decontamination

US /ˌdiː.kən.tæm.əˈneɪ.ʃən/
UK /ˌdiː.kən.tæm.əˈneɪ.ʃən/
1.

descontaminación

the action of removing dangerous substances from something:

:
•
Thorough decontamination of the site will be required.