Selective Recovery of Phosphate from River Water Using Molecularly Imprinted Polymers

Kugimiya, Akimitsu; Takei, Hideo

doi:10.1080/00032710701792919

Cited by 27 publications

(14 citation statements)

References 13 publications

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“…For example, the ability to bind and remove phosphates from river water samples was demonstrated using a MIP ( Figure 1) which exploited the affinity and selectivity of thiourea-based functional monomers for phosphate moieties (Kugimiya and Takei, 2006;Kugimiya and Takei, 2008). However, neither this, nor other MIP based receptors that bind phosphate groups, have been integrated with a transducer to produce a sensor capable of measuring phosphate in wastewater samples (Sasaki et al, 1998;Wulff et al, 2006;Emgenbroich et al, 2008 andCutivet et al, 2009).…”

Section: Introductionmentioning

confidence: 99%

Conductance based sensing and analysis of soluble phosphates in wastewater

Warwick

Guerreiro

Gómez‐Caballero

et al. 2014

Biosensors and Bioelectronics

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The current standard method used for measuring soluble phosphate in environmental water samples is based on a colourimetric approach, developed in the early 1960s. In order to provide an alternative, label free sensing solution, a molecularly imprinted polymer (MIP) was designed to function as a phosphate receptor. A combination of functional monomer (N-allylthiourea), cross-linker and monomer/template ratios were optimised in order to maximise the binding capacity for phosphate. When produced in membrane format, the MIP's ability to produce a reversible change in conductance in the presence of phosphate was explored for fabrication of a sensor which was able to selectively detect the presence of phosphate compared to sulphate, nitrate and chloride. In wastewater samples the sensor had a limit of detection of 0.16 mg P/l, and a linear range between 0.66 and 8 mg P/l. This is below the minimum monitoring level (1 mg P/l) as required by current legislation for wastewater discharges, making the sensor as developed promising for direct quantification of phosphate in environmental monitoring applications.

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Section: Introductionmentioning

confidence: 99%

Conductance based sensing and analysis of soluble phosphates in wastewater

Warwick

Guerreiro

Gómez‐Caballero

et al. 2014

Biosensors and Bioelectronics

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“…Kugimiya et al successfully demonstrated the ability to imprint phosphate in a series of papers where an MIP was created using a diphenyl phosphate template with a binding site based on N -allylthiourea for applications in water remediation and phosphate recovery [ 11 , 12 , 13 , 14 ]. More recently, Quint et al further established the suitability of phosphate selective MIPs for use as sensing elements by using carbon nanotubes as a method for electrical transduction to detect the binding event of a phosphate MIP using dipentyl phosphate as the template molecule and methacrylic acid (MAA) as the functional monomer [ 15 ].…”

Section: Introductionmentioning

confidence: 99%

Towards Phosphate Detection in Hydroponics Using Molecularly Imprinted Polymer Sensors

Storer

Coldrick

Tate

et al. 2018

Sensors

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An interdigitated electrode sensor was designed and microfabricated for measuring the changes in the capacitance of three phosphate selective molecularly imprinted polymer (MIP) formulations, in order to provide hydroponics users with a portable nutrient sensing tool. The MIPs investigated were synthesised using different combinations of the functional monomers methacrylic acid (MAA) and N-allylthiourea, against the template molecules diphenyl phosphate, triethyl phosphate, and trimethyl phosphate. A cross-interference study between phosphate, nitrate, and sulfate was carried out for the MIP materials using an inductance, capacitance, and resistance (LCR) meter. Capacitance measurements were taken by applying an alternating current (AC) with a potential difference of 1 V root mean square (RMS) at a frequency of 1 kHz. The cross-interference study demonstrated a strong binding preference to phosphate over the other nutrient salts tested for each formulation. The size of template molecule and length of the functional monomer side groups also determined that a short chain functional monomer in combination with a template containing large R-groups produced the optimal binding site conditions when synthesising a phosphate selective MIP.

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“…The template molecule acts as a coordination centre in a complex formation, with the functional monomers acting as ligands due to them containing functional groups that allow for dipole interactions and hydrogen bonding with the template molecule. The ligand structure is Kugimiya et al has successfully demonstrated the ability to imprint phosphate in a series of papers where a MIP was created using an diphenyl phosphate template with a binding site based on N-allylthiourea for applications water remediation and phosphate recovery [11][12][13][14]. More recently, Quint et al further established the suitability of phosphate selective MIPs for use as sensing elements by using carbon nanotubes as a method for electrical transduction to detect the binding event of a phosphate MIP using dipentyl phosphate as the template molecule and methacrylic acid (MAA) as the functional monomer [15].…”

Section: Introductionmentioning

confidence: 99%