In Cedre’s test tank as well as in Brest’s Marina du Château, an experiment has recently begun to study the weathering of cigarette butts immersed in seawater for a duration of 1 to 2 years. This study is carried out in tandem with that conducted on Cedre’s man-made beach (comparison of the weathering of cigarette butts on the sand).
Several dozen cigarettes of three different brands have been placed in stainless steel wire mesh envelopes attached to stainless steel frames. Each envelope is marked with a small numbered coloured ring.
The butts will be sampled every 3 months for the first year, then every 6 months in order to:
- weigh them and visually inspect them for signs of deterioration
- analyse their contamination (or rather decontamination as cigarette butts release their contaminants over time)
- perform toxicity tests on bacteria.