Leaching behavior of iron from simulated landfills with different operational modes

The aim of the present study was to investigate the leaching behavior of iron from simulated landfills with different operation modes, with an emphasis on the variation of iron in different oxidation state, ferrous Fe(II) and ferric Fe(III) percentage and the distribution of iron content in different landfill leachate fractions. The leaching behavior and accumulated amounts of iron leached out by leachate from conventional landfill (CL) and leachate recirculated landfill (RL) exhibited decidedly different trends except for the initial 28 days. In addition, the percentage of iron leached from CL and RL accounted 1.00% and 0.14% for the total amount in landfills, respectively. No correlations between iron and selected characteristics in leachate were found were observed in the two simulated landfills. Significant positive correlations between particulate bound iron and Fe(III) were found in the leachates from RL (R2 = 0.748) and CL (R2 = 0.833).

► Iron leaching behavior of two landfills exhibited decidedly different trends.
► Only 1.00% (CL) and 0.14% (RL) iron leached from two simulated landfills.
► No correlations between iron and selected characteristics in leachate were found.
► Fe(II) increased with time proceeding with an average of 89.4% (CL) 79.7% (RL).
► Significant correlations between particulate bound iron and Fe(III) were found.