What does bioremediation mean?
Bioremediation is the use of living organisms — most often bacteria and fungi, sometimes plants — to break down or neutralize environmental pollutants such as oil, pesticides, solvents, and excess nutrients. Rather than excavating contaminated soil or pumping tainted groundwater for chemical treatment, practitioners encourage microbes already present, or introduce specialized strains, to digest hazardous compounds into less harmful substances like water, carbon dioxide, and biomass. The technique gained prominence after the 1989 Exxon Valdez oil spill, when nutrient treatments accelerated natural bacterial degradation along Alaska's coastline. Variants include phytoremediation, which uses plants, and mycoremediation, which uses fungi. Bioremediation can be performed in situ, at the contamination site itself, or ex situ in controlled reactors. Valued as a comparatively low-cost, environmentally gentle alternative to conventional cleanup, it nonetheless works slowly and only under suitable conditions. The word appears chiefly in scientific, engineering, and policy contexts, and it connotes sustainable, biology-driven solutions to pollution.
nounThe use of living microorganisms, such as bacteria and fungi, to break down or neutralize pollutants in contaminated soil, water, or other environments.
- The deliberate use of microorganisms or plants to degrade, detoxify, or remove environmental pollutants from soil, water, or air.
"Scientists deployed bioremediation to clean the oil spill, letting native bacteria digest the hydrocarbons naturally."
"Engineers turned to bioremediation after the spill, seeding the shoreline with oil-eating bacteria rather than hauling away tons of contaminated sand."
"Phytoremediation, a form of bioremediation that uses plants to draw heavy metals from soil, has become a cost-effective option for reclaiming former industrial sites."
Rarely used; the word is almost always uncountable, referring to the technique or process in general rather than countable instances. A plural would appear only in technical writing enumerating distinct cleanup operations.
"The agency compared the costs of several bioremediations carried out across different sites."
After the Exxon Valdez spill, scientists fertilized Alaska's beaches with nutrients so bacteria could eat the oil — one of bioremediation's most famous real-world successes.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of bioremediation
Bioremediation combines the Greek-derived prefix 'bio-' (from bios, meaning 'life') with 'remediation,' from Latin remedium, 'a cure or remedy' — literally 'healing life' applied to a damaged environment. The compound was coined in the late twentieth century as microbiologists developed practical methods for microbial cleanup of oil spills and industrial waste, becoming widespread in environmental science from the 1980s onward. It shares its 'bio-' element with words like biology, biosphere, and symbiosis, and its Latin root with remedy, remedial, and medicine.
Related word forms
How bioremediation is actually used
A technical term used primarily in environmental science, ecology, engineering, and regulatory contexts; it carries a broadly positive connotation of eco-friendly cleanup. It is typically treated as an uncountable noun. Related subtypes include phytoremediation (using plants) and mycoremediation (using fungi).
Easily confused with bioremediation
Biodegradation is the general breakdown of substances by microbes, while bioremediation specifically refers to deliberately using that process to clean up pollution.