Development of Hybrid Systems by Integrating an Adsorption Process with Natural Zeolite and/or Palygorskite into the Electrocoagulation Treatment of Sanitary Landfill Leachate

The effectiveness of a hybrid approach comprising electrocoagulation (EC) and adsorption (AD) (using natural zeolite and/or palygorskite) processes to treat raw sanitary landfill leachate (SLL) was investigated in terms color, dissolved chemical oxygen demand (d-COD), nitrate nitrogen (NO3−-N) ammonium (NH4+-N) removal. Optimal EC conditions were found with current density 30 mA cm−2, Fe electrode material pH 8. Implementation the AD process using (ADzeo) as pre- or post-treatment for significantly increased NH4+-N removal efficiency. ADzeo-EC sequential treatment showed considerably higher color compared EC-ADzeo therefore determined be optimal treatment. Integration palygorskite (ADpal) into first middle stage system enhanced overall NO3−-N ADzeo-ADpal-EC exhibited highest simultaneous efficiencies d-COD, NH4+-N, corresponding 95.06 ± 0.19%, 48.89 0.89%, 68.38 0.93% 78.25 0.61%, respectively. results this study indicate that is promising efficient treating leachate.