METHOD OF REMOVING LEAD COMPOUND FROM INCINERATION ASH

摘要

PROBLEM TO BE SOLVED: To provide a method of removing efficiently a Pb compound in incineration ash at a low cost. SOLUTION: In a method of removing a Pb compound contained in incineration ash from it, the incineration ash is kept under an alkali hydrothermal condition, the Pb compound in the incineration ash is subjected to the alkali hydrothermal reaction, and the resultant is dissolved in an alkali aqueous solution.