Selective removal of 2,4-dichlorophenoxyacetic acid from water by molecularly-imprinted amino-functionalized silica gel sorbent

Han, Dandan; Jia, Wenping; Liang, Huading

doi:10.1016/s1001-0742(09)60099-1

Cited by 69 publications

(22 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Imprinted and non-imprinted polymer showed similar location and appearance of the major bands. This result is consistent with the previous report [33]. …”

Section: Characterization Of Tem and Ft-ir Spectrasupporting

confidence: 94%

Construction of uniformly sized pseudo template imprinted polymers coupled with HPLC–UV for the selective extraction and determination of trace estrogens in chicken tissue samples

Wang

et al. 2011

Journal of Hazardous Materials

View full text Add to dashboard Cite

“…Imprinted and non-imprinted polymer showed similar location and appearance of the major bands. This result is consistent with the previous report [33]. …”

Section: Characterization Of Tem and Ft-ir Spectrasupporting

confidence: 94%

Construction of uniformly sized pseudo template imprinted polymers coupled with HPLC–UV for the selective extraction and determination of trace estrogens in chicken tissue samples

Wang

et al. 2011

Journal of Hazardous Materials

View full text Add to dashboard Cite

“…Based on 3s/s, in which s means the standard deviation of the blank measurements, and s means the slope of calibration curve, the limit of detection (LOD) was attained as low as 0.14 μM. The value is lower than the MCL for 2,4-D in drinking water, i.e., 0.32 μM (70 μg L À 1 ) regulated by the WHO and EPA (Hamilton et al, 2003;Han et al, 2010).…”

Section: Sensitivity and Selectivity Of The Sensormentioning

confidence: 99%

“…It belongs to the top10 hit-list of pesticides used all over the world since it has strong endocrine-disrupting activities . The World Health Organization (WHO) and United States Environmental Protection Agency (EPA) have regulated 70 μg L À 1 as the maximum contaminant level (MCL) of 2,4-D in drinking water (Hamilton et al, 2003;Han et al, 2010). Considering its healthy and toxicological effects, the recognition and detection of 2,4-D at low concentrations is of great importance and a major challenge.…”

Section: Introductionmentioning

confidence: 99%

A molecular imprinting-based turn-on Ratiometric fluorescence sensor for highly selective and sensitive detection of 2,4-dichlorophenoxyacetic acid (2,4-D)

Wang

et al. 2016

Biosensors and Bioelectronics

166

View full text Add to dashboard Cite

a b s t r a c tA novel molecular imprinting-based turn-on ratiometric fluorescence sensor was constructed via a facile sol-gel polymerization for detection of 2,4-dichlorophenoxyacetic acid (2,4-D) on the basis of photoinduced electron transfer (PET) by using nitrobenzoxadiazole (NBD) as detection signal source and quantum dots (QDs) as reference signal source. With the presence and increase of 2,4-D, the amine groups on the surface of QDs@SiO 2 could bind with 2,4-D and thereby the NBD fluorescence intensities could be significantly enhanced since the PET process was inhibited, while the QDs maintained constant intensities. Accordingly, the ratio of the dual-emission intensities of green NBD and red QDs could be utilized for turn-on fluorescent detection of 2,4-D, along with continuous color changes from orange-red to green readily observed by the naked eye. The as-prepared fluorescence sensor obtained high sensitivity with a low detection limit of 0.14 μM within 5 min, and distinguished recognition selectivity for 2,4-D over its analogs. Moreover, the sensor was successfully applied to determine 2,4-D in real water samples, and high recoveries at three spiking levels of 2,4-D ranged from 95.0% to 110.1% with precisions below 4.5%. The simple, rapid and reliable visual sensing strategy would not only provide potential applications for high selective ultratrace analysis of complicated matrices, but also greatly enrich the research connotations of molecularly imprinted sensors.

show abstract

“…The α values for the imprinted sorbent with the corresponding non-imprinted sorbent have indicated that there is a significant increase in α for 2-HA through imprinting [34]. For example, the α (2-HA/3-HA) value of the imprinted sorbent (14.59) is 8.3-fold that of the non-imprinted sorbent (1.9).…”

Section: Resultsmentioning

confidence: 99%

Synthesis and Evaluation of Molecularly Imprinted Silica Gel for 2-Hydroxybenzoic Acid in Aqueous Solution

Raof

Mohamad²,

Abas³

2013

IJMS

View full text Add to dashboard Cite

A molecularly imprinted silica gel sorbent for selective removal of 2-Hydroxybenzoic acid (2-HA) was prepared by a surface imprinting technique with a sol-gel process. The 2-HA molecularly imprinted silica gel (2-HA-MISG) sorbent was evaluated by various parameters, including the influence of pH, static, kinetic adsorption and selectivity experiments. The optimum adsorption capacity to the 2-HA appeared to be around pH 2 by the polymer. Morevoer, the imprinted sorbent displayed fast uptake kinetics, obtained within 20 min. The adsorption capacity of the 2-HA-MISG (76.2 mg g−1) was higher than that of the non-imprinted silica gel (NISG) (42.58 mg g−1). This indicates that the 2-HA-MISG offers a higher affinity for 2-HA than the NISG. The polymer displays good selectivity and exhibits good reusability. Experimental results show the potential of molecularly imprinted silica sorbent for selective removal of 2-HA.

show abstract

Selective removal of 2,4-dichlorophenoxyacetic acid from water by molecularly-imprinted amino-functionalized silica gel sorbent

Cited by 69 publications

References 23 publications

Construction of uniformly sized pseudo template imprinted polymers coupled with HPLC–UV for the selective extraction and determination of trace estrogens in chicken tissue samples

Construction of uniformly sized pseudo template imprinted polymers coupled with HPLC–UV for the selective extraction and determination of trace estrogens in chicken tissue samples

A molecular imprinting-based turn-on Ratiometric fluorescence sensor for highly selective and sensitive detection of 2,4-dichlorophenoxyacetic acid (2,4-D)

Synthesis and Evaluation of Molecularly Imprinted Silica Gel for 2-Hydroxybenzoic Acid in Aqueous Solution

Contact Info

Product

Resources

About