DETOXIFYING AGENT FOR USE IN DISPOSAL OF NOXIOUS WASTES THAT IS CONDUCTED BY SOLIDIFYING THEM WITH CEMENT

摘要

A detoxifying agent for use in disposal of noxious wastes that is conducted by solidifying them with cement, consisting essentially of an aqueous solution which comprises as main components (a) small-sized metal cations whose 6-coordination ionic radii are less than 100 pm, selected from Li<+>, Mg<2+>, Mn<2+>, Fe<3+> and Mi<2+>; (b) medium-sized metal cations whose 6-coordination ionic radii are between 100 pm and 140 pm, selected from Ma<+>, Ca<2+> and Sr<2+>; and (c) large-sized metal cations whose 6-coordination ionic radii are in excess of 140 pm, selected from Ba<2+>, K<+> and Rb<+>. This detoxifying agent can provide cement-solidified materials having high strength, substantially free from exudation of toxic substances such as heavy metals, PCBs and dioxins.