NDA-150 resin for the post-treatment of landfill leachate after a biological technique

NDA-150 resin was adopted as adsorbent for the removal of organic matters from leachate biological treatment effluent.The pH of leachate influenced the adsorption rate on NDA-150 resin greatly,and the optimum pH was 2.0.Static adsorption experiments showed that the adsorption was faster in the beginning and the COD of final effluent was lower than 100 mg/L in 24 hours.The adsorption process reached equilibrium in 72 hours,and could fit well with Freundlich equation.The adsorption process was exothermal and exhibited the favorability of organic matters onto NDA-150 resin.The breakthrough curve and desorption curve showed the adsorption capacity of COD for NDA-150 resin was 175.6 mg/g,and desorption peak was lumped.When volume of NaOH was120 mL,99.8% of adsorbed organic matters were desorbed.