This paper aims at assessing organic matter and nitrogen compounds removal as well as identifying the organic compounds present in the leachate treated by an integrated physico-chemical system (coagulation-Fenton oxidation (FO)-adsorption). The raw and treated leachate were analyzed for the followings parameters: chemical oxygen demand (COD), biochemical oxygen demand (BOD 5 ), and ammonium nitrogen (N-NH 4 + ). The adsorption treatment was based on powdered zeolite 4 A (PZ) and the commercially powdered activated carbon (PAC). The identification of organic compounds using gas chromatography coupled to the mass spectrometry (GC-MS). The raw leachate is characterized by high concentrations of organic load expressed in COD (16,200 mg O 2 L -1 ) and a high ammonium nitrogen load (1,623-2,120 mg L -1 ). The removal of leachate treatment was defined for raw and treated leachate. PZ adsorption removed the highest nitrogen pollutants then PAC adsorption. In the coagulation-FO-PZ adsorption, the removal efficiency reached 93% for N-NH 4 + , 97% for COD, and 92% for BOD 5 and during coagulation-FO-PAC adsorption, the removal efficiency was equal to 59% for N-NH 4 + , 98% for COD, and 95% for BOD 5 . GC-MS analysis showed that both integrated systems studied promoted a high reduction of organic compounds from leachate (99%).