at least 12 cycles without obvious decrease in the adsorption efficiency for CA, which provided evidence that the MIP had certain regeneration adsorption efficiency and could be used repeatedly. Therefore, using MIP as absorbent to remove pollutants from water showed potential to reduce the cost of water treatment.


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

Dai C, Zhang J, Zhang Y, Zhou X, Liu S - PLoS ONE (2013)

MIP regeneration cycles in spiked lake water.
© Copyright Policy
Related In: Results  -  Collection

Show All Figures
getmorefigures.php?uid=PMC3814990&req=5

pone-0078167-g007: MIP regeneration cycles in spiked lake water.
Mentions: The regeneration of MIP was investigated in twelve sequential cycles of adsorption–desorption. After adsorption of CA onto the MIP, the MIP was regenerated using the methanol/acetic acid mixture (9∶1, v:v). Fig. 7 shows the adsorption efficiency of the MIP for CA in twelve consecutive adsorption-regeneration cycles. It was shown that the MIP can be used at least 12 cycles without obvious decrease in the adsorption efficiency for CA, which provided evidence that the MIP had certain regeneration adsorption efficiency and could be used repeatedly. Therefore, using MIP as absorbent to remove pollutants from water showed potential to reduce the cost of water treatment.

Bottom Line: 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.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.

View Article: PubMed Central - PubMed

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

ABSTRACT
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.

Show MeSH
Related in: MedlinePlus