Substance and pollutant

Operation consisting in partly or entirely treating a polluted environment (soil, water, air) by eliminating or greatly reducing the polluting load in order to restore its functions and remediate it for use.

Maximum allowable concentration for a pollutant in a medium (air, water, soil) in a food or drink.

Concentration of a toxic substance that causes the death of a percentage n in a given population, for a given time and in a given experiment (LCn). We speak of LC0 for the maximum tested concentration applied in a single dose and causing no death in the population of studied organisms during a given time. Finally we talk about LC50 for a concentration applied in a single dose and causing 50% mortality in the population of…

Representative ambient concentration of an element in a compound or in a substance in a given environment. It takes into account natural concentrations (natural geochemical background) and those possibly coming from anthropogenic sources other than the ones of the study site (e.g. non-point source pollution caused by fertilizers,

Constitutive metrics of the Standardized Global Biological Index (IBGN), revealing the sensitivity of aquatic invertebrates to pollution (mainly organic).

Pollution containing bacteria of intestinal origin.

As opposed to "chronic pollution", it is a pollution characterized by unpredictability about: the time of the accident, the place of the accident, the type of pollutant, the amount spilled, the circumstances of the accident, the consequences of the accident.

Sediment-dwelling worm used to determine sediment quality or even the environmental contamination of the medium by micro-pollutants.