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Abstract
The role of reactive oxygen species (ROS) in electrochemical biofouling inhibition was investigated using a series of abiotic tests and settlement experiments with larvae of the barnacle Amphibalanus amphitrite, a cosmopolitan fouler. Larval settlement, a measure of biofouling potential, was reduced from 43% ± 14% to 5% ± 6% upon the application of pulsed electric signals. The application of ROS scavengers such as glutathione and catalase counteracted the inhibitory effects of the electric signals, allowing settlement, and thus indicating that ROS are antifouling agents. Based on the experimental evidence, the proposed mechanism for ROS-based fouling prevention with interdigitated electrodes involved the electrochemical generation of hydrogen peroxide by oxygen reduction, and its likely reduction to hydroxyl radicals. Either hydroxyl radicals or products of hydroxyl radical reactions appeared to be the main deterrents of larval settlement.
Keywords
Reactive oxygen species,
pulsed electric fields,
settlement,
barnacles,
antifouling coatings,
interdigitated electrodes,
crustacea,
arthropod pests,
arthropods,
control,
invertebrate pests,
aquatic pests,
active oxygen,
hydrogen peroxide,
electrochemical apparatus,
fouling organisms,
marine fouling organisms,
glutathione,
catalase,
hydroxyl group,
pulse techniqes,
electrodes,
Amphibalanus amphitrite
Citation
Perez-Roa, Rodolfo E.; Anderson, Marc A.; Rittschof, Dan; Hunt, Christopher G.; Noguera, Daniel R. 2009. Involvement of reactive oxygen species in the electrochemical inhibition of barnacle (Amphibalanus amphitrite) settlement. Biofouling. Vol. 25, no. 6 (Aug. 2009): pages 563-571.
