Environmental remediation is the elimination of different types of pollution (air, water, soil) with the goal of re-establishing health and ecological quality conditions that are compatible with the re-use of polluted locations and resources, or even with the restoration of ecosystems.
Environmental remediation processes are specific to each type of pollutant and each resource affected. These procedures may be included in regular processes and activities (sewage, treatment,WEEE, etc.) or be used from time to time after a disaster or accidental pollution.
Whether physical, chemical or biological, environmental remediation processes are classified into two groups. They are either applied on-site (in situ), or require the extraction of materials for decontamination and further treatment on a specialised site (ex situ).
An environmental remediation work site for soil contaminated by the hydrocarbons from an old service station. © Stephen Johnson CC by-nc-sa 2.0