Analysis of clogging in constructed wetlands using magnetic resonance

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

Research output: Contribution to journalArticlepeer-review

14 Citations (Scopus)
5 Downloads (Pure)


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 languageEnglish
Pages (from-to)2283-2286
JournalThe Analyst
Issue number11
Publication statusPublished - 2011


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