decontamination
Technical and formal term for removing contamination, especially radioactive, chemical, or biological hazards.
After the accident, extensive decontamination was carried out.
Special equipment is needed for decontamination work.
More common and general term for decontamination, often used in news and everyday contexts. 汚染除去 is more formal and technical.
Compound of 汚染 (pollution, contamination) and 除去 (removal, elimination).