<p>The purpose of this paper is to study the influence of waste age on quality of leachate leaching out from sanitarythat yield various pollutants that pose environmental pollution to soil and groundwater.</p>

This study examines the suitability of natural silica sand as a low-cost adsorbent for the removal of ammoniacal nitrogen and heavy metals, particularly iron and zinc, from semi-aerobic stabilized landfill leachate.