Removal of Metaldehyde from Water Using a Novel Coupled Adsorption and Electrochemical Destruction Technique
AbstractMetaldehyde is a selective pesticide applied to control snails and slugs and which, particularly when application rates are high and during periods of high rainfall, may find its way into water courses, some of which may be used as drinking water supplies. Existing water treatment processes have been inadequate for reducing metaldehyde residual levels (up to 8 µg/L) found in some waters to below the EU/UK statutory limit of 0.1 µg/L. Here a novel coupled adsorption and electrochemical regeneration technology is tested to determine if it is capable of effectively removing metaldehyde. We demonstrate that metaldehyde is not only adsorbed on the adsorbent used but is also destroyed during the regeneration stage, resulting in residual metaldehyde concentrations below the EU/UK regulatory limit for drinking water. No known harmful breakdown by-products were observed to be generated by the process. The effectiveness of the process seems unaffected by organic-rich peat water, indicating the potential for the treatment of drinking water much of which in the UK is derived from upland peaty catchments. Furthermore, successive spiking experiments showed that this technology has the potential to be applied as a continuous process without the generation of substantial waste products. View Full-Text
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Nabeerasool, M.A.; Campen, A.K.; Polya, D.A.; Brown, N.W.; van Dongen, B.E. Removal of Metaldehyde from Water Using a Novel Coupled Adsorption and Electrochemical Destruction Technique. Water 2015, 7, 3057-3071.
Nabeerasool MA, Campen AK, Polya DA, Brown NW, van Dongen BE. Removal of Metaldehyde from Water Using a Novel Coupled Adsorption and Electrochemical Destruction Technique. Water. 2015; 7(6):3057-3071.Chicago/Turabian Style
Nabeerasool, Mohammed A.; Campen, Andrew K.; Polya, David A.; Brown, Nigel W.; van Dongen, Bart E. 2015. "Removal of Metaldehyde from Water Using a Novel Coupled Adsorption and Electrochemical Destruction Technique." Water 7, no. 6: 3057-3071.