denitrify
Concise Oxford English Dictionary © 2008 Oxford University Press:
denitrify /diːˈnʌɪtrɪfʌɪ/
▶verb (denitrifies, denitrifying, denitrified) remove the nitrates or nitrites from (soil, water, etc.) by chemical reduction.
– derivatives
denitrification noun.
denitrification noun.
'denitrify' also found in these Oxford entries:

