Study on removal of heavy metals from landfill leachate by Fenton’s process and modified Fenton’s process. Classical and modified Fenton process were investigated to remove zinc, copper and lead from landfill leachate from three different municipal waste landfills. In the modified process, after the initial acidification of the leachate and 4h of sedimentation resulting sludge was separated, and the Fenton’s process continued. The study was conducted at pH 2, 3, 4. Modified Fenton’s process usually allows to remove more metal than the classical one.