http://dx.doi.org/10.5902/223611704987In shrimp culture, sodium metabissulfite is used for the preservation after the harvest. However, largeparts are discarded in an irregular manner directly to mangrove swamps and other receptorsbiotopes. Amongst others, this substance acts by provoking desorption of oxygen, leading to severedamage of the ecosystem. We developed an experimental method to study desorption andc...