METHOD FOR PREPARING ADSORBENT OF HEAVY METAL USING FLY ASH

摘要

PURPOSE: Provided is a method for preparing adsorbent for heavy metals by adding sodium sulfate and water to fly ash as additives and heating it to stabilize hazardous material in fly ash, thereby preparing adsorbent with large specific surface area and high adsorbability at low cost. CONSTITUTION: The method comprises the steps of (a) mixing fly ash collected by a dust collector in an incinerator, sodium sulfate and water with a mixing ratio of 4 : 0.5 to 1.5 : 5 to 6, (b) molding the mixture of the step (a) in granular form, (c) heating the granular form of the mixture at temperature in the range of 700 to 900°C, and (d) cooling the granular form of mixture.