Analysis of clogging in constructed wetlands using magnetic resonance

Robert Morris; Michael Newton; Paul Knowles; Martin Bencsik; Philip Davies; Paul Griffin; Glen McHale

doi:10.1039/C0AN00986E

Analysis of clogging in constructed wetlands using magnetic resonance

Robert Morris, Michael Newton, Paul Knowles, Martin Bencsik, Philip Davies, Paul Griffin, Glen McHale

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Abstract

In this work we demonstrate the potential of permanent magnet based magnetic resonance sensors to monitor and assess the extent of pore clogging in water filtration systems. The performance of the sensor was tested on artificially clogged gravel substrates and on gravel bed samples from constructed wetlands used to treat wastewater. Data indicate that the spin lattice relaxation time is linearly related to the hydraulic conductivity in such systems. In addition, within biologically active filters we demonstrate the ability to determine the relative ratio of biomass to abiotic solids, a measurement which is not possible using alternative techniques.

Original language	English
Pages (from-to)	2283-2286
Journal	The Analyst
Volume	136
Issue number	11
DOIs	https://doi.org/10.1039/C0AN00986E
Publication status	Published - 2011

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10.1039/C0AN00986E

Postprint McHale Analyst vol 136 p2283 2011Accepted author manuscript, 581 KB

Cite this

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AU - Newton, Michael

AU - Knowles, Paul

AU - Bencsik, Martin

AU - Davies, Philip

AU - Griffin, Paul

AU - McHale, Glen

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AB - In this work we demonstrate the potential of permanent magnet based magnetic resonance sensors to monitor and assess the extent of pore clogging in water filtration systems. The performance of the sensor was tested on artificially clogged gravel substrates and on gravel bed samples from constructed wetlands used to treat wastewater. Data indicate that the spin lattice relaxation time is linearly related to the hydraulic conductivity in such systems. In addition, within biologically active filters we demonstrate the ability to determine the relative ratio of biomass to abiotic solids, a measurement which is not possible using alternative techniques.

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Analysis of clogging in constructed wetlands using magnetic resonance

Abstract

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