decontaminate

de|con|tami|nate /d'iːkənt'æmɪneɪt/ (decontaminates decontaminating decontaminated)
[VERB] V n
To decontaminate something means to remove all germs or dangerous substances from it.
...procedures for decontaminating pilots hit by chemical weapons.
decontamination [N-UNCOUNT]
The land will require public money for decontamination.