STUDY ON ADSORPTION PERFORMANCE OF FOOD WASTES FOR VARIOUS HEAVY METALS

Abstract

The harmful materials are come to a head through the redevelopment in empty lots in recent years. The soil and groundwater contaminations are often caused by heavy metals and the volatile organic compounds. The cleaning treatment water for the excavated soil and the contaminated water pumping is generated by digging and washing the contaminated soil. The adsorption disposal by the activated carbon is conducted as the disposal method for both contaminated water and pumped groundwater after the aeration disposal. However, the activated carbon has a low adsorption performance for inorganic substances such as the heavy metals. Thus, in this study, the rice husk and fish bones which are an industrial waste are focused on. The material cost is saved by using industrial waste.  The product process of the fish bone is only burning,and the rice husk is not manufactured. It is examined whether both materials can be used as the adsorbent for the heavy metals. As the results of examinations, it is clarified that some heavy metals such as Zn²⁺ and Cd²⁺ are well adsorbed into both materials and both materials are useful as the recycling materials.