ENHANCED REMOVAL OF PERSISTENT CONTAMINANTS AND TOXICITY REDUCTION THROUGH THE APPLICATION OF A TRIPLE-STAGE FENTON PROCESS TO SANITARY LANDFILL LEACHATES FROM YUCATAN, MEXICO

Sanitary landfill leachate (SLL) is a mixture of highly toxic and recalcitrant pollutants that threatens the water quality Yucatán Peninsula karst aquifer, one most extensive aquifers on planet. To reduce adverse environmental impacts this wastewater, triple-stage Fenton process (FP) was applied in an old SLL. Removal efficiencies were evaluated terms physicochemical variables, metal(oid)s concentrations, mass spectrometric identification organic compounds Daphnia magna acute toxicity test. The FP achieved 88% chemical oxygen demand (COD) removal, representing improvement 13% compared to performed single stage. Further, such as aluminum, arsenic, chromium, nickel zinc well substantially reduced. With respect toxicity, treatment produced 64% reduction. Thus, system seems be effective option dangerous level