Cigarette butts, a threat for marine environments

Chemical substances and pH reduction are responsible for decalcifying and dissolution processes and cellular death.

Fig. 1:Schematic design of the experiment.

Fig.2: Examples of shell dissolution
Cigarette butts are the most common form of litter in the world and their environmental impact is related to both persistence and potential toxic effects for chemical composition. The objective of this study was to assess the acute toxicity (LC50-48 h) of human-smoked cigarette butts leachate on 3 cultured genera of benthic foraminifera: the calcareous perforate Rosalina globularis, the calcareous imperforate Quinqueloculina spp., and the agglutinated Textularia agglutinans. The specimens were exposed to 16, 8, 4, 2, and 1 cigarette butts/L concentrations that prove to be acutely toxic to all taxa. Starting from 4 cigarette butts/L, both calcareous genera showed shell decalcification, and death of almost all the individuals, except for the more resistant agglutinated species. These results suggest the potential harmfulness of cigarette butts leachate related to pH reduction and release of toxic substances, in particular nicotine, which leads to physiology alteration and in many cases cellular death.
The study, carried out at the Synchrotron Infrared Source for Spectroscopy and Imaging (SISSI) at Elettra - Sincrotrone Trieste in Italy, was used to provide experimental proof and the results were published in the journal "Science Direct".

Original Article'Cigarette butts, a threat for marine environments: Lessons from benthic foraminifera (Protista)'.
Francesca Caridi, Anna Sabbatini, Giovanni Birarda, Elisa Costanzi, Giovanni De Giudici, Roberta Galeazzi,  Daniela Medas, Giovanna Mobbili, Massimo Ricciutelli, Maria Letizia Ruello, Lisa Vaccari, Alessandra Negri.
Science Direct (September 2020).
DOI:   pdf


Last Updated on Wednesday, 14 October 2020 15:14